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CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | llcp_sock_recvmsg | llcp_sock_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
int noblock = flags & MSG_DONTWAIT;
struct sock *sk = sock->sk;
unsigned int copied, rlen;
struct sk_buff *skb, *cskb;
int err = 0;
pr_debug("%p %zu\n", sk, len);
msg->msg_namelen = 0;
lock_sock(sk);
if (sk->sk_state == LLCP_CLOSED &&
skb_queue_empty(&sk->sk_receive_queue)) {
release_sock(sk);
return 0;
}
release_sock(sk);
if (flags & (MSG_OOB))
return -EOPNOTSUPP;
skb = skb_recv_datagram(sk, flags, noblock, &err);
if (!skb) {
pr_err("Recv datagram failed state %d %d %d",
sk->sk_state, err, sock_error(sk));
if (sk->sk_shutdown & RCV_SHUTDOWN)
return 0;
return err;
}
rlen = skb->len; /* real length of skb */
copied = min_t(unsigned int, rlen, len);
cskb = skb;
if (skb_copy_datagram_iovec(cskb, 0, msg->msg_iov, copied)) {
if (!(flags & MSG_PEEK))
skb_queue_head(&sk->sk_receive_queue, skb);
return -EFAULT;
}
sock_recv_timestamp(msg, sk, skb);
if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
struct sockaddr_nfc_llcp *sockaddr =
(struct sockaddr_nfc_llcp *) msg->msg_name;
msg->msg_namelen = sizeof(struct sockaddr_nfc_llcp);
pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
memset(sockaddr, 0, sizeof(*sockaddr));
sockaddr->sa_family = AF_NFC;
sockaddr->nfc_protocol = NFC_PROTO_NFC_DEP;
sockaddr->dsap = ui_cb->dsap;
sockaddr->ssap = ui_cb->ssap;
}
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
/* SOCK_STREAM: re-queue skb if it contains unreceived data */
if (sk->sk_type == SOCK_STREAM ||
sk->sk_type == SOCK_DGRAM ||
sk->sk_type == SOCK_RAW) {
skb_pull(skb, copied);
if (skb->len) {
skb_queue_head(&sk->sk_receive_queue, skb);
goto done;
}
}
kfree_skb(skb);
}
/* XXX Queue backlogged skbs */
done:
/* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */
if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC))
copied = rlen;
return copied;
} | 436 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | llcp_sock_recvmsg | llcp_sock_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
int noblock = flags & MSG_DONTWAIT;
struct sock *sk = sock->sk;
unsigned int copied, rlen;
struct sk_buff *skb, *cskb;
int err = 0;
pr_debug("%p %zu\n", sk, len);
msg->msg_namelen = 0;
lock_sock(sk);
if (sk->sk_state == LLCP_CLOSED &&
skb_queue_empty(&sk->sk_receive_queue)) {
release_sock(sk);
return 0;
}
release_sock(sk);
if (flags & (MSG_OOB))
return -EOPNOTSUPP;
skb = skb_recv_datagram(sk, flags, noblock, &err);
if (!skb) {
pr_err("Recv datagram failed state %d %d %d",
sk->sk_state, err, sock_error(sk));
if (sk->sk_shutdown & RCV_SHUTDOWN)
return 0;
return err;
}
rlen = skb->len; /* real length of skb */
copied = min_t(unsigned int, rlen, len);
cskb = skb;
if (skb_copy_datagram_iovec(cskb, 0, msg->msg_iov, copied)) {
if (!(flags & MSG_PEEK))
skb_queue_head(&sk->sk_receive_queue, skb);
return -EFAULT;
}
sock_recv_timestamp(msg, sk, skb);
if (sk->sk_type == SOCK_DGRAM && msg->msg_name) {
struct nfc_llcp_ui_cb *ui_cb = nfc_llcp_ui_skb_cb(skb);
struct sockaddr_nfc_llcp *sockaddr =
(struct sockaddr_nfc_llcp *) msg->msg_name;
msg->msg_namelen = sizeof(struct sockaddr_nfc_llcp);
pr_debug("Datagram socket %d %d\n", ui_cb->dsap, ui_cb->ssap);
memset(sockaddr, 0, sizeof(*sockaddr));
sockaddr->sa_family = AF_NFC;
sockaddr->nfc_protocol = NFC_PROTO_NFC_DEP;
sockaddr->dsap = ui_cb->dsap;
sockaddr->ssap = ui_cb->ssap;
}
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
/* SOCK_STREAM: re-queue skb if it contains unreceived data */
if (sk->sk_type == SOCK_STREAM ||
sk->sk_type == SOCK_DGRAM ||
sk->sk_type == SOCK_RAW) {
skb_pull(skb, copied);
if (skb->len) {
skb_queue_head(&sk->sk_receive_queue, skb);
goto done;
}
}
kfree_skb(skb);
}
/* XXX Queue backlogged skbs */
done:
/* SOCK_SEQPACKET: return real length if MSG_TRUNC is set */
if (sk->sk_type == SOCK_SEQPACKET && (flags & MSG_TRUNC))
copied = rlen;
return copied;
} | 436 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rawsock_recvmsg | rawsock_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int rawsock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
int noblock = flags & MSG_DONTWAIT;
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied;
int rc;
pr_debug("sock=%p sk=%p len=%zu flags=%d\n", sock, sk, len, flags);
skb = skb_recv_datagram(sk, flags, noblock, &rc);
if (!skb)
return rc;
msg->msg_namelen = 0;
copied = skb->len;
if (len < copied) {
msg->msg_flags |= MSG_TRUNC;
copied = len;
}
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
skb_free_datagram(sk, skb);
return rc ? : copied;
} | 145 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rawsock_recvmsg | rawsock_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int rawsock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
int noblock = flags & MSG_DONTWAIT;
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied;
int rc;
pr_debug("sock=%p sk=%p len=%zu flags=%d\n", sock, sk, len, flags);
skb = skb_recv_datagram(sk, flags, noblock, &rc);
if (!skb)
return rc;
msg->msg_namelen = 0;
copied = skb->len;
if (len < copied) {
msg->msg_flags |= MSG_TRUNC;
copied = len;
}
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
skb_free_datagram(sk, skb);
return rc ? : copied;
} | 145 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 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'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rawsock_recvmsg | rawsock_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int rawsock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
int noblock = flags & MSG_DONTWAIT;
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied;
int rc;
pr_debug("sock=%p sk=%p len=%zu flags=%d\n", sock, sk, len, flags);
skb = skb_recv_datagram(sk, flags, noblock, &rc);
if (!skb)
return rc;
msg->msg_namelen = 0;
copied = skb->len;
if (len < copied) {
msg->msg_flags |= MSG_TRUNC;
copied = len;
}
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
skb_free_datagram(sk, skb);
return rc ? : copied;
} | 145 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rawsock_recvmsg | rawsock_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int rawsock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
int noblock = flags & MSG_DONTWAIT;
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied;
int rc;
pr_debug("sock=%p sk=%p len=%zu flags=%d\n", sock, sk, len, flags);
skb = skb_recv_datagram(sk, flags, noblock, &rc);
if (!skb)
return rc;
msg->msg_namelen = 0;
copied = skb->len;
if (len < copied) {
msg->msg_flags |= MSG_TRUNC;
copied = len;
}
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
skb_free_datagram(sk, skb);
return rc ? : copied;
} | 145 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rawsock_recvmsg | rawsock_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int rawsock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
int noblock = flags & MSG_DONTWAIT;
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied;
int rc;
pr_debug("sock=%p sk=%p len=%zu flags=%d\n", sock, sk, len, flags);
skb = skb_recv_datagram(sk, flags, noblock, &rc);
if (!skb)
return rc;
msg->msg_namelen = 0;
copied = skb->len;
if (len < copied) {
msg->msg_flags |= MSG_TRUNC;
copied = len;
}
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
skb_free_datagram(sk, skb);
return rc ? : copied;
} | 145 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 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'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rawsock_recvmsg | rawsock_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int rawsock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
int noblock = flags & MSG_DONTWAIT;
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied;
int rc;
pr_debug("sock=%p sk=%p len=%zu flags=%d\n", sock, sk, len, flags);
skb = skb_recv_datagram(sk, flags, noblock, &rc);
if (!skb)
return rc;
msg->msg_namelen = 0;
copied = skb->len;
if (len < copied) {
msg->msg_flags |= MSG_TRUNC;
copied = len;
}
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
skb_free_datagram(sk, skb);
return rc ? : copied;
} | 145 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 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'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | packet_recvmsg | packet_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied, err;
struct sockaddr_ll *sll;
int vnet_hdr_len = 0;
err = -EINVAL;
if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT|MSG_ERRQUEUE))
goto out;
#if 0
/* What error should we return now? EUNATTACH? */
if (pkt_sk(sk)->ifindex < 0)
return -ENODEV;
#endif
if (flags & MSG_ERRQUEUE) {
err = sock_recv_errqueue(sk, msg, len,
SOL_PACKET, PACKET_TX_TIMESTAMP);
goto out;
}
/*
* Call the generic datagram receiver. This handles all sorts
* of horrible races and re-entrancy so we can forget about it
* in the protocol layers.
*
* Now it will return ENETDOWN, if device have just gone down,
* but then it will block.
*/
skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
/*
* An error occurred so return it. Because skb_recv_datagram()
* handles the blocking we don't see and worry about blocking
* retries.
*/
if (skb == NULL)
goto out;
if (pkt_sk(sk)->has_vnet_hdr) {
struct virtio_net_hdr vnet_hdr = { 0 };
err = -EINVAL;
vnet_hdr_len = sizeof(vnet_hdr);
if (len < vnet_hdr_len)
goto out_free;
len -= vnet_hdr_len;
if (skb_is_gso(skb)) {
struct skb_shared_info *sinfo = skb_shinfo(skb);
/* This is a hint as to how much should be linear. */
vnet_hdr.hdr_len = skb_headlen(skb);
vnet_hdr.gso_size = sinfo->gso_size;
if (sinfo->gso_type & SKB_GSO_TCPV4)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (sinfo->gso_type & SKB_GSO_TCPV6)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
else if (sinfo->gso_type & SKB_GSO_UDP)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;
else if (sinfo->gso_type & SKB_GSO_FCOE)
goto out_free;
else
BUG();
if (sinfo->gso_type & SKB_GSO_TCP_ECN)
vnet_hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
vnet_hdr.csum_start = skb_checksum_start_offset(skb);
vnet_hdr.csum_offset = skb->csum_offset;
} else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
err = memcpy_toiovec(msg->msg_iov, (void *)&vnet_hdr,
vnet_hdr_len);
if (err < 0)
goto out_free;
}
/*
* If the address length field is there to be filled in, we fill
* it in now.
*/
sll = &PACKET_SKB_CB(skb)->sa.ll;
if (sock->type == SOCK_PACKET)
msg->msg_namelen = sizeof(struct sockaddr_pkt);
else
msg->msg_namelen = sll->sll_halen + offsetof(struct sockaddr_ll, sll_addr);
/*
* You lose any data beyond the buffer you gave. If it worries a
* user program they can ask the device for its MTU anyway.
*/
copied = skb->len;
if (copied > len) {
copied = len;
msg->msg_flags |= MSG_TRUNC;
}
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (err)
goto out_free;
sock_recv_ts_and_drops(msg, sk, skb);
if (msg->msg_name)
memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa,
msg->msg_namelen);
if (pkt_sk(sk)->auxdata) {
struct tpacket_auxdata aux;
aux.tp_status = TP_STATUS_USER;
if (skb->ip_summed == CHECKSUM_PARTIAL)
aux.tp_status |= TP_STATUS_CSUMNOTREADY;
aux.tp_len = PACKET_SKB_CB(skb)->origlen;
aux.tp_snaplen = skb->len;
aux.tp_mac = 0;
aux.tp_net = skb_network_offset(skb);
if (vlan_tx_tag_present(skb)) {
aux.tp_vlan_tci = vlan_tx_tag_get(skb);
aux.tp_status |= TP_STATUS_VLAN_VALID;
} else {
aux.tp_vlan_tci = 0;
}
aux.tp_padding = 0;
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
}
/*
* Free or return the buffer as appropriate. Again this
* hides all the races and re-entrancy issues from us.
*/
err = vnet_hdr_len + ((flags&MSG_TRUNC) ? skb->len : copied);
out_free:
skb_free_datagram(sk, skb);
out:
return err;
} | 667 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.44:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | packet_recvmsg | packet_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied, err;
struct sockaddr_ll *sll;
int vnet_hdr_len = 0;
err = -EINVAL;
if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT|MSG_ERRQUEUE))
goto out;
#if 0
/* What error should we return now? EUNATTACH? */
if (pkt_sk(sk)->ifindex < 0)
return -ENODEV;
#endif
if (flags & MSG_ERRQUEUE) {
err = sock_recv_errqueue(sk, msg, len,
SOL_PACKET, PACKET_TX_TIMESTAMP);
goto out;
}
/*
* Call the generic datagram receiver. This handles all sorts
* of horrible races and re-entrancy so we can forget about it
* in the protocol layers.
*
* Now it will return ENETDOWN, if device have just gone down,
* but then it will block.
*/
skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
/*
* An error occurred so return it. Because skb_recv_datagram()
* handles the blocking we don't see and worry about blocking
* retries.
*/
if (skb == NULL)
goto out;
if (pkt_sk(sk)->has_vnet_hdr) {
struct virtio_net_hdr vnet_hdr = { 0 };
err = -EINVAL;
vnet_hdr_len = sizeof(vnet_hdr);
if (len < vnet_hdr_len)
goto out_free;
len -= vnet_hdr_len;
if (skb_is_gso(skb)) {
struct skb_shared_info *sinfo = skb_shinfo(skb);
/* This is a hint as to how much should be linear. */
vnet_hdr.hdr_len = skb_headlen(skb);
vnet_hdr.gso_size = sinfo->gso_size;
if (sinfo->gso_type & SKB_GSO_TCPV4)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (sinfo->gso_type & SKB_GSO_TCPV6)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
else if (sinfo->gso_type & SKB_GSO_UDP)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;
else if (sinfo->gso_type & SKB_GSO_FCOE)
goto out_free;
else
BUG();
if (sinfo->gso_type & SKB_GSO_TCP_ECN)
vnet_hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
vnet_hdr.csum_start = skb_checksum_start_offset(skb);
vnet_hdr.csum_offset = skb->csum_offset;
} else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
err = memcpy_toiovec(msg->msg_iov, (void *)&vnet_hdr,
vnet_hdr_len);
if (err < 0)
goto out_free;
}
/*
* If the address length field is there to be filled in, we fill
* it in now.
*/
sll = &PACKET_SKB_CB(skb)->sa.ll;
if (sock->type == SOCK_PACKET)
msg->msg_namelen = sizeof(struct sockaddr_pkt);
else
msg->msg_namelen = sll->sll_halen + offsetof(struct sockaddr_ll, sll_addr);
/*
* You lose any data beyond the buffer you gave. If it worries a
* user program they can ask the device for its MTU anyway.
*/
copied = skb->len;
if (copied > len) {
copied = len;
msg->msg_flags |= MSG_TRUNC;
}
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (err)
goto out_free;
sock_recv_ts_and_drops(msg, sk, skb);
if (msg->msg_name)
memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa,
msg->msg_namelen);
if (pkt_sk(sk)->auxdata) {
struct tpacket_auxdata aux;
aux.tp_status = TP_STATUS_USER;
if (skb->ip_summed == CHECKSUM_PARTIAL)
aux.tp_status |= TP_STATUS_CSUMNOTREADY;
aux.tp_len = PACKET_SKB_CB(skb)->origlen;
aux.tp_snaplen = skb->len;
aux.tp_mac = 0;
aux.tp_net = skb_network_offset(skb);
if (vlan_tx_tag_present(skb)) {
aux.tp_vlan_tci = vlan_tx_tag_get(skb);
aux.tp_status |= TP_STATUS_VLAN_VALID;
} else {
aux.tp_vlan_tci = 0;
}
aux.tp_padding = 0;
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
}
/*
* Free or return the buffer as appropriate. Again this
* hides all the races and re-entrancy issues from us.
*/
err = vnet_hdr_len + ((flags&MSG_TRUNC) ? skb->len : copied);
out_free:
skb_free_datagram(sk, skb);
out:
return err;
} | 667 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | packet_recvmsg | packet_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied, err;
struct sockaddr_ll *sll;
int vnet_hdr_len = 0;
err = -EINVAL;
if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT|MSG_ERRQUEUE))
goto out;
#if 0
/* What error should we return now? EUNATTACH? */
if (pkt_sk(sk)->ifindex < 0)
return -ENODEV;
#endif
if (flags & MSG_ERRQUEUE) {
err = sock_recv_errqueue(sk, msg, len,
SOL_PACKET, PACKET_TX_TIMESTAMP);
goto out;
}
/*
* Call the generic datagram receiver. This handles all sorts
* of horrible races and re-entrancy so we can forget about it
* in the protocol layers.
*
* Now it will return ENETDOWN, if device have just gone down,
* but then it will block.
*/
skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
/*
* An error occurred so return it. Because skb_recv_datagram()
* handles the blocking we don't see and worry about blocking
* retries.
*/
if (skb == NULL)
goto out;
if (pkt_sk(sk)->has_vnet_hdr) {
struct virtio_net_hdr vnet_hdr = { 0 };
err = -EINVAL;
vnet_hdr_len = sizeof(vnet_hdr);
if (len < vnet_hdr_len)
goto out_free;
len -= vnet_hdr_len;
if (skb_is_gso(skb)) {
struct skb_shared_info *sinfo = skb_shinfo(skb);
/* This is a hint as to how much should be linear. */
vnet_hdr.hdr_len = skb_headlen(skb);
vnet_hdr.gso_size = sinfo->gso_size;
if (sinfo->gso_type & SKB_GSO_TCPV4)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (sinfo->gso_type & SKB_GSO_TCPV6)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
else if (sinfo->gso_type & SKB_GSO_UDP)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;
else if (sinfo->gso_type & SKB_GSO_FCOE)
goto out_free;
else
BUG();
if (sinfo->gso_type & SKB_GSO_TCP_ECN)
vnet_hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
vnet_hdr.csum_start = skb_checksum_start_offset(skb);
vnet_hdr.csum_offset = skb->csum_offset;
} else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
err = memcpy_toiovec(msg->msg_iov, (void *)&vnet_hdr,
vnet_hdr_len);
if (err < 0)
goto out_free;
}
/*
* If the address length field is there to be filled in, we fill
* it in now.
*/
sll = &PACKET_SKB_CB(skb)->sa.ll;
if (sock->type == SOCK_PACKET)
msg->msg_namelen = sizeof(struct sockaddr_pkt);
else
msg->msg_namelen = sll->sll_halen + offsetof(struct sockaddr_ll, sll_addr);
/*
* You lose any data beyond the buffer you gave. If it worries a
* user program they can ask the device for its MTU anyway.
*/
copied = skb->len;
if (copied > len) {
copied = len;
msg->msg_flags |= MSG_TRUNC;
}
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (err)
goto out_free;
sock_recv_ts_and_drops(msg, sk, skb);
if (msg->msg_name)
memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa,
msg->msg_namelen);
if (pkt_sk(sk)->auxdata) {
struct tpacket_auxdata aux;
aux.tp_status = TP_STATUS_USER;
if (skb->ip_summed == CHECKSUM_PARTIAL)
aux.tp_status |= TP_STATUS_CSUMNOTREADY;
aux.tp_len = PACKET_SKB_CB(skb)->origlen;
aux.tp_snaplen = skb->len;
aux.tp_mac = 0;
aux.tp_net = skb_network_offset(skb);
if (vlan_tx_tag_present(skb)) {
aux.tp_vlan_tci = vlan_tx_tag_get(skb);
aux.tp_status |= TP_STATUS_VLAN_VALID;
} else {
aux.tp_vlan_tci = 0;
}
aux.tp_padding = 0;
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
}
/*
* Free or return the buffer as appropriate. Again this
* hides all the races and re-entrancy issues from us.
*/
err = vnet_hdr_len + ((flags&MSG_TRUNC) ? skb->len : copied);
out_free:
skb_free_datagram(sk, skb);
out:
return err;
} | 667 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | packet_recvmsg | packet_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied, err;
struct sockaddr_ll *sll;
int vnet_hdr_len = 0;
err = -EINVAL;
if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT|MSG_ERRQUEUE))
goto out;
#if 0
/* What error should we return now? EUNATTACH? */
if (pkt_sk(sk)->ifindex < 0)
return -ENODEV;
#endif
if (flags & MSG_ERRQUEUE) {
err = sock_recv_errqueue(sk, msg, len,
SOL_PACKET, PACKET_TX_TIMESTAMP);
goto out;
}
/*
* Call the generic datagram receiver. This handles all sorts
* of horrible races and re-entrancy so we can forget about it
* in the protocol layers.
*
* Now it will return ENETDOWN, if device have just gone down,
* but then it will block.
*/
skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
/*
* An error occurred so return it. Because skb_recv_datagram()
* handles the blocking we don't see and worry about blocking
* retries.
*/
if (skb == NULL)
goto out;
if (pkt_sk(sk)->has_vnet_hdr) {
struct virtio_net_hdr vnet_hdr = { 0 };
err = -EINVAL;
vnet_hdr_len = sizeof(vnet_hdr);
if (len < vnet_hdr_len)
goto out_free;
len -= vnet_hdr_len;
if (skb_is_gso(skb)) {
struct skb_shared_info *sinfo = skb_shinfo(skb);
/* This is a hint as to how much should be linear. */
vnet_hdr.hdr_len = skb_headlen(skb);
vnet_hdr.gso_size = sinfo->gso_size;
if (sinfo->gso_type & SKB_GSO_TCPV4)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (sinfo->gso_type & SKB_GSO_TCPV6)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
else if (sinfo->gso_type & SKB_GSO_UDP)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;
else if (sinfo->gso_type & SKB_GSO_FCOE)
goto out_free;
else
BUG();
if (sinfo->gso_type & SKB_GSO_TCP_ECN)
vnet_hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
vnet_hdr.csum_start = skb_checksum_start_offset(skb);
vnet_hdr.csum_offset = skb->csum_offset;
} else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
err = memcpy_toiovec(msg->msg_iov, (void *)&vnet_hdr,
vnet_hdr_len);
if (err < 0)
goto out_free;
}
/*
* If the address length field is there to be filled in, we fill
* it in now.
*/
sll = &PACKET_SKB_CB(skb)->sa.ll;
if (sock->type == SOCK_PACKET)
msg->msg_namelen = sizeof(struct sockaddr_pkt);
else
msg->msg_namelen = sll->sll_halen + offsetof(struct sockaddr_ll, sll_addr);
/*
* You lose any data beyond the buffer you gave. If it worries a
* user program they can ask the device for its MTU anyway.
*/
copied = skb->len;
if (copied > len) {
copied = len;
msg->msg_flags |= MSG_TRUNC;
}
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (err)
goto out_free;
sock_recv_ts_and_drops(msg, sk, skb);
if (msg->msg_name)
memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa,
msg->msg_namelen);
if (pkt_sk(sk)->auxdata) {
struct tpacket_auxdata aux;
aux.tp_status = TP_STATUS_USER;
if (skb->ip_summed == CHECKSUM_PARTIAL)
aux.tp_status |= TP_STATUS_CSUMNOTREADY;
aux.tp_len = PACKET_SKB_CB(skb)->origlen;
aux.tp_snaplen = skb->len;
aux.tp_mac = 0;
aux.tp_net = skb_network_offset(skb);
if (vlan_tx_tag_present(skb)) {
aux.tp_vlan_tci = vlan_tx_tag_get(skb);
aux.tp_status |= TP_STATUS_VLAN_VALID;
} else {
aux.tp_vlan_tci = 0;
}
aux.tp_padding = 0;
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
}
/*
* Free or return the buffer as appropriate. Again this
* hides all the races and re-entrancy issues from us.
*/
err = vnet_hdr_len + ((flags&MSG_TRUNC) ? skb->len : copied);
out_free:
skb_free_datagram(sk, skb);
out:
return err;
} | 667 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.34:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.48:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.35:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.36:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.58:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | packet_recvmsg | packet_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied, err;
struct sockaddr_ll *sll;
int vnet_hdr_len = 0;
err = -EINVAL;
if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT|MSG_ERRQUEUE))
goto out;
#if 0
/* What error should we return now? EUNATTACH? */
if (pkt_sk(sk)->ifindex < 0)
return -ENODEV;
#endif
if (flags & MSG_ERRQUEUE) {
err = sock_recv_errqueue(sk, msg, len,
SOL_PACKET, PACKET_TX_TIMESTAMP);
goto out;
}
/*
* Call the generic datagram receiver. This handles all sorts
* of horrible races and re-entrancy so we can forget about it
* in the protocol layers.
*
* Now it will return ENETDOWN, if device have just gone down,
* but then it will block.
*/
skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
/*
* An error occurred so return it. Because skb_recv_datagram()
* handles the blocking we don't see and worry about blocking
* retries.
*/
if (skb == NULL)
goto out;
if (pkt_sk(sk)->has_vnet_hdr) {
struct virtio_net_hdr vnet_hdr = { 0 };
err = -EINVAL;
vnet_hdr_len = sizeof(vnet_hdr);
if (len < vnet_hdr_len)
goto out_free;
len -= vnet_hdr_len;
if (skb_is_gso(skb)) {
struct skb_shared_info *sinfo = skb_shinfo(skb);
/* This is a hint as to how much should be linear. */
vnet_hdr.hdr_len = skb_headlen(skb);
vnet_hdr.gso_size = sinfo->gso_size;
if (sinfo->gso_type & SKB_GSO_TCPV4)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (sinfo->gso_type & SKB_GSO_TCPV6)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
else if (sinfo->gso_type & SKB_GSO_UDP)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;
else if (sinfo->gso_type & SKB_GSO_FCOE)
goto out_free;
else
BUG();
if (sinfo->gso_type & SKB_GSO_TCP_ECN)
vnet_hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
vnet_hdr.csum_start = skb_checksum_start_offset(skb);
vnet_hdr.csum_offset = skb->csum_offset;
} else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
err = memcpy_toiovec(msg->msg_iov, (void *)&vnet_hdr,
vnet_hdr_len);
if (err < 0)
goto out_free;
}
/*
* If the address length field is there to be filled in, we fill
* it in now.
*/
sll = &PACKET_SKB_CB(skb)->sa.ll;
if (sock->type == SOCK_PACKET)
msg->msg_namelen = sizeof(struct sockaddr_pkt);
else
msg->msg_namelen = sll->sll_halen + offsetof(struct sockaddr_ll, sll_addr);
/*
* You lose any data beyond the buffer you gave. If it worries a
* user program they can ask the device for its MTU anyway.
*/
copied = skb->len;
if (copied > len) {
copied = len;
msg->msg_flags |= MSG_TRUNC;
}
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (err)
goto out_free;
sock_recv_ts_and_drops(msg, sk, skb);
if (msg->msg_name)
memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa,
msg->msg_namelen);
if (pkt_sk(sk)->auxdata) {
struct tpacket_auxdata aux;
aux.tp_status = TP_STATUS_USER;
if (skb->ip_summed == CHECKSUM_PARTIAL)
aux.tp_status |= TP_STATUS_CSUMNOTREADY;
aux.tp_len = PACKET_SKB_CB(skb)->origlen;
aux.tp_snaplen = skb->len;
aux.tp_mac = 0;
aux.tp_net = skb_network_offset(skb);
if (vlan_tx_tag_present(skb)) {
aux.tp_vlan_tci = vlan_tx_tag_get(skb);
aux.tp_status |= TP_STATUS_VLAN_VALID;
} else {
aux.tp_vlan_tci = 0;
}
aux.tp_padding = 0;
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
}
/*
* Free or return the buffer as appropriate. Again this
* hides all the races and re-entrancy issues from us.
*/
err = vnet_hdr_len + ((flags&MSG_TRUNC) ? skb->len : copied);
out_free:
skb_free_datagram(sk, skb);
out:
return err;
} | 667 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.34:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.35:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.58:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.36:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.48:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.42:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.57:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.64:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.37:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.8:*:*:*:*:*:*:*', 'cpe_name': []}, 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'cpe:2.3:o:linux:linux_kernel:3.0.55:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.56:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | packet_recvmsg | packet_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk = sock->sk;
struct sk_buff *skb;
int copied, err;
struct sockaddr_ll *sll;
int vnet_hdr_len = 0;
err = -EINVAL;
if (flags & ~(MSG_PEEK|MSG_DONTWAIT|MSG_TRUNC|MSG_CMSG_COMPAT|MSG_ERRQUEUE))
goto out;
#if 0
/* What error should we return now? EUNATTACH? */
if (pkt_sk(sk)->ifindex < 0)
return -ENODEV;
#endif
if (flags & MSG_ERRQUEUE) {
err = sock_recv_errqueue(sk, msg, len,
SOL_PACKET, PACKET_TX_TIMESTAMP);
goto out;
}
/*
* Call the generic datagram receiver. This handles all sorts
* of horrible races and re-entrancy so we can forget about it
* in the protocol layers.
*
* Now it will return ENETDOWN, if device have just gone down,
* but then it will block.
*/
skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &err);
/*
* An error occurred so return it. Because skb_recv_datagram()
* handles the blocking we don't see and worry about blocking
* retries.
*/
if (skb == NULL)
goto out;
if (pkt_sk(sk)->has_vnet_hdr) {
struct virtio_net_hdr vnet_hdr = { 0 };
err = -EINVAL;
vnet_hdr_len = sizeof(vnet_hdr);
if (len < vnet_hdr_len)
goto out_free;
len -= vnet_hdr_len;
if (skb_is_gso(skb)) {
struct skb_shared_info *sinfo = skb_shinfo(skb);
/* This is a hint as to how much should be linear. */
vnet_hdr.hdr_len = skb_headlen(skb);
vnet_hdr.gso_size = sinfo->gso_size;
if (sinfo->gso_type & SKB_GSO_TCPV4)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
else if (sinfo->gso_type & SKB_GSO_TCPV6)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
else if (sinfo->gso_type & SKB_GSO_UDP)
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_UDP;
else if (sinfo->gso_type & SKB_GSO_FCOE)
goto out_free;
else
BUG();
if (sinfo->gso_type & SKB_GSO_TCP_ECN)
vnet_hdr.gso_type |= VIRTIO_NET_HDR_GSO_ECN;
} else
vnet_hdr.gso_type = VIRTIO_NET_HDR_GSO_NONE;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
vnet_hdr.csum_start = skb_checksum_start_offset(skb);
vnet_hdr.csum_offset = skb->csum_offset;
} else if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
vnet_hdr.flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
err = memcpy_toiovec(msg->msg_iov, (void *)&vnet_hdr,
vnet_hdr_len);
if (err < 0)
goto out_free;
}
/*
* If the address length field is there to be filled in, we fill
* it in now.
*/
sll = &PACKET_SKB_CB(skb)->sa.ll;
if (sock->type == SOCK_PACKET)
msg->msg_namelen = sizeof(struct sockaddr_pkt);
else
msg->msg_namelen = sll->sll_halen + offsetof(struct sockaddr_ll, sll_addr);
/*
* You lose any data beyond the buffer you gave. If it worries a
* user program they can ask the device for its MTU anyway.
*/
copied = skb->len;
if (copied > len) {
copied = len;
msg->msg_flags |= MSG_TRUNC;
}
err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (err)
goto out_free;
sock_recv_ts_and_drops(msg, sk, skb);
if (msg->msg_name)
memcpy(msg->msg_name, &PACKET_SKB_CB(skb)->sa,
msg->msg_namelen);
if (pkt_sk(sk)->auxdata) {
struct tpacket_auxdata aux;
aux.tp_status = TP_STATUS_USER;
if (skb->ip_summed == CHECKSUM_PARTIAL)
aux.tp_status |= TP_STATUS_CSUMNOTREADY;
aux.tp_len = PACKET_SKB_CB(skb)->origlen;
aux.tp_snaplen = skb->len;
aux.tp_mac = 0;
aux.tp_net = skb_network_offset(skb);
if (vlan_tx_tag_present(skb)) {
aux.tp_vlan_tci = vlan_tx_tag_get(skb);
aux.tp_status |= TP_STATUS_VLAN_VALID;
} else {
aux.tp_vlan_tci = 0;
}
aux.tp_padding = 0;
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
}
/*
* Free or return the buffer as appropriate. Again this
* hides all the races and re-entrancy issues from us.
*/
err = vnet_hdr_len + ((flags&MSG_TRUNC) ? skb->len : copied);
out_free:
skb_free_datagram(sk, skb);
out:
return err;
} | 667 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rds_recvmsg | rds_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int msg_flags) | ['iocb', 'sock', 'msg', 'size', 'msg_flags'] | int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
size_t size, int msg_flags)
{
struct sock *sk = sock->sk;
struct rds_sock *rs = rds_sk_to_rs(sk);
long timeo;
int ret = 0, nonblock = msg_flags & MSG_DONTWAIT;
struct sockaddr_in *sin;
struct rds_incoming *inc = NULL;
/* udp_recvmsg()->sock_recvtimeo() gets away without locking too.. */
timeo = sock_rcvtimeo(sk, nonblock);
rdsdebug("size %zu flags 0x%x timeo %ld\n", size, msg_flags, timeo);
msg->msg_namelen = 0;
if (msg_flags & MSG_OOB)
goto out;
while (1) {
/* If there are pending notifications, do those - and nothing else */
if (!list_empty(&rs->rs_notify_queue)) {
ret = rds_notify_queue_get(rs, msg);
break;
}
if (rs->rs_cong_notify) {
ret = rds_notify_cong(rs, msg);
break;
}
if (!rds_next_incoming(rs, &inc)) {
if (nonblock) {
ret = -EAGAIN;
break;
}
timeo = wait_event_interruptible_timeout(*sk_sleep(sk),
(!list_empty(&rs->rs_notify_queue) ||
rs->rs_cong_notify ||
rds_next_incoming(rs, &inc)), timeo);
rdsdebug("recvmsg woke inc %p timeo %ld\n", inc,
timeo);
if (timeo > 0 || timeo == MAX_SCHEDULE_TIMEOUT)
continue;
ret = timeo;
if (ret == 0)
ret = -ETIMEDOUT;
break;
}
rdsdebug("copying inc %p from %pI4:%u to user\n", inc,
&inc->i_conn->c_faddr,
ntohs(inc->i_hdr.h_sport));
ret = inc->i_conn->c_trans->inc_copy_to_user(inc, msg->msg_iov,
size);
if (ret < 0)
break;
/*
* if the message we just copied isn't at the head of the
* recv queue then someone else raced us to return it, try
* to get the next message.
*/
if (!rds_still_queued(rs, inc, !(msg_flags & MSG_PEEK))) {
rds_inc_put(inc);
inc = NULL;
rds_stats_inc(s_recv_deliver_raced);
continue;
}
if (ret < be32_to_cpu(inc->i_hdr.h_len)) {
if (msg_flags & MSG_TRUNC)
ret = be32_to_cpu(inc->i_hdr.h_len);
msg->msg_flags |= MSG_TRUNC;
}
if (rds_cmsg_recv(inc, msg)) {
ret = -EFAULT;
goto out;
}
rds_stats_inc(s_recv_delivered);
sin = (struct sockaddr_in *)msg->msg_name;
if (sin) {
sin->sin_family = AF_INET;
sin->sin_port = inc->i_hdr.h_sport;
sin->sin_addr.s_addr = inc->i_saddr;
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
msg->msg_namelen = sizeof(*sin);
}
break;
}
if (inc)
rds_inc_put(inc);
out:
return ret;
} | 486 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rds_recvmsg | rds_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int msg_flags) | ['iocb', 'sock', 'msg', 'size', 'msg_flags'] | int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
size_t size, int msg_flags)
{
struct sock *sk = sock->sk;
struct rds_sock *rs = rds_sk_to_rs(sk);
long timeo;
int ret = 0, nonblock = msg_flags & MSG_DONTWAIT;
struct sockaddr_in *sin;
struct rds_incoming *inc = NULL;
/* udp_recvmsg()->sock_recvtimeo() gets away without locking too.. */
timeo = sock_rcvtimeo(sk, nonblock);
rdsdebug("size %zu flags 0x%x timeo %ld\n", size, msg_flags, timeo);
msg->msg_namelen = 0;
if (msg_flags & MSG_OOB)
goto out;
while (1) {
/* If there are pending notifications, do those - and nothing else */
if (!list_empty(&rs->rs_notify_queue)) {
ret = rds_notify_queue_get(rs, msg);
break;
}
if (rs->rs_cong_notify) {
ret = rds_notify_cong(rs, msg);
break;
}
if (!rds_next_incoming(rs, &inc)) {
if (nonblock) {
ret = -EAGAIN;
break;
}
timeo = wait_event_interruptible_timeout(*sk_sleep(sk),
(!list_empty(&rs->rs_notify_queue) ||
rs->rs_cong_notify ||
rds_next_incoming(rs, &inc)), timeo);
rdsdebug("recvmsg woke inc %p timeo %ld\n", inc,
timeo);
if (timeo > 0 || timeo == MAX_SCHEDULE_TIMEOUT)
continue;
ret = timeo;
if (ret == 0)
ret = -ETIMEDOUT;
break;
}
rdsdebug("copying inc %p from %pI4:%u to user\n", inc,
&inc->i_conn->c_faddr,
ntohs(inc->i_hdr.h_sport));
ret = inc->i_conn->c_trans->inc_copy_to_user(inc, msg->msg_iov,
size);
if (ret < 0)
break;
/*
* if the message we just copied isn't at the head of the
* recv queue then someone else raced us to return it, try
* to get the next message.
*/
if (!rds_still_queued(rs, inc, !(msg_flags & MSG_PEEK))) {
rds_inc_put(inc);
inc = NULL;
rds_stats_inc(s_recv_deliver_raced);
continue;
}
if (ret < be32_to_cpu(inc->i_hdr.h_len)) {
if (msg_flags & MSG_TRUNC)
ret = be32_to_cpu(inc->i_hdr.h_len);
msg->msg_flags |= MSG_TRUNC;
}
if (rds_cmsg_recv(inc, msg)) {
ret = -EFAULT;
goto out;
}
rds_stats_inc(s_recv_delivered);
sin = (struct sockaddr_in *)msg->msg_name;
if (sin) {
sin->sin_family = AF_INET;
sin->sin_port = inc->i_hdr.h_sport;
sin->sin_addr.s_addr = inc->i_saddr;
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
msg->msg_namelen = sizeof(*sin);
}
break;
}
if (inc)
rds_inc_put(inc);
out:
return ret;
} | 486 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.37:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.33:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.40:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.49:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.57:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.64:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.0.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.65:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rds_recvmsg | rds_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int msg_flags) | ['iocb', 'sock', 'msg', 'size', 'msg_flags'] | int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
size_t size, int msg_flags)
{
struct sock *sk = sock->sk;
struct rds_sock *rs = rds_sk_to_rs(sk);
long timeo;
int ret = 0, nonblock = msg_flags & MSG_DONTWAIT;
struct sockaddr_in *sin;
struct rds_incoming *inc = NULL;
/* udp_recvmsg()->sock_recvtimeo() gets away without locking too.. */
timeo = sock_rcvtimeo(sk, nonblock);
rdsdebug("size %zu flags 0x%x timeo %ld\n", size, msg_flags, timeo);
msg->msg_namelen = 0;
if (msg_flags & MSG_OOB)
goto out;
while (1) {
/* If there are pending notifications, do those - and nothing else */
if (!list_empty(&rs->rs_notify_queue)) {
ret = rds_notify_queue_get(rs, msg);
break;
}
if (rs->rs_cong_notify) {
ret = rds_notify_cong(rs, msg);
break;
}
if (!rds_next_incoming(rs, &inc)) {
if (nonblock) {
ret = -EAGAIN;
break;
}
timeo = wait_event_interruptible_timeout(*sk_sleep(sk),
(!list_empty(&rs->rs_notify_queue) ||
rs->rs_cong_notify ||
rds_next_incoming(rs, &inc)), timeo);
rdsdebug("recvmsg woke inc %p timeo %ld\n", inc,
timeo);
if (timeo > 0 || timeo == MAX_SCHEDULE_TIMEOUT)
continue;
ret = timeo;
if (ret == 0)
ret = -ETIMEDOUT;
break;
}
rdsdebug("copying inc %p from %pI4:%u to user\n", inc,
&inc->i_conn->c_faddr,
ntohs(inc->i_hdr.h_sport));
ret = inc->i_conn->c_trans->inc_copy_to_user(inc, msg->msg_iov,
size);
if (ret < 0)
break;
/*
* if the message we just copied isn't at the head of the
* recv queue then someone else raced us to return it, try
* to get the next message.
*/
if (!rds_still_queued(rs, inc, !(msg_flags & MSG_PEEK))) {
rds_inc_put(inc);
inc = NULL;
rds_stats_inc(s_recv_deliver_raced);
continue;
}
if (ret < be32_to_cpu(inc->i_hdr.h_len)) {
if (msg_flags & MSG_TRUNC)
ret = be32_to_cpu(inc->i_hdr.h_len);
msg->msg_flags |= MSG_TRUNC;
}
if (rds_cmsg_recv(inc, msg)) {
ret = -EFAULT;
goto out;
}
rds_stats_inc(s_recv_delivered);
sin = (struct sockaddr_in *)msg->msg_name;
if (sin) {
sin->sin_family = AF_INET;
sin->sin_port = inc->i_hdr.h_sport;
sin->sin_addr.s_addr = inc->i_saddr;
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
msg->msg_namelen = sizeof(*sin);
}
break;
}
if (inc)
rds_inc_put(inc);
out:
return ret;
} | 486 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rds_recvmsg | rds_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int msg_flags) | ['iocb', 'sock', 'msg', 'size', 'msg_flags'] | int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
size_t size, int msg_flags)
{
struct sock *sk = sock->sk;
struct rds_sock *rs = rds_sk_to_rs(sk);
long timeo;
int ret = 0, nonblock = msg_flags & MSG_DONTWAIT;
struct sockaddr_in *sin;
struct rds_incoming *inc = NULL;
/* udp_recvmsg()->sock_recvtimeo() gets away without locking too.. */
timeo = sock_rcvtimeo(sk, nonblock);
rdsdebug("size %zu flags 0x%x timeo %ld\n", size, msg_flags, timeo);
msg->msg_namelen = 0;
if (msg_flags & MSG_OOB)
goto out;
while (1) {
/* If there are pending notifications, do those - and nothing else */
if (!list_empty(&rs->rs_notify_queue)) {
ret = rds_notify_queue_get(rs, msg);
break;
}
if (rs->rs_cong_notify) {
ret = rds_notify_cong(rs, msg);
break;
}
if (!rds_next_incoming(rs, &inc)) {
if (nonblock) {
ret = -EAGAIN;
break;
}
timeo = wait_event_interruptible_timeout(*sk_sleep(sk),
(!list_empty(&rs->rs_notify_queue) ||
rs->rs_cong_notify ||
rds_next_incoming(rs, &inc)), timeo);
rdsdebug("recvmsg woke inc %p timeo %ld\n", inc,
timeo);
if (timeo > 0 || timeo == MAX_SCHEDULE_TIMEOUT)
continue;
ret = timeo;
if (ret == 0)
ret = -ETIMEDOUT;
break;
}
rdsdebug("copying inc %p from %pI4:%u to user\n", inc,
&inc->i_conn->c_faddr,
ntohs(inc->i_hdr.h_sport));
ret = inc->i_conn->c_trans->inc_copy_to_user(inc, msg->msg_iov,
size);
if (ret < 0)
break;
/*
* if the message we just copied isn't at the head of the
* recv queue then someone else raced us to return it, try
* to get the next message.
*/
if (!rds_still_queued(rs, inc, !(msg_flags & MSG_PEEK))) {
rds_inc_put(inc);
inc = NULL;
rds_stats_inc(s_recv_deliver_raced);
continue;
}
if (ret < be32_to_cpu(inc->i_hdr.h_len)) {
if (msg_flags & MSG_TRUNC)
ret = be32_to_cpu(inc->i_hdr.h_len);
msg->msg_flags |= MSG_TRUNC;
}
if (rds_cmsg_recv(inc, msg)) {
ret = -EFAULT;
goto out;
}
rds_stats_inc(s_recv_delivered);
sin = (struct sockaddr_in *)msg->msg_name;
if (sin) {
sin->sin_family = AF_INET;
sin->sin_port = inc->i_hdr.h_sport;
sin->sin_addr.s_addr = inc->i_saddr;
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
msg->msg_namelen = sizeof(*sin);
}
break;
}
if (inc)
rds_inc_put(inc);
out:
return ret;
} | 486 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rds_recvmsg | rds_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int msg_flags) | ['iocb', 'sock', 'msg', 'size', 'msg_flags'] | int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
size_t size, int msg_flags)
{
struct sock *sk = sock->sk;
struct rds_sock *rs = rds_sk_to_rs(sk);
long timeo;
int ret = 0, nonblock = msg_flags & MSG_DONTWAIT;
struct sockaddr_in *sin;
struct rds_incoming *inc = NULL;
/* udp_recvmsg()->sock_recvtimeo() gets away without locking too.. */
timeo = sock_rcvtimeo(sk, nonblock);
rdsdebug("size %zu flags 0x%x timeo %ld\n", size, msg_flags, timeo);
msg->msg_namelen = 0;
if (msg_flags & MSG_OOB)
goto out;
while (1) {
/* If there are pending notifications, do those - and nothing else */
if (!list_empty(&rs->rs_notify_queue)) {
ret = rds_notify_queue_get(rs, msg);
break;
}
if (rs->rs_cong_notify) {
ret = rds_notify_cong(rs, msg);
break;
}
if (!rds_next_incoming(rs, &inc)) {
if (nonblock) {
ret = -EAGAIN;
break;
}
timeo = wait_event_interruptible_timeout(*sk_sleep(sk),
(!list_empty(&rs->rs_notify_queue) ||
rs->rs_cong_notify ||
rds_next_incoming(rs, &inc)), timeo);
rdsdebug("recvmsg woke inc %p timeo %ld\n", inc,
timeo);
if (timeo > 0 || timeo == MAX_SCHEDULE_TIMEOUT)
continue;
ret = timeo;
if (ret == 0)
ret = -ETIMEDOUT;
break;
}
rdsdebug("copying inc %p from %pI4:%u to user\n", inc,
&inc->i_conn->c_faddr,
ntohs(inc->i_hdr.h_sport));
ret = inc->i_conn->c_trans->inc_copy_to_user(inc, msg->msg_iov,
size);
if (ret < 0)
break;
/*
* if the message we just copied isn't at the head of the
* recv queue then someone else raced us to return it, try
* to get the next message.
*/
if (!rds_still_queued(rs, inc, !(msg_flags & MSG_PEEK))) {
rds_inc_put(inc);
inc = NULL;
rds_stats_inc(s_recv_deliver_raced);
continue;
}
if (ret < be32_to_cpu(inc->i_hdr.h_len)) {
if (msg_flags & MSG_TRUNC)
ret = be32_to_cpu(inc->i_hdr.h_len);
msg->msg_flags |= MSG_TRUNC;
}
if (rds_cmsg_recv(inc, msg)) {
ret = -EFAULT;
goto out;
}
rds_stats_inc(s_recv_delivered);
sin = (struct sockaddr_in *)msg->msg_name;
if (sin) {
sin->sin_family = AF_INET;
sin->sin_port = inc->i_hdr.h_sport;
sin->sin_addr.s_addr = inc->i_saddr;
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
msg->msg_namelen = sizeof(*sin);
}
break;
}
if (inc)
rds_inc_put(inc);
out:
return ret;
} | 486 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rds_recvmsg | rds_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int msg_flags) | ['iocb', 'sock', 'msg', 'size', 'msg_flags'] | int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
size_t size, int msg_flags)
{
struct sock *sk = sock->sk;
struct rds_sock *rs = rds_sk_to_rs(sk);
long timeo;
int ret = 0, nonblock = msg_flags & MSG_DONTWAIT;
struct sockaddr_in *sin;
struct rds_incoming *inc = NULL;
/* udp_recvmsg()->sock_recvtimeo() gets away without locking too.. */
timeo = sock_rcvtimeo(sk, nonblock);
rdsdebug("size %zu flags 0x%x timeo %ld\n", size, msg_flags, timeo);
msg->msg_namelen = 0;
if (msg_flags & MSG_OOB)
goto out;
while (1) {
/* If there are pending notifications, do those - and nothing else */
if (!list_empty(&rs->rs_notify_queue)) {
ret = rds_notify_queue_get(rs, msg);
break;
}
if (rs->rs_cong_notify) {
ret = rds_notify_cong(rs, msg);
break;
}
if (!rds_next_incoming(rs, &inc)) {
if (nonblock) {
ret = -EAGAIN;
break;
}
timeo = wait_event_interruptible_timeout(*sk_sleep(sk),
(!list_empty(&rs->rs_notify_queue) ||
rs->rs_cong_notify ||
rds_next_incoming(rs, &inc)), timeo);
rdsdebug("recvmsg woke inc %p timeo %ld\n", inc,
timeo);
if (timeo > 0 || timeo == MAX_SCHEDULE_TIMEOUT)
continue;
ret = timeo;
if (ret == 0)
ret = -ETIMEDOUT;
break;
}
rdsdebug("copying inc %p from %pI4:%u to user\n", inc,
&inc->i_conn->c_faddr,
ntohs(inc->i_hdr.h_sport));
ret = inc->i_conn->c_trans->inc_copy_to_user(inc, msg->msg_iov,
size);
if (ret < 0)
break;
/*
* if the message we just copied isn't at the head of the
* recv queue then someone else raced us to return it, try
* to get the next message.
*/
if (!rds_still_queued(rs, inc, !(msg_flags & MSG_PEEK))) {
rds_inc_put(inc);
inc = NULL;
rds_stats_inc(s_recv_deliver_raced);
continue;
}
if (ret < be32_to_cpu(inc->i_hdr.h_len)) {
if (msg_flags & MSG_TRUNC)
ret = be32_to_cpu(inc->i_hdr.h_len);
msg->msg_flags |= MSG_TRUNC;
}
if (rds_cmsg_recv(inc, msg)) {
ret = -EFAULT;
goto out;
}
rds_stats_inc(s_recv_delivered);
sin = (struct sockaddr_in *)msg->msg_name;
if (sin) {
sin->sin_family = AF_INET;
sin->sin_port = inc->i_hdr.h_sport;
sin->sin_addr.s_addr = inc->i_saddr;
memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
msg->msg_namelen = sizeof(*sin);
}
break;
}
if (inc)
rds_inc_put(inc);
out:
return ret;
} | 486 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rose_recvmsg | rose_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags)
{
struct sock *sk = sock->sk;
struct rose_sock *rose = rose_sk(sk);
struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
size_t copied;
unsigned char *asmptr;
struct sk_buff *skb;
int n, er, qbit;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
return -ENOTCONN;
/* Now we can treat all alike */
if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
return er;
qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
skb_pull(skb, ROSE_MIN_LEN);
if (rose->qbitincl) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (srose != NULL) {
memset(srose, 0, msg->msg_namelen);
srose->srose_family = AF_ROSE;
srose->srose_addr = rose->dest_addr;
srose->srose_call = rose->dest_call;
srose->srose_ndigis = rose->dest_ndigis;
if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
for (n = 0 ; n < rose->dest_ndigis ; n++)
full_srose->srose_digis[n] = rose->dest_digis[n];
msg->msg_namelen = sizeof(struct full_sockaddr_rose);
} else {
if (rose->dest_ndigis >= 1) {
srose->srose_ndigis = 1;
srose->srose_digi = rose->dest_digis[0];
}
msg->msg_namelen = sizeof(struct sockaddr_rose);
}
}
skb_free_datagram(sk, skb);
return copied;
} | 369 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.44:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rose_recvmsg | rose_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags)
{
struct sock *sk = sock->sk;
struct rose_sock *rose = rose_sk(sk);
struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
size_t copied;
unsigned char *asmptr;
struct sk_buff *skb;
int n, er, qbit;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
return -ENOTCONN;
/* Now we can treat all alike */
if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
return er;
qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
skb_pull(skb, ROSE_MIN_LEN);
if (rose->qbitincl) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (srose != NULL) {
memset(srose, 0, msg->msg_namelen);
srose->srose_family = AF_ROSE;
srose->srose_addr = rose->dest_addr;
srose->srose_call = rose->dest_call;
srose->srose_ndigis = rose->dest_ndigis;
if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
for (n = 0 ; n < rose->dest_ndigis ; n++)
full_srose->srose_digis[n] = rose->dest_digis[n];
msg->msg_namelen = sizeof(struct full_sockaddr_rose);
} else {
if (rose->dest_ndigis >= 1) {
srose->srose_ndigis = 1;
srose->srose_digi = rose->dest_digis[0];
}
msg->msg_namelen = sizeof(struct sockaddr_rose);
}
}
skb_free_datagram(sk, skb);
return copied;
} | 369 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rose_recvmsg | rose_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags)
{
struct sock *sk = sock->sk;
struct rose_sock *rose = rose_sk(sk);
struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
size_t copied;
unsigned char *asmptr;
struct sk_buff *skb;
int n, er, qbit;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
return -ENOTCONN;
/* Now we can treat all alike */
if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
return er;
qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
skb_pull(skb, ROSE_MIN_LEN);
if (rose->qbitincl) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (srose != NULL) {
memset(srose, 0, msg->msg_namelen);
srose->srose_family = AF_ROSE;
srose->srose_addr = rose->dest_addr;
srose->srose_call = rose->dest_call;
srose->srose_ndigis = rose->dest_ndigis;
if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
for (n = 0 ; n < rose->dest_ndigis ; n++)
full_srose->srose_digis[n] = rose->dest_digis[n];
msg->msg_namelen = sizeof(struct full_sockaddr_rose);
} else {
if (rose->dest_ndigis >= 1) {
srose->srose_ndigis = 1;
srose->srose_digi = rose->dest_digis[0];
}
msg->msg_namelen = sizeof(struct sockaddr_rose);
}
}
skb_free_datagram(sk, skb);
return copied;
} | 369 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 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'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rose_recvmsg | rose_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags)
{
struct sock *sk = sock->sk;
struct rose_sock *rose = rose_sk(sk);
struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
size_t copied;
unsigned char *asmptr;
struct sk_buff *skb;
int n, er, qbit;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
return -ENOTCONN;
/* Now we can treat all alike */
if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
return er;
qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
skb_pull(skb, ROSE_MIN_LEN);
if (rose->qbitincl) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (srose != NULL) {
memset(srose, 0, msg->msg_namelen);
srose->srose_family = AF_ROSE;
srose->srose_addr = rose->dest_addr;
srose->srose_call = rose->dest_call;
srose->srose_ndigis = rose->dest_ndigis;
if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
for (n = 0 ; n < rose->dest_ndigis ; n++)
full_srose->srose_digis[n] = rose->dest_digis[n];
msg->msg_namelen = sizeof(struct full_sockaddr_rose);
} else {
if (rose->dest_ndigis >= 1) {
srose->srose_ndigis = 1;
srose->srose_digi = rose->dest_digis[0];
}
msg->msg_namelen = sizeof(struct sockaddr_rose);
}
}
skb_free_datagram(sk, skb);
return copied;
} | 369 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': 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'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.34:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.48:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.35:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.36:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.58:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.33:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.40:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.49:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.57:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.64:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.62:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.37:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rose_recvmsg | rose_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags)
{
struct sock *sk = sock->sk;
struct rose_sock *rose = rose_sk(sk);
struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
size_t copied;
unsigned char *asmptr;
struct sk_buff *skb;
int n, er, qbit;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
return -ENOTCONN;
/* Now we can treat all alike */
if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
return er;
qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
skb_pull(skb, ROSE_MIN_LEN);
if (rose->qbitincl) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (srose != NULL) {
memset(srose, 0, msg->msg_namelen);
srose->srose_family = AF_ROSE;
srose->srose_addr = rose->dest_addr;
srose->srose_call = rose->dest_call;
srose->srose_ndigis = rose->dest_ndigis;
if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
for (n = 0 ; n < rose->dest_ndigis ; n++)
full_srose->srose_digis[n] = rose->dest_digis[n];
msg->msg_namelen = sizeof(struct full_sockaddr_rose);
} else {
if (rose->dest_ndigis >= 1) {
srose->srose_ndigis = 1;
srose->srose_digi = rose->dest_digis[0];
}
msg->msg_namelen = sizeof(struct sockaddr_rose);
}
}
skb_free_datagram(sk, skb);
return copied;
} | 369 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rose_recvmsg | rose_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags)
{
struct sock *sk = sock->sk;
struct rose_sock *rose = rose_sk(sk);
struct sockaddr_rose *srose = (struct sockaddr_rose *)msg->msg_name;
size_t copied;
unsigned char *asmptr;
struct sk_buff *skb;
int n, er, qbit;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
return -ENOTCONN;
/* Now we can treat all alike */
if ((skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT, flags & MSG_DONTWAIT, &er)) == NULL)
return er;
qbit = (skb->data[0] & ROSE_Q_BIT) == ROSE_Q_BIT;
skb_pull(skb, ROSE_MIN_LEN);
if (rose->qbitincl) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (srose != NULL) {
memset(srose, 0, msg->msg_namelen);
srose->srose_family = AF_ROSE;
srose->srose_addr = rose->dest_addr;
srose->srose_call = rose->dest_call;
srose->srose_ndigis = rose->dest_ndigis;
if (msg->msg_namelen >= sizeof(struct full_sockaddr_rose)) {
struct full_sockaddr_rose *full_srose = (struct full_sockaddr_rose *)msg->msg_name;
for (n = 0 ; n < rose->dest_ndigis ; n++)
full_srose->srose_digis[n] = rose->dest_digis[n];
msg->msg_namelen = sizeof(struct full_sockaddr_rose);
} else {
if (rose->dest_ndigis >= 1) {
srose->srose_ndigis = 1;
srose->srose_digi = rose->dest_digis[0];
}
msg->msg_namelen = sizeof(struct sockaddr_rose);
}
}
skb_free_datagram(sk, skb);
return copied;
} | 369 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 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'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.44:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.45:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rxrpc_recvmsg | rxrpc_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | int rxrpc_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct rxrpc_skb_priv *sp;
struct rxrpc_call *call = NULL, *continue_call = NULL;
struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
struct sk_buff *skb;
long timeo;
int copy, ret, ullen, offset, copied = 0;
u32 abort_code;
DEFINE_WAIT(wait);
_enter(",,,%zu,%d", len, flags);
if (flags & (MSG_OOB | MSG_TRUNC))
return -EOPNOTSUPP;
ullen = msg->msg_flags & MSG_CMSG_COMPAT ? 4 : sizeof(unsigned long);
timeo = sock_rcvtimeo(&rx->sk, flags & MSG_DONTWAIT);
msg->msg_flags |= MSG_MORE;
lock_sock(&rx->sk);
for (;;) {
/* return immediately if a client socket has no outstanding
* calls */
if (RB_EMPTY_ROOT(&rx->calls)) {
if (copied)
goto out;
if (rx->sk.sk_state != RXRPC_SERVER_LISTENING) {
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
return -ENODATA;
}
}
/* get the next message on the Rx queue */
skb = skb_peek(&rx->sk.sk_receive_queue);
if (!skb) {
/* nothing remains on the queue */
if (copied &&
(msg->msg_flags & MSG_PEEK || timeo == 0))
goto out;
/* wait for a message to turn up */
release_sock(&rx->sk);
prepare_to_wait_exclusive(sk_sleep(&rx->sk), &wait,
TASK_INTERRUPTIBLE);
ret = sock_error(&rx->sk);
if (ret)
goto wait_error;
if (skb_queue_empty(&rx->sk.sk_receive_queue)) {
if (signal_pending(current))
goto wait_interrupted;
timeo = schedule_timeout(timeo);
}
finish_wait(sk_sleep(&rx->sk), &wait);
lock_sock(&rx->sk);
continue;
}
peek_next_packet:
sp = rxrpc_skb(skb);
call = sp->call;
ASSERT(call != NULL);
_debug("next pkt %s", rxrpc_pkts[sp->hdr.type]);
/* make sure we wait for the state to be updated in this call */
spin_lock_bh(&call->lock);
spin_unlock_bh(&call->lock);
if (test_bit(RXRPC_CALL_RELEASED, &call->flags)) {
_debug("packet from released call");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
continue;
}
/* determine whether to continue last data receive */
if (continue_call) {
_debug("maybe cont");
if (call != continue_call ||
skb->mark != RXRPC_SKB_MARK_DATA) {
release_sock(&rx->sk);
rxrpc_put_call(continue_call);
_leave(" = %d [noncont]", copied);
return copied;
}
}
rxrpc_get_call(call);
/* copy the peer address and timestamp */
if (!continue_call) {
if (msg->msg_name && msg->msg_namelen > 0)
memcpy(msg->msg_name,
&call->conn->trans->peer->srx,
sizeof(call->conn->trans->peer->srx));
sock_recv_ts_and_drops(msg, &rx->sk, skb);
}
/* receive the message */
if (skb->mark != RXRPC_SKB_MARK_DATA)
goto receive_non_data_message;
_debug("recvmsg DATA #%u { %d, %d }",
ntohl(sp->hdr.seq), skb->len, sp->offset);
if (!continue_call) {
/* only set the control data once per recvmsg() */
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
}
ASSERTCMP(ntohl(sp->hdr.seq), >=, call->rx_data_recv);
ASSERTCMP(ntohl(sp->hdr.seq), <=, call->rx_data_recv + 1);
call->rx_data_recv = ntohl(sp->hdr.seq);
ASSERTCMP(ntohl(sp->hdr.seq), >, call->rx_data_eaten);
offset = sp->offset;
copy = skb->len - offset;
if (copy > len - copied)
copy = len - copied;
if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
ret = skb_copy_datagram_iovec(skb, offset,
msg->msg_iov, copy);
} else {
ret = skb_copy_and_csum_datagram_iovec(skb, offset,
msg->msg_iov);
if (ret == -EINVAL)
goto csum_copy_error;
}
if (ret < 0)
goto copy_error;
/* handle piecemeal consumption of data packets */
_debug("copied %d+%d", copy, copied);
offset += copy;
copied += copy;
if (!(flags & MSG_PEEK))
sp->offset = offset;
if (sp->offset < skb->len) {
_debug("buffer full");
ASSERTCMP(copied, ==, len);
break;
}
/* we transferred the whole data packet */
if (sp->hdr.flags & RXRPC_LAST_PACKET) {
_debug("last");
if (call->conn->out_clientflag) {
/* last byte of reply received */
ret = copied;
goto terminal_message;
}
/* last bit of request received */
if (!(flags & MSG_PEEK)) {
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) !=
skb)
BUG();
rxrpc_free_skb(skb);
}
msg->msg_flags &= ~MSG_MORE;
break;
}
/* move on to the next data message */
_debug("next");
if (!continue_call)
continue_call = sp->call;
else
rxrpc_put_call(call);
call = NULL;
if (flags & MSG_PEEK) {
_debug("peek next");
skb = skb->next;
if (skb == (struct sk_buff *) &rx->sk.sk_receive_queue)
break;
goto peek_next_packet;
}
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
/* end of non-terminal data packet reception for the moment */
_debug("end rcv data");
out:
release_sock(&rx->sk);
if (call)
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d [data]", copied);
return copied;
/* handle non-DATA messages such as aborts, incoming connections and
* final ACKs */
receive_non_data_message:
_debug("non-data");
if (skb->mark == RXRPC_SKB_MARK_NEW_CALL) {
_debug("RECV NEW CALL");
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NEW_CALL, 0, &abort_code);
if (ret < 0)
goto copy_error;
if (!(flags & MSG_PEEK)) {
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
goto out;
}
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
switch (skb->mark) {
case RXRPC_SKB_MARK_DATA:
BUG();
case RXRPC_SKB_MARK_FINAL_ACK:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ACK, 0, &abort_code);
break;
case RXRPC_SKB_MARK_BUSY:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_BUSY, 0, &abort_code);
break;
case RXRPC_SKB_MARK_REMOTE_ABORT:
abort_code = call->abort_code;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ABORT, 4, &abort_code);
break;
case RXRPC_SKB_MARK_NET_ERROR:
_debug("RECV NET ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NET_ERROR, 4, &abort_code);
break;
case RXRPC_SKB_MARK_LOCAL_ERROR:
_debug("RECV LOCAL ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_LOCAL_ERROR, 4,
&abort_code);
break;
default:
BUG();
break;
}
if (ret < 0)
goto copy_error;
terminal_message:
_debug("terminal");
msg->msg_flags &= ~MSG_MORE;
msg->msg_flags |= MSG_EOR;
if (!(flags & MSG_PEEK)) {
_net("free terminal skb %p", skb);
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
rxrpc_remove_user_ID(rx, call);
}
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
copy_error:
_debug("copy error");
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
csum_copy_error:
_debug("csum error");
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
rxrpc_kill_skb(skb);
skb_kill_datagram(&rx->sk, skb, flags);
rxrpc_put_call(call);
return -EAGAIN;
wait_interrupted:
ret = sock_intr_errno(timeo);
wait_error:
finish_wait(sk_sleep(&rx->sk), &wait);
if (continue_call)
rxrpc_put_call(continue_call);
if (copied)
copied = ret;
_leave(" = %d [waitfail %d]", copied, ret);
return copied;
} | 1608 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.34:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.48:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.35:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.36:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.58:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.40:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.33:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.42:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.49:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.57:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.64:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.37:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.62:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.6:*:*:*:*:*:*:*', 'cpe_name': []}, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.44:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rxrpc_recvmsg | rxrpc_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | int rxrpc_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct rxrpc_skb_priv *sp;
struct rxrpc_call *call = NULL, *continue_call = NULL;
struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
struct sk_buff *skb;
long timeo;
int copy, ret, ullen, offset, copied = 0;
u32 abort_code;
DEFINE_WAIT(wait);
_enter(",,,%zu,%d", len, flags);
if (flags & (MSG_OOB | MSG_TRUNC))
return -EOPNOTSUPP;
ullen = msg->msg_flags & MSG_CMSG_COMPAT ? 4 : sizeof(unsigned long);
timeo = sock_rcvtimeo(&rx->sk, flags & MSG_DONTWAIT);
msg->msg_flags |= MSG_MORE;
lock_sock(&rx->sk);
for (;;) {
/* return immediately if a client socket has no outstanding
* calls */
if (RB_EMPTY_ROOT(&rx->calls)) {
if (copied)
goto out;
if (rx->sk.sk_state != RXRPC_SERVER_LISTENING) {
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
return -ENODATA;
}
}
/* get the next message on the Rx queue */
skb = skb_peek(&rx->sk.sk_receive_queue);
if (!skb) {
/* nothing remains on the queue */
if (copied &&
(msg->msg_flags & MSG_PEEK || timeo == 0))
goto out;
/* wait for a message to turn up */
release_sock(&rx->sk);
prepare_to_wait_exclusive(sk_sleep(&rx->sk), &wait,
TASK_INTERRUPTIBLE);
ret = sock_error(&rx->sk);
if (ret)
goto wait_error;
if (skb_queue_empty(&rx->sk.sk_receive_queue)) {
if (signal_pending(current))
goto wait_interrupted;
timeo = schedule_timeout(timeo);
}
finish_wait(sk_sleep(&rx->sk), &wait);
lock_sock(&rx->sk);
continue;
}
peek_next_packet:
sp = rxrpc_skb(skb);
call = sp->call;
ASSERT(call != NULL);
_debug("next pkt %s", rxrpc_pkts[sp->hdr.type]);
/* make sure we wait for the state to be updated in this call */
spin_lock_bh(&call->lock);
spin_unlock_bh(&call->lock);
if (test_bit(RXRPC_CALL_RELEASED, &call->flags)) {
_debug("packet from released call");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
continue;
}
/* determine whether to continue last data receive */
if (continue_call) {
_debug("maybe cont");
if (call != continue_call ||
skb->mark != RXRPC_SKB_MARK_DATA) {
release_sock(&rx->sk);
rxrpc_put_call(continue_call);
_leave(" = %d [noncont]", copied);
return copied;
}
}
rxrpc_get_call(call);
/* copy the peer address and timestamp */
if (!continue_call) {
if (msg->msg_name && msg->msg_namelen > 0)
memcpy(msg->msg_name,
&call->conn->trans->peer->srx,
sizeof(call->conn->trans->peer->srx));
sock_recv_ts_and_drops(msg, &rx->sk, skb);
}
/* receive the message */
if (skb->mark != RXRPC_SKB_MARK_DATA)
goto receive_non_data_message;
_debug("recvmsg DATA #%u { %d, %d }",
ntohl(sp->hdr.seq), skb->len, sp->offset);
if (!continue_call) {
/* only set the control data once per recvmsg() */
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
}
ASSERTCMP(ntohl(sp->hdr.seq), >=, call->rx_data_recv);
ASSERTCMP(ntohl(sp->hdr.seq), <=, call->rx_data_recv + 1);
call->rx_data_recv = ntohl(sp->hdr.seq);
ASSERTCMP(ntohl(sp->hdr.seq), >, call->rx_data_eaten);
offset = sp->offset;
copy = skb->len - offset;
if (copy > len - copied)
copy = len - copied;
if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
ret = skb_copy_datagram_iovec(skb, offset,
msg->msg_iov, copy);
} else {
ret = skb_copy_and_csum_datagram_iovec(skb, offset,
msg->msg_iov);
if (ret == -EINVAL)
goto csum_copy_error;
}
if (ret < 0)
goto copy_error;
/* handle piecemeal consumption of data packets */
_debug("copied %d+%d", copy, copied);
offset += copy;
copied += copy;
if (!(flags & MSG_PEEK))
sp->offset = offset;
if (sp->offset < skb->len) {
_debug("buffer full");
ASSERTCMP(copied, ==, len);
break;
}
/* we transferred the whole data packet */
if (sp->hdr.flags & RXRPC_LAST_PACKET) {
_debug("last");
if (call->conn->out_clientflag) {
/* last byte of reply received */
ret = copied;
goto terminal_message;
}
/* last bit of request received */
if (!(flags & MSG_PEEK)) {
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) !=
skb)
BUG();
rxrpc_free_skb(skb);
}
msg->msg_flags &= ~MSG_MORE;
break;
}
/* move on to the next data message */
_debug("next");
if (!continue_call)
continue_call = sp->call;
else
rxrpc_put_call(call);
call = NULL;
if (flags & MSG_PEEK) {
_debug("peek next");
skb = skb->next;
if (skb == (struct sk_buff *) &rx->sk.sk_receive_queue)
break;
goto peek_next_packet;
}
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
/* end of non-terminal data packet reception for the moment */
_debug("end rcv data");
out:
release_sock(&rx->sk);
if (call)
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d [data]", copied);
return copied;
/* handle non-DATA messages such as aborts, incoming connections and
* final ACKs */
receive_non_data_message:
_debug("non-data");
if (skb->mark == RXRPC_SKB_MARK_NEW_CALL) {
_debug("RECV NEW CALL");
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NEW_CALL, 0, &abort_code);
if (ret < 0)
goto copy_error;
if (!(flags & MSG_PEEK)) {
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
goto out;
}
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
switch (skb->mark) {
case RXRPC_SKB_MARK_DATA:
BUG();
case RXRPC_SKB_MARK_FINAL_ACK:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ACK, 0, &abort_code);
break;
case RXRPC_SKB_MARK_BUSY:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_BUSY, 0, &abort_code);
break;
case RXRPC_SKB_MARK_REMOTE_ABORT:
abort_code = call->abort_code;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ABORT, 4, &abort_code);
break;
case RXRPC_SKB_MARK_NET_ERROR:
_debug("RECV NET ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NET_ERROR, 4, &abort_code);
break;
case RXRPC_SKB_MARK_LOCAL_ERROR:
_debug("RECV LOCAL ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_LOCAL_ERROR, 4,
&abort_code);
break;
default:
BUG();
break;
}
if (ret < 0)
goto copy_error;
terminal_message:
_debug("terminal");
msg->msg_flags &= ~MSG_MORE;
msg->msg_flags |= MSG_EOR;
if (!(flags & MSG_PEEK)) {
_net("free terminal skb %p", skb);
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
rxrpc_remove_user_ID(rx, call);
}
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
copy_error:
_debug("copy error");
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
csum_copy_error:
_debug("csum error");
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
rxrpc_kill_skb(skb);
skb_kill_datagram(&rx->sk, skb, flags);
rxrpc_put_call(call);
return -EAGAIN;
wait_interrupted:
ret = sock_intr_errno(timeo);
wait_error:
finish_wait(sk_sleep(&rx->sk), &wait);
if (continue_call)
rxrpc_put_call(continue_call);
if (copied)
copied = ret;
_leave(" = %d [waitfail %d]", copied, ret);
return copied;
} | 1608 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rxrpc_recvmsg | rxrpc_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | int rxrpc_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct rxrpc_skb_priv *sp;
struct rxrpc_call *call = NULL, *continue_call = NULL;
struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
struct sk_buff *skb;
long timeo;
int copy, ret, ullen, offset, copied = 0;
u32 abort_code;
DEFINE_WAIT(wait);
_enter(",,,%zu,%d", len, flags);
if (flags & (MSG_OOB | MSG_TRUNC))
return -EOPNOTSUPP;
ullen = msg->msg_flags & MSG_CMSG_COMPAT ? 4 : sizeof(unsigned long);
timeo = sock_rcvtimeo(&rx->sk, flags & MSG_DONTWAIT);
msg->msg_flags |= MSG_MORE;
lock_sock(&rx->sk);
for (;;) {
/* return immediately if a client socket has no outstanding
* calls */
if (RB_EMPTY_ROOT(&rx->calls)) {
if (copied)
goto out;
if (rx->sk.sk_state != RXRPC_SERVER_LISTENING) {
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
return -ENODATA;
}
}
/* get the next message on the Rx queue */
skb = skb_peek(&rx->sk.sk_receive_queue);
if (!skb) {
/* nothing remains on the queue */
if (copied &&
(msg->msg_flags & MSG_PEEK || timeo == 0))
goto out;
/* wait for a message to turn up */
release_sock(&rx->sk);
prepare_to_wait_exclusive(sk_sleep(&rx->sk), &wait,
TASK_INTERRUPTIBLE);
ret = sock_error(&rx->sk);
if (ret)
goto wait_error;
if (skb_queue_empty(&rx->sk.sk_receive_queue)) {
if (signal_pending(current))
goto wait_interrupted;
timeo = schedule_timeout(timeo);
}
finish_wait(sk_sleep(&rx->sk), &wait);
lock_sock(&rx->sk);
continue;
}
peek_next_packet:
sp = rxrpc_skb(skb);
call = sp->call;
ASSERT(call != NULL);
_debug("next pkt %s", rxrpc_pkts[sp->hdr.type]);
/* make sure we wait for the state to be updated in this call */
spin_lock_bh(&call->lock);
spin_unlock_bh(&call->lock);
if (test_bit(RXRPC_CALL_RELEASED, &call->flags)) {
_debug("packet from released call");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
continue;
}
/* determine whether to continue last data receive */
if (continue_call) {
_debug("maybe cont");
if (call != continue_call ||
skb->mark != RXRPC_SKB_MARK_DATA) {
release_sock(&rx->sk);
rxrpc_put_call(continue_call);
_leave(" = %d [noncont]", copied);
return copied;
}
}
rxrpc_get_call(call);
/* copy the peer address and timestamp */
if (!continue_call) {
if (msg->msg_name && msg->msg_namelen > 0)
memcpy(msg->msg_name,
&call->conn->trans->peer->srx,
sizeof(call->conn->trans->peer->srx));
sock_recv_ts_and_drops(msg, &rx->sk, skb);
}
/* receive the message */
if (skb->mark != RXRPC_SKB_MARK_DATA)
goto receive_non_data_message;
_debug("recvmsg DATA #%u { %d, %d }",
ntohl(sp->hdr.seq), skb->len, sp->offset);
if (!continue_call) {
/* only set the control data once per recvmsg() */
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
}
ASSERTCMP(ntohl(sp->hdr.seq), >=, call->rx_data_recv);
ASSERTCMP(ntohl(sp->hdr.seq), <=, call->rx_data_recv + 1);
call->rx_data_recv = ntohl(sp->hdr.seq);
ASSERTCMP(ntohl(sp->hdr.seq), >, call->rx_data_eaten);
offset = sp->offset;
copy = skb->len - offset;
if (copy > len - copied)
copy = len - copied;
if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
ret = skb_copy_datagram_iovec(skb, offset,
msg->msg_iov, copy);
} else {
ret = skb_copy_and_csum_datagram_iovec(skb, offset,
msg->msg_iov);
if (ret == -EINVAL)
goto csum_copy_error;
}
if (ret < 0)
goto copy_error;
/* handle piecemeal consumption of data packets */
_debug("copied %d+%d", copy, copied);
offset += copy;
copied += copy;
if (!(flags & MSG_PEEK))
sp->offset = offset;
if (sp->offset < skb->len) {
_debug("buffer full");
ASSERTCMP(copied, ==, len);
break;
}
/* we transferred the whole data packet */
if (sp->hdr.flags & RXRPC_LAST_PACKET) {
_debug("last");
if (call->conn->out_clientflag) {
/* last byte of reply received */
ret = copied;
goto terminal_message;
}
/* last bit of request received */
if (!(flags & MSG_PEEK)) {
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) !=
skb)
BUG();
rxrpc_free_skb(skb);
}
msg->msg_flags &= ~MSG_MORE;
break;
}
/* move on to the next data message */
_debug("next");
if (!continue_call)
continue_call = sp->call;
else
rxrpc_put_call(call);
call = NULL;
if (flags & MSG_PEEK) {
_debug("peek next");
skb = skb->next;
if (skb == (struct sk_buff *) &rx->sk.sk_receive_queue)
break;
goto peek_next_packet;
}
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
/* end of non-terminal data packet reception for the moment */
_debug("end rcv data");
out:
release_sock(&rx->sk);
if (call)
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d [data]", copied);
return copied;
/* handle non-DATA messages such as aborts, incoming connections and
* final ACKs */
receive_non_data_message:
_debug("non-data");
if (skb->mark == RXRPC_SKB_MARK_NEW_CALL) {
_debug("RECV NEW CALL");
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NEW_CALL, 0, &abort_code);
if (ret < 0)
goto copy_error;
if (!(flags & MSG_PEEK)) {
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
goto out;
}
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
switch (skb->mark) {
case RXRPC_SKB_MARK_DATA:
BUG();
case RXRPC_SKB_MARK_FINAL_ACK:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ACK, 0, &abort_code);
break;
case RXRPC_SKB_MARK_BUSY:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_BUSY, 0, &abort_code);
break;
case RXRPC_SKB_MARK_REMOTE_ABORT:
abort_code = call->abort_code;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ABORT, 4, &abort_code);
break;
case RXRPC_SKB_MARK_NET_ERROR:
_debug("RECV NET ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NET_ERROR, 4, &abort_code);
break;
case RXRPC_SKB_MARK_LOCAL_ERROR:
_debug("RECV LOCAL ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_LOCAL_ERROR, 4,
&abort_code);
break;
default:
BUG();
break;
}
if (ret < 0)
goto copy_error;
terminal_message:
_debug("terminal");
msg->msg_flags &= ~MSG_MORE;
msg->msg_flags |= MSG_EOR;
if (!(flags & MSG_PEEK)) {
_net("free terminal skb %p", skb);
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
rxrpc_remove_user_ID(rx, call);
}
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
copy_error:
_debug("copy error");
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
csum_copy_error:
_debug("csum error");
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
rxrpc_kill_skb(skb);
skb_kill_datagram(&rx->sk, skb, flags);
rxrpc_put_call(call);
return -EAGAIN;
wait_interrupted:
ret = sock_intr_errno(timeo);
wait_error:
finish_wait(sk_sleep(&rx->sk), &wait);
if (continue_call)
rxrpc_put_call(continue_call);
if (copied)
copied = ret;
_leave(" = %d [waitfail %d]", copied, ret);
return copied;
} | 1608 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rxrpc_recvmsg | rxrpc_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | int rxrpc_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct rxrpc_skb_priv *sp;
struct rxrpc_call *call = NULL, *continue_call = NULL;
struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
struct sk_buff *skb;
long timeo;
int copy, ret, ullen, offset, copied = 0;
u32 abort_code;
DEFINE_WAIT(wait);
_enter(",,,%zu,%d", len, flags);
if (flags & (MSG_OOB | MSG_TRUNC))
return -EOPNOTSUPP;
ullen = msg->msg_flags & MSG_CMSG_COMPAT ? 4 : sizeof(unsigned long);
timeo = sock_rcvtimeo(&rx->sk, flags & MSG_DONTWAIT);
msg->msg_flags |= MSG_MORE;
lock_sock(&rx->sk);
for (;;) {
/* return immediately if a client socket has no outstanding
* calls */
if (RB_EMPTY_ROOT(&rx->calls)) {
if (copied)
goto out;
if (rx->sk.sk_state != RXRPC_SERVER_LISTENING) {
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
return -ENODATA;
}
}
/* get the next message on the Rx queue */
skb = skb_peek(&rx->sk.sk_receive_queue);
if (!skb) {
/* nothing remains on the queue */
if (copied &&
(msg->msg_flags & MSG_PEEK || timeo == 0))
goto out;
/* wait for a message to turn up */
release_sock(&rx->sk);
prepare_to_wait_exclusive(sk_sleep(&rx->sk), &wait,
TASK_INTERRUPTIBLE);
ret = sock_error(&rx->sk);
if (ret)
goto wait_error;
if (skb_queue_empty(&rx->sk.sk_receive_queue)) {
if (signal_pending(current))
goto wait_interrupted;
timeo = schedule_timeout(timeo);
}
finish_wait(sk_sleep(&rx->sk), &wait);
lock_sock(&rx->sk);
continue;
}
peek_next_packet:
sp = rxrpc_skb(skb);
call = sp->call;
ASSERT(call != NULL);
_debug("next pkt %s", rxrpc_pkts[sp->hdr.type]);
/* make sure we wait for the state to be updated in this call */
spin_lock_bh(&call->lock);
spin_unlock_bh(&call->lock);
if (test_bit(RXRPC_CALL_RELEASED, &call->flags)) {
_debug("packet from released call");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
continue;
}
/* determine whether to continue last data receive */
if (continue_call) {
_debug("maybe cont");
if (call != continue_call ||
skb->mark != RXRPC_SKB_MARK_DATA) {
release_sock(&rx->sk);
rxrpc_put_call(continue_call);
_leave(" = %d [noncont]", copied);
return copied;
}
}
rxrpc_get_call(call);
/* copy the peer address and timestamp */
if (!continue_call) {
if (msg->msg_name && msg->msg_namelen > 0)
memcpy(msg->msg_name,
&call->conn->trans->peer->srx,
sizeof(call->conn->trans->peer->srx));
sock_recv_ts_and_drops(msg, &rx->sk, skb);
}
/* receive the message */
if (skb->mark != RXRPC_SKB_MARK_DATA)
goto receive_non_data_message;
_debug("recvmsg DATA #%u { %d, %d }",
ntohl(sp->hdr.seq), skb->len, sp->offset);
if (!continue_call) {
/* only set the control data once per recvmsg() */
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
}
ASSERTCMP(ntohl(sp->hdr.seq), >=, call->rx_data_recv);
ASSERTCMP(ntohl(sp->hdr.seq), <=, call->rx_data_recv + 1);
call->rx_data_recv = ntohl(sp->hdr.seq);
ASSERTCMP(ntohl(sp->hdr.seq), >, call->rx_data_eaten);
offset = sp->offset;
copy = skb->len - offset;
if (copy > len - copied)
copy = len - copied;
if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
ret = skb_copy_datagram_iovec(skb, offset,
msg->msg_iov, copy);
} else {
ret = skb_copy_and_csum_datagram_iovec(skb, offset,
msg->msg_iov);
if (ret == -EINVAL)
goto csum_copy_error;
}
if (ret < 0)
goto copy_error;
/* handle piecemeal consumption of data packets */
_debug("copied %d+%d", copy, copied);
offset += copy;
copied += copy;
if (!(flags & MSG_PEEK))
sp->offset = offset;
if (sp->offset < skb->len) {
_debug("buffer full");
ASSERTCMP(copied, ==, len);
break;
}
/* we transferred the whole data packet */
if (sp->hdr.flags & RXRPC_LAST_PACKET) {
_debug("last");
if (call->conn->out_clientflag) {
/* last byte of reply received */
ret = copied;
goto terminal_message;
}
/* last bit of request received */
if (!(flags & MSG_PEEK)) {
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) !=
skb)
BUG();
rxrpc_free_skb(skb);
}
msg->msg_flags &= ~MSG_MORE;
break;
}
/* move on to the next data message */
_debug("next");
if (!continue_call)
continue_call = sp->call;
else
rxrpc_put_call(call);
call = NULL;
if (flags & MSG_PEEK) {
_debug("peek next");
skb = skb->next;
if (skb == (struct sk_buff *) &rx->sk.sk_receive_queue)
break;
goto peek_next_packet;
}
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
/* end of non-terminal data packet reception for the moment */
_debug("end rcv data");
out:
release_sock(&rx->sk);
if (call)
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d [data]", copied);
return copied;
/* handle non-DATA messages such as aborts, incoming connections and
* final ACKs */
receive_non_data_message:
_debug("non-data");
if (skb->mark == RXRPC_SKB_MARK_NEW_CALL) {
_debug("RECV NEW CALL");
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NEW_CALL, 0, &abort_code);
if (ret < 0)
goto copy_error;
if (!(flags & MSG_PEEK)) {
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
goto out;
}
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
switch (skb->mark) {
case RXRPC_SKB_MARK_DATA:
BUG();
case RXRPC_SKB_MARK_FINAL_ACK:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ACK, 0, &abort_code);
break;
case RXRPC_SKB_MARK_BUSY:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_BUSY, 0, &abort_code);
break;
case RXRPC_SKB_MARK_REMOTE_ABORT:
abort_code = call->abort_code;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ABORT, 4, &abort_code);
break;
case RXRPC_SKB_MARK_NET_ERROR:
_debug("RECV NET ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NET_ERROR, 4, &abort_code);
break;
case RXRPC_SKB_MARK_LOCAL_ERROR:
_debug("RECV LOCAL ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_LOCAL_ERROR, 4,
&abort_code);
break;
default:
BUG();
break;
}
if (ret < 0)
goto copy_error;
terminal_message:
_debug("terminal");
msg->msg_flags &= ~MSG_MORE;
msg->msg_flags |= MSG_EOR;
if (!(flags & MSG_PEEK)) {
_net("free terminal skb %p", skb);
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
rxrpc_remove_user_ID(rx, call);
}
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
copy_error:
_debug("copy error");
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
csum_copy_error:
_debug("csum error");
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
rxrpc_kill_skb(skb);
skb_kill_datagram(&rx->sk, skb, flags);
rxrpc_put_call(call);
return -EAGAIN;
wait_interrupted:
ret = sock_intr_errno(timeo);
wait_error:
finish_wait(sk_sleep(&rx->sk), &wait);
if (continue_call)
rxrpc_put_call(continue_call);
if (copied)
copied = ret;
_leave(" = %d [waitfail %d]", copied, ret);
return copied;
} | 1608 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rxrpc_recvmsg | rxrpc_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | int rxrpc_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct rxrpc_skb_priv *sp;
struct rxrpc_call *call = NULL, *continue_call = NULL;
struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
struct sk_buff *skb;
long timeo;
int copy, ret, ullen, offset, copied = 0;
u32 abort_code;
DEFINE_WAIT(wait);
_enter(",,,%zu,%d", len, flags);
if (flags & (MSG_OOB | MSG_TRUNC))
return -EOPNOTSUPP;
ullen = msg->msg_flags & MSG_CMSG_COMPAT ? 4 : sizeof(unsigned long);
timeo = sock_rcvtimeo(&rx->sk, flags & MSG_DONTWAIT);
msg->msg_flags |= MSG_MORE;
lock_sock(&rx->sk);
for (;;) {
/* return immediately if a client socket has no outstanding
* calls */
if (RB_EMPTY_ROOT(&rx->calls)) {
if (copied)
goto out;
if (rx->sk.sk_state != RXRPC_SERVER_LISTENING) {
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
return -ENODATA;
}
}
/* get the next message on the Rx queue */
skb = skb_peek(&rx->sk.sk_receive_queue);
if (!skb) {
/* nothing remains on the queue */
if (copied &&
(msg->msg_flags & MSG_PEEK || timeo == 0))
goto out;
/* wait for a message to turn up */
release_sock(&rx->sk);
prepare_to_wait_exclusive(sk_sleep(&rx->sk), &wait,
TASK_INTERRUPTIBLE);
ret = sock_error(&rx->sk);
if (ret)
goto wait_error;
if (skb_queue_empty(&rx->sk.sk_receive_queue)) {
if (signal_pending(current))
goto wait_interrupted;
timeo = schedule_timeout(timeo);
}
finish_wait(sk_sleep(&rx->sk), &wait);
lock_sock(&rx->sk);
continue;
}
peek_next_packet:
sp = rxrpc_skb(skb);
call = sp->call;
ASSERT(call != NULL);
_debug("next pkt %s", rxrpc_pkts[sp->hdr.type]);
/* make sure we wait for the state to be updated in this call */
spin_lock_bh(&call->lock);
spin_unlock_bh(&call->lock);
if (test_bit(RXRPC_CALL_RELEASED, &call->flags)) {
_debug("packet from released call");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
continue;
}
/* determine whether to continue last data receive */
if (continue_call) {
_debug("maybe cont");
if (call != continue_call ||
skb->mark != RXRPC_SKB_MARK_DATA) {
release_sock(&rx->sk);
rxrpc_put_call(continue_call);
_leave(" = %d [noncont]", copied);
return copied;
}
}
rxrpc_get_call(call);
/* copy the peer address and timestamp */
if (!continue_call) {
if (msg->msg_name && msg->msg_namelen > 0)
memcpy(msg->msg_name,
&call->conn->trans->peer->srx,
sizeof(call->conn->trans->peer->srx));
sock_recv_ts_and_drops(msg, &rx->sk, skb);
}
/* receive the message */
if (skb->mark != RXRPC_SKB_MARK_DATA)
goto receive_non_data_message;
_debug("recvmsg DATA #%u { %d, %d }",
ntohl(sp->hdr.seq), skb->len, sp->offset);
if (!continue_call) {
/* only set the control data once per recvmsg() */
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
}
ASSERTCMP(ntohl(sp->hdr.seq), >=, call->rx_data_recv);
ASSERTCMP(ntohl(sp->hdr.seq), <=, call->rx_data_recv + 1);
call->rx_data_recv = ntohl(sp->hdr.seq);
ASSERTCMP(ntohl(sp->hdr.seq), >, call->rx_data_eaten);
offset = sp->offset;
copy = skb->len - offset;
if (copy > len - copied)
copy = len - copied;
if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
ret = skb_copy_datagram_iovec(skb, offset,
msg->msg_iov, copy);
} else {
ret = skb_copy_and_csum_datagram_iovec(skb, offset,
msg->msg_iov);
if (ret == -EINVAL)
goto csum_copy_error;
}
if (ret < 0)
goto copy_error;
/* handle piecemeal consumption of data packets */
_debug("copied %d+%d", copy, copied);
offset += copy;
copied += copy;
if (!(flags & MSG_PEEK))
sp->offset = offset;
if (sp->offset < skb->len) {
_debug("buffer full");
ASSERTCMP(copied, ==, len);
break;
}
/* we transferred the whole data packet */
if (sp->hdr.flags & RXRPC_LAST_PACKET) {
_debug("last");
if (call->conn->out_clientflag) {
/* last byte of reply received */
ret = copied;
goto terminal_message;
}
/* last bit of request received */
if (!(flags & MSG_PEEK)) {
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) !=
skb)
BUG();
rxrpc_free_skb(skb);
}
msg->msg_flags &= ~MSG_MORE;
break;
}
/* move on to the next data message */
_debug("next");
if (!continue_call)
continue_call = sp->call;
else
rxrpc_put_call(call);
call = NULL;
if (flags & MSG_PEEK) {
_debug("peek next");
skb = skb->next;
if (skb == (struct sk_buff *) &rx->sk.sk_receive_queue)
break;
goto peek_next_packet;
}
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
/* end of non-terminal data packet reception for the moment */
_debug("end rcv data");
out:
release_sock(&rx->sk);
if (call)
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d [data]", copied);
return copied;
/* handle non-DATA messages such as aborts, incoming connections and
* final ACKs */
receive_non_data_message:
_debug("non-data");
if (skb->mark == RXRPC_SKB_MARK_NEW_CALL) {
_debug("RECV NEW CALL");
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NEW_CALL, 0, &abort_code);
if (ret < 0)
goto copy_error;
if (!(flags & MSG_PEEK)) {
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
goto out;
}
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
switch (skb->mark) {
case RXRPC_SKB_MARK_DATA:
BUG();
case RXRPC_SKB_MARK_FINAL_ACK:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ACK, 0, &abort_code);
break;
case RXRPC_SKB_MARK_BUSY:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_BUSY, 0, &abort_code);
break;
case RXRPC_SKB_MARK_REMOTE_ABORT:
abort_code = call->abort_code;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ABORT, 4, &abort_code);
break;
case RXRPC_SKB_MARK_NET_ERROR:
_debug("RECV NET ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NET_ERROR, 4, &abort_code);
break;
case RXRPC_SKB_MARK_LOCAL_ERROR:
_debug("RECV LOCAL ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_LOCAL_ERROR, 4,
&abort_code);
break;
default:
BUG();
break;
}
if (ret < 0)
goto copy_error;
terminal_message:
_debug("terminal");
msg->msg_flags &= ~MSG_MORE;
msg->msg_flags |= MSG_EOR;
if (!(flags & MSG_PEEK)) {
_net("free terminal skb %p", skb);
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
rxrpc_remove_user_ID(rx, call);
}
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
copy_error:
_debug("copy error");
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
csum_copy_error:
_debug("csum error");
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
rxrpc_kill_skb(skb);
skb_kill_datagram(&rx->sk, skb, flags);
rxrpc_put_call(call);
return -EAGAIN;
wait_interrupted:
ret = sock_intr_errno(timeo);
wait_error:
finish_wait(sk_sleep(&rx->sk), &wait);
if (continue_call)
rxrpc_put_call(continue_call);
if (copied)
copied = ret;
_leave(" = %d [waitfail %d]", copied, ret);
return copied;
} | 1608 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | rxrpc_recvmsg | rxrpc_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['iocb', 'sock', 'msg', 'len', 'flags'] | int rxrpc_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct rxrpc_skb_priv *sp;
struct rxrpc_call *call = NULL, *continue_call = NULL;
struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
struct sk_buff *skb;
long timeo;
int copy, ret, ullen, offset, copied = 0;
u32 abort_code;
DEFINE_WAIT(wait);
_enter(",,,%zu,%d", len, flags);
if (flags & (MSG_OOB | MSG_TRUNC))
return -EOPNOTSUPP;
ullen = msg->msg_flags & MSG_CMSG_COMPAT ? 4 : sizeof(unsigned long);
timeo = sock_rcvtimeo(&rx->sk, flags & MSG_DONTWAIT);
msg->msg_flags |= MSG_MORE;
lock_sock(&rx->sk);
for (;;) {
/* return immediately if a client socket has no outstanding
* calls */
if (RB_EMPTY_ROOT(&rx->calls)) {
if (copied)
goto out;
if (rx->sk.sk_state != RXRPC_SERVER_LISTENING) {
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
return -ENODATA;
}
}
/* get the next message on the Rx queue */
skb = skb_peek(&rx->sk.sk_receive_queue);
if (!skb) {
/* nothing remains on the queue */
if (copied &&
(msg->msg_flags & MSG_PEEK || timeo == 0))
goto out;
/* wait for a message to turn up */
release_sock(&rx->sk);
prepare_to_wait_exclusive(sk_sleep(&rx->sk), &wait,
TASK_INTERRUPTIBLE);
ret = sock_error(&rx->sk);
if (ret)
goto wait_error;
if (skb_queue_empty(&rx->sk.sk_receive_queue)) {
if (signal_pending(current))
goto wait_interrupted;
timeo = schedule_timeout(timeo);
}
finish_wait(sk_sleep(&rx->sk), &wait);
lock_sock(&rx->sk);
continue;
}
peek_next_packet:
sp = rxrpc_skb(skb);
call = sp->call;
ASSERT(call != NULL);
_debug("next pkt %s", rxrpc_pkts[sp->hdr.type]);
/* make sure we wait for the state to be updated in this call */
spin_lock_bh(&call->lock);
spin_unlock_bh(&call->lock);
if (test_bit(RXRPC_CALL_RELEASED, &call->flags)) {
_debug("packet from released call");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
continue;
}
/* determine whether to continue last data receive */
if (continue_call) {
_debug("maybe cont");
if (call != continue_call ||
skb->mark != RXRPC_SKB_MARK_DATA) {
release_sock(&rx->sk);
rxrpc_put_call(continue_call);
_leave(" = %d [noncont]", copied);
return copied;
}
}
rxrpc_get_call(call);
/* copy the peer address and timestamp */
if (!continue_call) {
if (msg->msg_name && msg->msg_namelen > 0)
memcpy(msg->msg_name,
&call->conn->trans->peer->srx,
sizeof(call->conn->trans->peer->srx));
sock_recv_ts_and_drops(msg, &rx->sk, skb);
}
/* receive the message */
if (skb->mark != RXRPC_SKB_MARK_DATA)
goto receive_non_data_message;
_debug("recvmsg DATA #%u { %d, %d }",
ntohl(sp->hdr.seq), skb->len, sp->offset);
if (!continue_call) {
/* only set the control data once per recvmsg() */
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
}
ASSERTCMP(ntohl(sp->hdr.seq), >=, call->rx_data_recv);
ASSERTCMP(ntohl(sp->hdr.seq), <=, call->rx_data_recv + 1);
call->rx_data_recv = ntohl(sp->hdr.seq);
ASSERTCMP(ntohl(sp->hdr.seq), >, call->rx_data_eaten);
offset = sp->offset;
copy = skb->len - offset;
if (copy > len - copied)
copy = len - copied;
if (skb->ip_summed == CHECKSUM_UNNECESSARY) {
ret = skb_copy_datagram_iovec(skb, offset,
msg->msg_iov, copy);
} else {
ret = skb_copy_and_csum_datagram_iovec(skb, offset,
msg->msg_iov);
if (ret == -EINVAL)
goto csum_copy_error;
}
if (ret < 0)
goto copy_error;
/* handle piecemeal consumption of data packets */
_debug("copied %d+%d", copy, copied);
offset += copy;
copied += copy;
if (!(flags & MSG_PEEK))
sp->offset = offset;
if (sp->offset < skb->len) {
_debug("buffer full");
ASSERTCMP(copied, ==, len);
break;
}
/* we transferred the whole data packet */
if (sp->hdr.flags & RXRPC_LAST_PACKET) {
_debug("last");
if (call->conn->out_clientflag) {
/* last byte of reply received */
ret = copied;
goto terminal_message;
}
/* last bit of request received */
if (!(flags & MSG_PEEK)) {
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) !=
skb)
BUG();
rxrpc_free_skb(skb);
}
msg->msg_flags &= ~MSG_MORE;
break;
}
/* move on to the next data message */
_debug("next");
if (!continue_call)
continue_call = sp->call;
else
rxrpc_put_call(call);
call = NULL;
if (flags & MSG_PEEK) {
_debug("peek next");
skb = skb->next;
if (skb == (struct sk_buff *) &rx->sk.sk_receive_queue)
break;
goto peek_next_packet;
}
_debug("eat packet");
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
/* end of non-terminal data packet reception for the moment */
_debug("end rcv data");
out:
release_sock(&rx->sk);
if (call)
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d [data]", copied);
return copied;
/* handle non-DATA messages such as aborts, incoming connections and
* final ACKs */
receive_non_data_message:
_debug("non-data");
if (skb->mark == RXRPC_SKB_MARK_NEW_CALL) {
_debug("RECV NEW CALL");
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NEW_CALL, 0, &abort_code);
if (ret < 0)
goto copy_error;
if (!(flags & MSG_PEEK)) {
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
}
goto out;
}
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_USER_CALL_ID,
ullen, &call->user_call_ID);
if (ret < 0)
goto copy_error;
ASSERT(test_bit(RXRPC_CALL_HAS_USERID, &call->flags));
switch (skb->mark) {
case RXRPC_SKB_MARK_DATA:
BUG();
case RXRPC_SKB_MARK_FINAL_ACK:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ACK, 0, &abort_code);
break;
case RXRPC_SKB_MARK_BUSY:
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_BUSY, 0, &abort_code);
break;
case RXRPC_SKB_MARK_REMOTE_ABORT:
abort_code = call->abort_code;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_ABORT, 4, &abort_code);
break;
case RXRPC_SKB_MARK_NET_ERROR:
_debug("RECV NET ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_NET_ERROR, 4, &abort_code);
break;
case RXRPC_SKB_MARK_LOCAL_ERROR:
_debug("RECV LOCAL ERROR %d", sp->error);
abort_code = sp->error;
ret = put_cmsg(msg, SOL_RXRPC, RXRPC_LOCAL_ERROR, 4,
&abort_code);
break;
default:
BUG();
break;
}
if (ret < 0)
goto copy_error;
terminal_message:
_debug("terminal");
msg->msg_flags &= ~MSG_MORE;
msg->msg_flags |= MSG_EOR;
if (!(flags & MSG_PEEK)) {
_net("free terminal skb %p", skb);
if (skb_dequeue(&rx->sk.sk_receive_queue) != skb)
BUG();
rxrpc_free_skb(skb);
rxrpc_remove_user_ID(rx, call);
}
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
copy_error:
_debug("copy error");
release_sock(&rx->sk);
rxrpc_put_call(call);
if (continue_call)
rxrpc_put_call(continue_call);
_leave(" = %d", ret);
return ret;
csum_copy_error:
_debug("csum error");
release_sock(&rx->sk);
if (continue_call)
rxrpc_put_call(continue_call);
rxrpc_kill_skb(skb);
skb_kill_datagram(&rx->sk, skb, flags);
rxrpc_put_call(call);
return -EAGAIN;
wait_interrupted:
ret = sock_intr_errno(timeo);
wait_error:
finish_wait(sk_sleep(&rx->sk), &wait);
if (continue_call)
rxrpc_put_call(continue_call);
if (copied)
copied = ret;
_leave(" = %d [waitfail %d]", copied, ret);
return copied;
} | 1608 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | SYSCALL_DEFINE6 | SYSCALL_DEFINE6( recvfrom , int , fd , void __user * , ubuf , size_t , size , unsigned int , flags , struct sockaddr __user * , addr , int __user * , addr_len) | ['recvfrom', 'int', 'fd', 'ubuf', 'size_t', 'size', 'int', 'flags', 'addr', 'addr_len'] | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
unsigned int, flags, struct sockaddr __user *, addr,
int __user *, addr_len)
{
struct socket *sock;
struct iovec iov;
struct msghdr msg;
struct sockaddr_storage address;
int err, err2;
int fput_needed;
if (size > INT_MAX)
size = INT_MAX;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
goto out;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_iovlen = 1;
msg.msg_iov = &iov;
iov.iov_len = size;
iov.iov_base = ubuf;
msg.msg_name = (struct sockaddr *)&address;
msg.msg_namelen = sizeof(address);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = sock_recvmsg(sock, &msg, size, flags);
if (err >= 0 && addr != NULL) {
err2 = move_addr_to_user(&address,
msg.msg_namelen, addr, addr_len);
if (err2 < 0)
err = err2;
}
fput_light(sock->file, fput_needed);
out:
return err;
} | 232 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | SYSCALL_DEFINE6 | SYSCALL_DEFINE6( recvfrom , int , fd , void __user * , ubuf , size_t , size , unsigned int , flags , struct sockaddr __user * , addr , int __user * , addr_len) | ['recvfrom', 'int', 'fd', 'ubuf', 'size_t', 'size', 'int', 'flags', 'addr', 'addr_len'] | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
unsigned int, flags, struct sockaddr __user *, addr,
int __user *, addr_len)
{
struct socket *sock;
struct iovec iov;
struct msghdr msg;
struct sockaddr_storage address;
int err, err2;
int fput_needed;
if (size > INT_MAX)
size = INT_MAX;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
goto out;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_iovlen = 1;
msg.msg_iov = &iov;
iov.iov_len = size;
iov.iov_base = ubuf;
msg.msg_name = (struct sockaddr *)&address;
msg.msg_namelen = sizeof(address);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = sock_recvmsg(sock, &msg, size, flags);
if (err >= 0 && addr != NULL) {
err2 = move_addr_to_user(&address,
msg.msg_namelen, addr, addr_len);
if (err2 < 0)
err = err2;
}
fput_light(sock->file, fput_needed);
out:
return err;
} | 232 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.0.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.65:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | SYSCALL_DEFINE6 | SYSCALL_DEFINE6( recvfrom , int , fd , void __user * , ubuf , size_t , size , unsigned int , flags , struct sockaddr __user * , addr , int __user * , addr_len) | ['recvfrom', 'int', 'fd', 'ubuf', 'size_t', 'size', 'int', 'flags', 'addr', 'addr_len'] | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
unsigned int, flags, struct sockaddr __user *, addr,
int __user *, addr_len)
{
struct socket *sock;
struct iovec iov;
struct msghdr msg;
struct sockaddr_storage address;
int err, err2;
int fput_needed;
if (size > INT_MAX)
size = INT_MAX;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
goto out;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_iovlen = 1;
msg.msg_iov = &iov;
iov.iov_len = size;
iov.iov_base = ubuf;
msg.msg_name = (struct sockaddr *)&address;
msg.msg_namelen = sizeof(address);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = sock_recvmsg(sock, &msg, size, flags);
if (err >= 0 && addr != NULL) {
err2 = move_addr_to_user(&address,
msg.msg_namelen, addr, addr_len);
if (err2 < 0)
err = err2;
}
fput_light(sock->file, fput_needed);
out:
return err;
} | 232 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | SYSCALL_DEFINE6 | SYSCALL_DEFINE6( recvfrom , int , fd , void __user * , ubuf , size_t , size , unsigned int , flags , struct sockaddr __user * , addr , int __user * , addr_len) | ['recvfrom', 'int', 'fd', 'ubuf', 'size_t', 'size', 'int', 'flags', 'addr', 'addr_len'] | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
unsigned int, flags, struct sockaddr __user *, addr,
int __user *, addr_len)
{
struct socket *sock;
struct iovec iov;
struct msghdr msg;
struct sockaddr_storage address;
int err, err2;
int fput_needed;
if (size > INT_MAX)
size = INT_MAX;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
goto out;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_iovlen = 1;
msg.msg_iov = &iov;
iov.iov_len = size;
iov.iov_base = ubuf;
msg.msg_name = (struct sockaddr *)&address;
msg.msg_namelen = sizeof(address);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = sock_recvmsg(sock, &msg, size, flags);
if (err >= 0 && addr != NULL) {
err2 = move_addr_to_user(&address,
msg.msg_namelen, addr, addr_len);
if (err2 < 0)
err = err2;
}
fput_light(sock->file, fput_needed);
out:
return err;
} | 232 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | SYSCALL_DEFINE6 | SYSCALL_DEFINE6( recvfrom , int , fd , void __user * , ubuf , size_t , size , unsigned int , flags , struct sockaddr __user * , addr , int __user * , addr_len) | ['recvfrom', 'int', 'fd', 'ubuf', 'size_t', 'size', 'int', 'flags', 'addr', 'addr_len'] | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
unsigned int, flags, struct sockaddr __user *, addr,
int __user *, addr_len)
{
struct socket *sock;
struct iovec iov;
struct msghdr msg;
struct sockaddr_storage address;
int err, err2;
int fput_needed;
if (size > INT_MAX)
size = INT_MAX;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
goto out;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_iovlen = 1;
msg.msg_iov = &iov;
iov.iov_len = size;
iov.iov_base = ubuf;
msg.msg_name = (struct sockaddr *)&address;
msg.msg_namelen = sizeof(address);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = sock_recvmsg(sock, &msg, size, flags);
if (err >= 0 && addr != NULL) {
err2 = move_addr_to_user(&address,
msg.msg_namelen, addr, addr_len);
if (err2 < 0)
err = err2;
}
fput_light(sock->file, fput_needed);
out:
return err;
} | 232 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | SYSCALL_DEFINE6 | SYSCALL_DEFINE6( recvfrom , int , fd , void __user * , ubuf , size_t , size , unsigned int , flags , struct sockaddr __user * , addr , int __user * , addr_len) | ['recvfrom', 'int', 'fd', 'ubuf', 'size_t', 'size', 'int', 'flags', 'addr', 'addr_len'] | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size,
unsigned int, flags, struct sockaddr __user *, addr,
int __user *, addr_len)
{
struct socket *sock;
struct iovec iov;
struct msghdr msg;
struct sockaddr_storage address;
int err, err2;
int fput_needed;
if (size > INT_MAX)
size = INT_MAX;
sock = sockfd_lookup_light(fd, &err, &fput_needed);
if (!sock)
goto out;
msg.msg_control = NULL;
msg.msg_controllen = 0;
msg.msg_iovlen = 1;
msg.msg_iov = &iov;
iov.iov_len = size;
iov.iov_base = ubuf;
msg.msg_name = (struct sockaddr *)&address;
msg.msg_namelen = sizeof(address);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = sock_recvmsg(sock, &msg, size, flags);
if (err >= 0 && addr != NULL) {
err2 = move_addr_to_user(&address,
msg.msg_namelen, addr, addr_len);
if (err2 < 0)
err = err2;
}
fput_light(sock->file, fput_needed);
out:
return err;
} | 232 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 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'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.39:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.53:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.54:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.60:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.61:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.44:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.45:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | ___sys_recvmsg | ___sys_recvmsg( struct socket * sock , struct msghdr __user * msg , struct msghdr * msg_sys , unsigned int flags , int nosec) | ['sock', 'msg', 'msg_sys', 'flags', 'nosec'] | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
struct msghdr *msg_sys, unsigned int flags, int nosec)
{
struct compat_msghdr __user *msg_compat =
(struct compat_msghdr __user *)msg;
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
unsigned long cmsg_ptr;
int err, total_len, len;
/* kernel mode address */
struct sockaddr_storage addr;
/* user mode address pointers */
struct sockaddr __user *uaddr;
int __user *uaddr_len;
if (MSG_CMSG_COMPAT & flags) {
if (get_compat_msghdr(msg_sys, msg_compat))
return -EFAULT;
} else {
err = copy_msghdr_from_user(msg_sys, msg);
if (err)
return err;
}
if (msg_sys->msg_iovlen > UIO_FASTIOV) {
err = -EMSGSIZE;
if (msg_sys->msg_iovlen > UIO_MAXIOV)
goto out;
err = -ENOMEM;
iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec),
GFP_KERNEL);
if (!iov)
goto out;
}
/*
* Save the user-mode address (verify_iovec will change the
* kernel msghdr to use the kernel address space)
*/
uaddr = (__force void __user *)msg_sys->msg_name;
uaddr_len = COMPAT_NAMELEN(msg);
if (MSG_CMSG_COMPAT & flags) {
err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
} else
err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
if (err < 0)
goto out_freeiov;
total_len = err;
cmsg_ptr = (unsigned long)msg_sys->msg_control;
msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
total_len, flags);
if (err < 0)
goto out_freeiov;
len = err;
if (uaddr != NULL) {
err = move_addr_to_user(&addr,
msg_sys->msg_namelen, uaddr,
uaddr_len);
if (err < 0)
goto out_freeiov;
}
err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
COMPAT_FLAGS(msg));
if (err)
goto out_freeiov;
if (MSG_CMSG_COMPAT & flags)
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg_compat->msg_controllen);
else
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg->msg_controllen);
if (err)
goto out_freeiov;
err = len;
out_freeiov:
if (iov != iovstack)
kfree(iov);
out:
return err;
} | 448 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.34:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.48:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.35:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.36:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.58:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.40:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.33:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.42:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.49:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.57:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.64:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.37:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.62:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*', 'versionEndIncluding': '3.12.3', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | ___sys_recvmsg | ___sys_recvmsg( struct socket * sock , struct msghdr __user * msg , struct msghdr * msg_sys , unsigned int flags , int nosec) | ['sock', 'msg', 'msg_sys', 'flags', 'nosec'] | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
struct msghdr *msg_sys, unsigned int flags, int nosec)
{
struct compat_msghdr __user *msg_compat =
(struct compat_msghdr __user *)msg;
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
unsigned long cmsg_ptr;
int err, total_len, len;
/* kernel mode address */
struct sockaddr_storage addr;
/* user mode address pointers */
struct sockaddr __user *uaddr;
int __user *uaddr_len;
if (MSG_CMSG_COMPAT & flags) {
if (get_compat_msghdr(msg_sys, msg_compat))
return -EFAULT;
} else {
err = copy_msghdr_from_user(msg_sys, msg);
if (err)
return err;
}
if (msg_sys->msg_iovlen > UIO_FASTIOV) {
err = -EMSGSIZE;
if (msg_sys->msg_iovlen > UIO_MAXIOV)
goto out;
err = -ENOMEM;
iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec),
GFP_KERNEL);
if (!iov)
goto out;
}
/*
* Save the user-mode address (verify_iovec will change the
* kernel msghdr to use the kernel address space)
*/
uaddr = (__force void __user *)msg_sys->msg_name;
uaddr_len = COMPAT_NAMELEN(msg);
if (MSG_CMSG_COMPAT & flags) {
err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
} else
err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
if (err < 0)
goto out_freeiov;
total_len = err;
cmsg_ptr = (unsigned long)msg_sys->msg_control;
msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
total_len, flags);
if (err < 0)
goto out_freeiov;
len = err;
if (uaddr != NULL) {
err = move_addr_to_user(&addr,
msg_sys->msg_namelen, uaddr,
uaddr_len);
if (err < 0)
goto out_freeiov;
}
err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
COMPAT_FLAGS(msg));
if (err)
goto out_freeiov;
if (MSG_CMSG_COMPAT & flags)
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg_compat->msg_controllen);
else
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg->msg_controllen);
if (err)
goto out_freeiov;
err = len;
out_freeiov:
if (iov != iovstack)
kfree(iov);
out:
return err;
} | 448 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | ___sys_recvmsg | ___sys_recvmsg( struct socket * sock , struct msghdr __user * msg , struct msghdr * msg_sys , unsigned int flags , int nosec) | ['sock', 'msg', 'msg_sys', 'flags', 'nosec'] | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
struct msghdr *msg_sys, unsigned int flags, int nosec)
{
struct compat_msghdr __user *msg_compat =
(struct compat_msghdr __user *)msg;
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
unsigned long cmsg_ptr;
int err, total_len, len;
/* kernel mode address */
struct sockaddr_storage addr;
/* user mode address pointers */
struct sockaddr __user *uaddr;
int __user *uaddr_len;
if (MSG_CMSG_COMPAT & flags) {
if (get_compat_msghdr(msg_sys, msg_compat))
return -EFAULT;
} else {
err = copy_msghdr_from_user(msg_sys, msg);
if (err)
return err;
}
if (msg_sys->msg_iovlen > UIO_FASTIOV) {
err = -EMSGSIZE;
if (msg_sys->msg_iovlen > UIO_MAXIOV)
goto out;
err = -ENOMEM;
iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec),
GFP_KERNEL);
if (!iov)
goto out;
}
/*
* Save the user-mode address (verify_iovec will change the
* kernel msghdr to use the kernel address space)
*/
uaddr = (__force void __user *)msg_sys->msg_name;
uaddr_len = COMPAT_NAMELEN(msg);
if (MSG_CMSG_COMPAT & flags) {
err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
} else
err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
if (err < 0)
goto out_freeiov;
total_len = err;
cmsg_ptr = (unsigned long)msg_sys->msg_control;
msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
total_len, flags);
if (err < 0)
goto out_freeiov;
len = err;
if (uaddr != NULL) {
err = move_addr_to_user(&addr,
msg_sys->msg_namelen, uaddr,
uaddr_len);
if (err < 0)
goto out_freeiov;
}
err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
COMPAT_FLAGS(msg));
if (err)
goto out_freeiov;
if (MSG_CMSG_COMPAT & flags)
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg_compat->msg_controllen);
else
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg->msg_controllen);
if (err)
goto out_freeiov;
err = len;
out_freeiov:
if (iov != iovstack)
kfree(iov);
out:
return err;
} | 448 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.37:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.33:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.40:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.62:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.6:*:*:*:*:*:*:*', 'cpe_name': []}, 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True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | ___sys_recvmsg | ___sys_recvmsg( struct socket * sock , struct msghdr __user * msg , struct msghdr * msg_sys , unsigned int flags , int nosec) | ['sock', 'msg', 'msg_sys', 'flags', 'nosec'] | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
struct msghdr *msg_sys, unsigned int flags, int nosec)
{
struct compat_msghdr __user *msg_compat =
(struct compat_msghdr __user *)msg;
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
unsigned long cmsg_ptr;
int err, total_len, len;
/* kernel mode address */
struct sockaddr_storage addr;
/* user mode address pointers */
struct sockaddr __user *uaddr;
int __user *uaddr_len;
if (MSG_CMSG_COMPAT & flags) {
if (get_compat_msghdr(msg_sys, msg_compat))
return -EFAULT;
} else {
err = copy_msghdr_from_user(msg_sys, msg);
if (err)
return err;
}
if (msg_sys->msg_iovlen > UIO_FASTIOV) {
err = -EMSGSIZE;
if (msg_sys->msg_iovlen > UIO_MAXIOV)
goto out;
err = -ENOMEM;
iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec),
GFP_KERNEL);
if (!iov)
goto out;
}
/*
* Save the user-mode address (verify_iovec will change the
* kernel msghdr to use the kernel address space)
*/
uaddr = (__force void __user *)msg_sys->msg_name;
uaddr_len = COMPAT_NAMELEN(msg);
if (MSG_CMSG_COMPAT & flags) {
err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
} else
err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
if (err < 0)
goto out_freeiov;
total_len = err;
cmsg_ptr = (unsigned long)msg_sys->msg_control;
msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
total_len, flags);
if (err < 0)
goto out_freeiov;
len = err;
if (uaddr != NULL) {
err = move_addr_to_user(&addr,
msg_sys->msg_namelen, uaddr,
uaddr_len);
if (err < 0)
goto out_freeiov;
}
err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
COMPAT_FLAGS(msg));
if (err)
goto out_freeiov;
if (MSG_CMSG_COMPAT & flags)
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg_compat->msg_controllen);
else
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg->msg_controllen);
if (err)
goto out_freeiov;
err = len;
out_freeiov:
if (iov != iovstack)
kfree(iov);
out:
return err;
} | 448 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | ___sys_recvmsg | ___sys_recvmsg( struct socket * sock , struct msghdr __user * msg , struct msghdr * msg_sys , unsigned int flags , int nosec) | ['sock', 'msg', 'msg_sys', 'flags', 'nosec'] | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
struct msghdr *msg_sys, unsigned int flags, int nosec)
{
struct compat_msghdr __user *msg_compat =
(struct compat_msghdr __user *)msg;
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
unsigned long cmsg_ptr;
int err, total_len, len;
/* kernel mode address */
struct sockaddr_storage addr;
/* user mode address pointers */
struct sockaddr __user *uaddr;
int __user *uaddr_len;
if (MSG_CMSG_COMPAT & flags) {
if (get_compat_msghdr(msg_sys, msg_compat))
return -EFAULT;
} else {
err = copy_msghdr_from_user(msg_sys, msg);
if (err)
return err;
}
if (msg_sys->msg_iovlen > UIO_FASTIOV) {
err = -EMSGSIZE;
if (msg_sys->msg_iovlen > UIO_MAXIOV)
goto out;
err = -ENOMEM;
iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec),
GFP_KERNEL);
if (!iov)
goto out;
}
/*
* Save the user-mode address (verify_iovec will change the
* kernel msghdr to use the kernel address space)
*/
uaddr = (__force void __user *)msg_sys->msg_name;
uaddr_len = COMPAT_NAMELEN(msg);
if (MSG_CMSG_COMPAT & flags) {
err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
} else
err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
if (err < 0)
goto out_freeiov;
total_len = err;
cmsg_ptr = (unsigned long)msg_sys->msg_control;
msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
total_len, flags);
if (err < 0)
goto out_freeiov;
len = err;
if (uaddr != NULL) {
err = move_addr_to_user(&addr,
msg_sys->msg_namelen, uaddr,
uaddr_len);
if (err < 0)
goto out_freeiov;
}
err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
COMPAT_FLAGS(msg));
if (err)
goto out_freeiov;
if (MSG_CMSG_COMPAT & flags)
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg_compat->msg_controllen);
else
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg->msg_controllen);
if (err)
goto out_freeiov;
err = len;
out_freeiov:
if (iov != iovstack)
kfree(iov);
out:
return err;
} | 448 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | ___sys_recvmsg | ___sys_recvmsg( struct socket * sock , struct msghdr __user * msg , struct msghdr * msg_sys , unsigned int flags , int nosec) | ['sock', 'msg', 'msg_sys', 'flags', 'nosec'] | static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg,
struct msghdr *msg_sys, unsigned int flags, int nosec)
{
struct compat_msghdr __user *msg_compat =
(struct compat_msghdr __user *)msg;
struct iovec iovstack[UIO_FASTIOV];
struct iovec *iov = iovstack;
unsigned long cmsg_ptr;
int err, total_len, len;
/* kernel mode address */
struct sockaddr_storage addr;
/* user mode address pointers */
struct sockaddr __user *uaddr;
int __user *uaddr_len;
if (MSG_CMSG_COMPAT & flags) {
if (get_compat_msghdr(msg_sys, msg_compat))
return -EFAULT;
} else {
err = copy_msghdr_from_user(msg_sys, msg);
if (err)
return err;
}
if (msg_sys->msg_iovlen > UIO_FASTIOV) {
err = -EMSGSIZE;
if (msg_sys->msg_iovlen > UIO_MAXIOV)
goto out;
err = -ENOMEM;
iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec),
GFP_KERNEL);
if (!iov)
goto out;
}
/*
* Save the user-mode address (verify_iovec will change the
* kernel msghdr to use the kernel address space)
*/
uaddr = (__force void __user *)msg_sys->msg_name;
uaddr_len = COMPAT_NAMELEN(msg);
if (MSG_CMSG_COMPAT & flags) {
err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
} else
err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE);
if (err < 0)
goto out_freeiov;
total_len = err;
cmsg_ptr = (unsigned long)msg_sys->msg_control;
msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT);
if (sock->file->f_flags & O_NONBLOCK)
flags |= MSG_DONTWAIT;
err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys,
total_len, flags);
if (err < 0)
goto out_freeiov;
len = err;
if (uaddr != NULL) {
err = move_addr_to_user(&addr,
msg_sys->msg_namelen, uaddr,
uaddr_len);
if (err < 0)
goto out_freeiov;
}
err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT),
COMPAT_FLAGS(msg));
if (err)
goto out_freeiov;
if (MSG_CMSG_COMPAT & flags)
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg_compat->msg_controllen);
else
err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr,
&msg->msg_controllen);
if (err)
goto out_freeiov;
err = len;
out_freeiov:
if (iov != iovstack)
kfree(iov);
out:
return err;
} | 448 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.44:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.45:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_msg | recv_msg( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_msg(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
u32 err;
int res;
/* Catch invalid receive requests */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely(sock->state == SS_UNCONNECTED)) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Capture sender's address (optional) */
set_orig_addr(m, msg);
/* Capture ancillary data (optional) */
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
if (unlikely(buf_len < sz)) {
sz = buf_len;
m->msg_flags |= MSG_TRUNC;
}
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg),
m->msg_iov, sz);
if (res)
goto exit;
res = sz;
} else {
if ((sock->state == SS_READY) ||
((err == TIPC_CONN_SHUTDOWN) || m->msg_control))
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if ((sock->state != SS_READY) &&
(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
exit:
release_sock(sk);
return res;
} | 431 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_msg | recv_msg( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_msg(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
u32 err;
int res;
/* Catch invalid receive requests */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely(sock->state == SS_UNCONNECTED)) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Capture sender's address (optional) */
set_orig_addr(m, msg);
/* Capture ancillary data (optional) */
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
if (unlikely(buf_len < sz)) {
sz = buf_len;
m->msg_flags |= MSG_TRUNC;
}
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg),
m->msg_iov, sz);
if (res)
goto exit;
res = sz;
} else {
if ((sock->state == SS_READY) ||
((err == TIPC_CONN_SHUTDOWN) || m->msg_control))
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if ((sock->state != SS_READY) &&
(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
exit:
release_sock(sk);
return res;
} | 431 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, 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'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_msg | recv_msg( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_msg(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
u32 err;
int res;
/* Catch invalid receive requests */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely(sock->state == SS_UNCONNECTED)) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Capture sender's address (optional) */
set_orig_addr(m, msg);
/* Capture ancillary data (optional) */
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
if (unlikely(buf_len < sz)) {
sz = buf_len;
m->msg_flags |= MSG_TRUNC;
}
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg),
m->msg_iov, sz);
if (res)
goto exit;
res = sz;
} else {
if ((sock->state == SS_READY) ||
((err == TIPC_CONN_SHUTDOWN) || m->msg_control))
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if ((sock->state != SS_READY) &&
(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
exit:
release_sock(sk);
return res;
} | 431 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.36:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.48:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.34:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.35:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.58:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.37:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.33:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.40:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.62:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.42:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.49:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.57:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.64:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': 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'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_msg | recv_msg( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_msg(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
u32 err;
int res;
/* Catch invalid receive requests */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely(sock->state == SS_UNCONNECTED)) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Capture sender's address (optional) */
set_orig_addr(m, msg);
/* Capture ancillary data (optional) */
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
if (unlikely(buf_len < sz)) {
sz = buf_len;
m->msg_flags |= MSG_TRUNC;
}
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg),
m->msg_iov, sz);
if (res)
goto exit;
res = sz;
} else {
if ((sock->state == SS_READY) ||
((err == TIPC_CONN_SHUTDOWN) || m->msg_control))
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if ((sock->state != SS_READY) &&
(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
exit:
release_sock(sk);
return res;
} | 431 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_msg | recv_msg( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_msg(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
u32 err;
int res;
/* Catch invalid receive requests */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely(sock->state == SS_UNCONNECTED)) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Capture sender's address (optional) */
set_orig_addr(m, msg);
/* Capture ancillary data (optional) */
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
if (unlikely(buf_len < sz)) {
sz = buf_len;
m->msg_flags |= MSG_TRUNC;
}
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg),
m->msg_iov, sz);
if (res)
goto exit;
res = sz;
} else {
if ((sock->state == SS_READY) ||
((err == TIPC_CONN_SHUTDOWN) || m->msg_control))
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if ((sock->state != SS_READY) &&
(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
exit:
release_sock(sk);
return res;
} | 431 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.55:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.56:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_msg | recv_msg( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_msg(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
u32 err;
int res;
/* Catch invalid receive requests */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely(sock->state == SS_UNCONNECTED)) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Capture sender's address (optional) */
set_orig_addr(m, msg);
/* Capture ancillary data (optional) */
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
if (unlikely(buf_len < sz)) {
sz = buf_len;
m->msg_flags |= MSG_TRUNC;
}
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg),
m->msg_iov, sz);
if (res)
goto exit;
res = sz;
} else {
if ((sock->state == SS_READY) ||
((err == TIPC_CONN_SHUTDOWN) || m->msg_control))
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if ((sock->state != SS_READY) &&
(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
exit:
release_sock(sk);
return res;
} | 431 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_stream | recv_stream( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_stream(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
int sz_to_copy, target, needed;
int sz_copied = 0;
u32 err;
int res = 0;
/* Catch invalid receive attempts */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely((sock->state == SS_UNCONNECTED))) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len);
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Optionally capture sender's address & ancillary data of first msg */
if (sz_copied == 0) {
set_orig_addr(m, msg);
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
}
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle);
sz -= offset;
needed = (buf_len - sz_copied);
sz_to_copy = (sz <= needed) ? sz : needed;
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset,
m->msg_iov, sz_to_copy);
if (res)
goto exit;
sz_copied += sz_to_copy;
if (sz_to_copy < sz) {
if (!(flags & MSG_PEEK))
TIPC_SKB_CB(buf)->handle =
(void *)(unsigned long)(offset + sz_to_copy);
goto exit;
}
} else {
if (sz_copied != 0)
goto exit; /* can't add error msg to valid data */
if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if (unlikely(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
/* Loop around if more data is required */
if ((sz_copied < buf_len) && /* didn't get all requested data */
(!skb_queue_empty(&sk->sk_receive_queue) ||
(sz_copied < target)) && /* and more is ready or required */
(!(flags & MSG_PEEK)) && /* and aren't just peeking at data */
(!err)) /* and haven't reached a FIN */
goto restart;
exit:
release_sock(sk);
return sz_copied ? sz_copied : res;
} | 571 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_stream | recv_stream( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_stream(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
int sz_to_copy, target, needed;
int sz_copied = 0;
u32 err;
int res = 0;
/* Catch invalid receive attempts */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely((sock->state == SS_UNCONNECTED))) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len);
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Optionally capture sender's address & ancillary data of first msg */
if (sz_copied == 0) {
set_orig_addr(m, msg);
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
}
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle);
sz -= offset;
needed = (buf_len - sz_copied);
sz_to_copy = (sz <= needed) ? sz : needed;
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset,
m->msg_iov, sz_to_copy);
if (res)
goto exit;
sz_copied += sz_to_copy;
if (sz_to_copy < sz) {
if (!(flags & MSG_PEEK))
TIPC_SKB_CB(buf)->handle =
(void *)(unsigned long)(offset + sz_to_copy);
goto exit;
}
} else {
if (sz_copied != 0)
goto exit; /* can't add error msg to valid data */
if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if (unlikely(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
/* Loop around if more data is required */
if ((sz_copied < buf_len) && /* didn't get all requested data */
(!skb_queue_empty(&sk->sk_receive_queue) ||
(sz_copied < target)) && /* and more is ready or required */
(!(flags & MSG_PEEK)) && /* and aren't just peeking at data */
(!err)) /* and haven't reached a FIN */
goto restart;
exit:
release_sock(sk);
return sz_copied ? sz_copied : res;
} | 571 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.65:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_stream | recv_stream( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_stream(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
int sz_to_copy, target, needed;
int sz_copied = 0;
u32 err;
int res = 0;
/* Catch invalid receive attempts */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely((sock->state == SS_UNCONNECTED))) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len);
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Optionally capture sender's address & ancillary data of first msg */
if (sz_copied == 0) {
set_orig_addr(m, msg);
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
}
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle);
sz -= offset;
needed = (buf_len - sz_copied);
sz_to_copy = (sz <= needed) ? sz : needed;
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset,
m->msg_iov, sz_to_copy);
if (res)
goto exit;
sz_copied += sz_to_copy;
if (sz_to_copy < sz) {
if (!(flags & MSG_PEEK))
TIPC_SKB_CB(buf)->handle =
(void *)(unsigned long)(offset + sz_to_copy);
goto exit;
}
} else {
if (sz_copied != 0)
goto exit; /* can't add error msg to valid data */
if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if (unlikely(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
/* Loop around if more data is required */
if ((sz_copied < buf_len) && /* didn't get all requested data */
(!skb_queue_empty(&sk->sk_receive_queue) ||
(sz_copied < target)) && /* and more is ready or required */
(!(flags & MSG_PEEK)) && /* and aren't just peeking at data */
(!err)) /* and haven't reached a FIN */
goto restart;
exit:
release_sock(sk);
return sz_copied ? sz_copied : res;
} | 571 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_stream | recv_stream( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_stream(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
int sz_to_copy, target, needed;
int sz_copied = 0;
u32 err;
int res = 0;
/* Catch invalid receive attempts */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely((sock->state == SS_UNCONNECTED))) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len);
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Optionally capture sender's address & ancillary data of first msg */
if (sz_copied == 0) {
set_orig_addr(m, msg);
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
}
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle);
sz -= offset;
needed = (buf_len - sz_copied);
sz_to_copy = (sz <= needed) ? sz : needed;
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset,
m->msg_iov, sz_to_copy);
if (res)
goto exit;
sz_copied += sz_to_copy;
if (sz_to_copy < sz) {
if (!(flags & MSG_PEEK))
TIPC_SKB_CB(buf)->handle =
(void *)(unsigned long)(offset + sz_to_copy);
goto exit;
}
} else {
if (sz_copied != 0)
goto exit; /* can't add error msg to valid data */
if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if (unlikely(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
/* Loop around if more data is required */
if ((sz_copied < buf_len) && /* didn't get all requested data */
(!skb_queue_empty(&sk->sk_receive_queue) ||
(sz_copied < target)) && /* and more is ready or required */
(!(flags & MSG_PEEK)) && /* and aren't just peeking at data */
(!err)) /* and haven't reached a FIN */
goto restart;
exit:
release_sock(sk);
return sz_copied ? sz_copied : res;
} | 571 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 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net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_stream | recv_stream( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_stream(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
int sz_to_copy, target, needed;
int sz_copied = 0;
u32 err;
int res = 0;
/* Catch invalid receive attempts */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely((sock->state == SS_UNCONNECTED))) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len);
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Optionally capture sender's address & ancillary data of first msg */
if (sz_copied == 0) {
set_orig_addr(m, msg);
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
}
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle);
sz -= offset;
needed = (buf_len - sz_copied);
sz_to_copy = (sz <= needed) ? sz : needed;
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset,
m->msg_iov, sz_to_copy);
if (res)
goto exit;
sz_copied += sz_to_copy;
if (sz_to_copy < sz) {
if (!(flags & MSG_PEEK))
TIPC_SKB_CB(buf)->handle =
(void *)(unsigned long)(offset + sz_to_copy);
goto exit;
}
} else {
if (sz_copied != 0)
goto exit; /* can't add error msg to valid data */
if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if (unlikely(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
/* Loop around if more data is required */
if ((sz_copied < buf_len) && /* didn't get all requested data */
(!skb_queue_empty(&sk->sk_receive_queue) ||
(sz_copied < target)) && /* and more is ready or required */
(!(flags & MSG_PEEK)) && /* and aren't just peeking at data */
(!err)) /* and haven't reached a FIN */
goto restart;
exit:
release_sock(sk);
return sz_copied ? sz_copied : res;
} | 571 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.55:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.56:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | recv_stream | recv_stream( struct kiocb * iocb , struct socket * sock , struct msghdr * m , size_t buf_len , int flags) | ['iocb', 'sock', 'm', 'buf_len', 'flags'] | static int recv_stream(struct kiocb *iocb, struct socket *sock,
struct msghdr *m, size_t buf_len, int flags)
{
struct sock *sk = sock->sk;
struct tipc_port *tport = tipc_sk_port(sk);
struct sk_buff *buf;
struct tipc_msg *msg;
long timeout;
unsigned int sz;
int sz_to_copy, target, needed;
int sz_copied = 0;
u32 err;
int res = 0;
/* Catch invalid receive attempts */
if (unlikely(!buf_len))
return -EINVAL;
lock_sock(sk);
if (unlikely((sock->state == SS_UNCONNECTED))) {
res = -ENOTCONN;
goto exit;
}
/* will be updated in set_orig_addr() if needed */
m->msg_namelen = 0;
target = sock_rcvlowat(sk, flags & MSG_WAITALL, buf_len);
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
restart:
/* Look for a message in receive queue; wait if necessary */
while (skb_queue_empty(&sk->sk_receive_queue)) {
if (sock->state == SS_DISCONNECTING) {
res = -ENOTCONN;
goto exit;
}
if (timeout <= 0L) {
res = timeout ? timeout : -EWOULDBLOCK;
goto exit;
}
release_sock(sk);
timeout = wait_event_interruptible_timeout(*sk_sleep(sk),
tipc_rx_ready(sock),
timeout);
lock_sock(sk);
}
/* Look at first message in receive queue */
buf = skb_peek(&sk->sk_receive_queue);
msg = buf_msg(buf);
sz = msg_data_sz(msg);
err = msg_errcode(msg);
/* Discard an empty non-errored message & try again */
if ((!sz) && (!err)) {
advance_rx_queue(sk);
goto restart;
}
/* Optionally capture sender's address & ancillary data of first msg */
if (sz_copied == 0) {
set_orig_addr(m, msg);
res = anc_data_recv(m, msg, tport);
if (res)
goto exit;
}
/* Capture message data (if valid) & compute return value (always) */
if (!err) {
u32 offset = (u32)(unsigned long)(TIPC_SKB_CB(buf)->handle);
sz -= offset;
needed = (buf_len - sz_copied);
sz_to_copy = (sz <= needed) ? sz : needed;
res = skb_copy_datagram_iovec(buf, msg_hdr_sz(msg) + offset,
m->msg_iov, sz_to_copy);
if (res)
goto exit;
sz_copied += sz_to_copy;
if (sz_to_copy < sz) {
if (!(flags & MSG_PEEK))
TIPC_SKB_CB(buf)->handle =
(void *)(unsigned long)(offset + sz_to_copy);
goto exit;
}
} else {
if (sz_copied != 0)
goto exit; /* can't add error msg to valid data */
if ((err == TIPC_CONN_SHUTDOWN) || m->msg_control)
res = 0;
else
res = -ECONNRESET;
}
/* Consume received message (optional) */
if (likely(!(flags & MSG_PEEK))) {
if (unlikely(++tport->conn_unacked >= TIPC_FLOW_CONTROL_WIN))
tipc_acknowledge(tport->ref, tport->conn_unacked);
advance_rx_queue(sk);
}
/* Loop around if more data is required */
if ((sz_copied < buf_len) && /* didn't get all requested data */
(!skb_queue_empty(&sk->sk_receive_queue) ||
(sz_copied < target)) && /* and more is ready or required */
(!(flags & MSG_PEEK)) && /* and aren't just peeking at data */
(!err)) /* and haven't reached a FIN */
goto restart;
exit:
release_sock(sk);
return sz_copied ? sz_copied : res;
} | 571 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_copy_addr | unix_copy_addr( struct msghdr * msg , struct sock * sk) | ['msg', 'sk'] | static void unix_copy_addr(struct msghdr *msg, struct sock *sk)
{
struct unix_sock *u = unix_sk(sk);
msg->msg_namelen = 0;
if (u->addr) {
msg->msg_namelen = u->addr->len;
memcpy(msg->msg_name, u->addr->name, u->addr->len);
}
} | 67 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak 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'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_copy_addr | unix_copy_addr( struct msghdr * msg , struct sock * sk) | ['msg', 'sk'] | static void unix_copy_addr(struct msghdr *msg, struct sock *sk)
{
struct unix_sock *u = unix_sk(sk);
msg->msg_namelen = 0;
if (u->addr) {
msg->msg_namelen = u->addr->len;
memcpy(msg->msg_name, u->addr->name, u->addr->len);
}
} | 67 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_copy_addr | unix_copy_addr( struct msghdr * msg , struct sock * sk) | ['msg', 'sk'] | static void unix_copy_addr(struct msghdr *msg, struct sock *sk)
{
struct unix_sock *u = unix_sk(sk);
msg->msg_namelen = 0;
if (u->addr) {
msg->msg_namelen = u->addr->len;
memcpy(msg->msg_name, u->addr->name, u->addr->len);
}
} | 67 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 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'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_copy_addr | unix_copy_addr( struct msghdr * msg , struct sock * sk) | ['msg', 'sk'] | static void unix_copy_addr(struct msghdr *msg, struct sock *sk)
{
struct unix_sock *u = unix_sk(sk);
msg->msg_namelen = 0;
if (u->addr) {
msg->msg_namelen = u->addr->len;
memcpy(msg->msg_name, u->addr->name, u->addr->len);
}
} | 67 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': 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'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.34:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.48:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.35:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.36:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.58:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_copy_addr | unix_copy_addr( struct msghdr * msg , struct sock * sk) | ['msg', 'sk'] | static void unix_copy_addr(struct msghdr *msg, struct sock *sk)
{
struct unix_sock *u = unix_sk(sk);
msg->msg_namelen = 0;
if (u->addr) {
msg->msg_namelen = u->addr->len;
memcpy(msg->msg_name, u->addr->name, u->addr->len);
}
} | 67 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 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'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_copy_addr | unix_copy_addr( struct msghdr * msg , struct sock * sk) | ['msg', 'sk'] | static void unix_copy_addr(struct msghdr *msg, struct sock *sk)
{
struct unix_sock *u = unix_sk(sk);
msg->msg_namelen = 0;
if (u->addr) {
msg->msg_namelen = u->addr->len;
memcpy(msg->msg_name, u->addr->name, u->addr->len);
}
} | 67 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_dgram_recvmsg | unix_dgram_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
int noblock = flags & MSG_DONTWAIT;
struct sk_buff *skb;
int err;
int peeked, skip;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
msg->msg_namelen = 0;
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(sock_rcvtimeo(sk, noblock));
goto out;
}
skip = sk_peek_offset(sk, flags);
skb = __skb_recv_datagram(sk, flags, &peeked, &skip, &err);
if (!skb) {
unix_state_lock(sk);
/* Signal EOF on disconnected non-blocking SEQPACKET socket. */
if (sk->sk_type == SOCK_SEQPACKET && err == -EAGAIN &&
(sk->sk_shutdown & RCV_SHUTDOWN))
err = 0;
unix_state_unlock(sk);
goto out_unlock;
}
wake_up_interruptible_sync_poll(&u->peer_wait,
POLLOUT | POLLWRNORM | POLLWRBAND);
if (msg->msg_name)
unix_copy_addr(msg, skb->sk);
if (size > skb->len - skip)
size = skb->len - skip;
else if (size < skb->len - skip)
msg->msg_flags |= MSG_TRUNC;
err = skb_copy_datagram_iovec(skb, skip, msg->msg_iov, size);
if (err)
goto out_free;
if (sock_flag(sk, SOCK_RCVTSTAMP))
__sock_recv_timestamp(msg, sk, skb);
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
unix_set_secdata(siocb->scm, skb);
if (!(flags & MSG_PEEK)) {
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
sk_peek_offset_bwd(sk, skb->len);
} else {
/* It is questionable: on PEEK we could:
- do not return fds - good, but too simple 8)
- return fds, and do not return them on read (old strategy,
apparently wrong)
- clone fds (I chose it for now, it is the most universal
solution)
POSIX 1003.1g does not actually define this clearly
at all. POSIX 1003.1g doesn't define a lot of things
clearly however!
*/
sk_peek_offset_fwd(sk, size);
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
}
err = (flags & MSG_TRUNC) ? skb->len - skip : size;
scm_recv(sock, msg, siocb->scm, flags);
out_free:
skb_free_datagram(sk, skb);
out_unlock:
mutex_unlock(&u->readlock);
out:
return err;
} | 497 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_dgram_recvmsg | unix_dgram_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
int noblock = flags & MSG_DONTWAIT;
struct sk_buff *skb;
int err;
int peeked, skip;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
msg->msg_namelen = 0;
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(sock_rcvtimeo(sk, noblock));
goto out;
}
skip = sk_peek_offset(sk, flags);
skb = __skb_recv_datagram(sk, flags, &peeked, &skip, &err);
if (!skb) {
unix_state_lock(sk);
/* Signal EOF on disconnected non-blocking SEQPACKET socket. */
if (sk->sk_type == SOCK_SEQPACKET && err == -EAGAIN &&
(sk->sk_shutdown & RCV_SHUTDOWN))
err = 0;
unix_state_unlock(sk);
goto out_unlock;
}
wake_up_interruptible_sync_poll(&u->peer_wait,
POLLOUT | POLLWRNORM | POLLWRBAND);
if (msg->msg_name)
unix_copy_addr(msg, skb->sk);
if (size > skb->len - skip)
size = skb->len - skip;
else if (size < skb->len - skip)
msg->msg_flags |= MSG_TRUNC;
err = skb_copy_datagram_iovec(skb, skip, msg->msg_iov, size);
if (err)
goto out_free;
if (sock_flag(sk, SOCK_RCVTSTAMP))
__sock_recv_timestamp(msg, sk, skb);
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
unix_set_secdata(siocb->scm, skb);
if (!(flags & MSG_PEEK)) {
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
sk_peek_offset_bwd(sk, skb->len);
} else {
/* It is questionable: on PEEK we could:
- do not return fds - good, but too simple 8)
- return fds, and do not return them on read (old strategy,
apparently wrong)
- clone fds (I chose it for now, it is the most universal
solution)
POSIX 1003.1g does not actually define this clearly
at all. POSIX 1003.1g doesn't define a lot of things
clearly however!
*/
sk_peek_offset_fwd(sk, size);
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
}
err = (flags & MSG_TRUNC) ? skb->len - skip : size;
scm_recv(sock, msg, siocb->scm, flags);
out_free:
skb_free_datagram(sk, skb);
out_unlock:
mutex_unlock(&u->readlock);
out:
return err;
} | 497 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.4:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.65:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_dgram_recvmsg | unix_dgram_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
int noblock = flags & MSG_DONTWAIT;
struct sk_buff *skb;
int err;
int peeked, skip;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
msg->msg_namelen = 0;
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(sock_rcvtimeo(sk, noblock));
goto out;
}
skip = sk_peek_offset(sk, flags);
skb = __skb_recv_datagram(sk, flags, &peeked, &skip, &err);
if (!skb) {
unix_state_lock(sk);
/* Signal EOF on disconnected non-blocking SEQPACKET socket. */
if (sk->sk_type == SOCK_SEQPACKET && err == -EAGAIN &&
(sk->sk_shutdown & RCV_SHUTDOWN))
err = 0;
unix_state_unlock(sk);
goto out_unlock;
}
wake_up_interruptible_sync_poll(&u->peer_wait,
POLLOUT | POLLWRNORM | POLLWRBAND);
if (msg->msg_name)
unix_copy_addr(msg, skb->sk);
if (size > skb->len - skip)
size = skb->len - skip;
else if (size < skb->len - skip)
msg->msg_flags |= MSG_TRUNC;
err = skb_copy_datagram_iovec(skb, skip, msg->msg_iov, size);
if (err)
goto out_free;
if (sock_flag(sk, SOCK_RCVTSTAMP))
__sock_recv_timestamp(msg, sk, skb);
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
unix_set_secdata(siocb->scm, skb);
if (!(flags & MSG_PEEK)) {
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
sk_peek_offset_bwd(sk, skb->len);
} else {
/* It is questionable: on PEEK we could:
- do not return fds - good, but too simple 8)
- return fds, and do not return them on read (old strategy,
apparently wrong)
- clone fds (I chose it for now, it is the most universal
solution)
POSIX 1003.1g does not actually define this clearly
at all. POSIX 1003.1g doesn't define a lot of things
clearly however!
*/
sk_peek_offset_fwd(sk, size);
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
}
err = (flags & MSG_TRUNC) ? skb->len - skip : size;
scm_recv(sock, msg, siocb->scm, flags);
out_free:
skb_free_datagram(sk, skb);
out_unlock:
mutex_unlock(&u->readlock);
out:
return err;
} | 497 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | 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'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_dgram_recvmsg | unix_dgram_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
int noblock = flags & MSG_DONTWAIT;
struct sk_buff *skb;
int err;
int peeked, skip;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
msg->msg_namelen = 0;
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(sock_rcvtimeo(sk, noblock));
goto out;
}
skip = sk_peek_offset(sk, flags);
skb = __skb_recv_datagram(sk, flags, &peeked, &skip, &err);
if (!skb) {
unix_state_lock(sk);
/* Signal EOF on disconnected non-blocking SEQPACKET socket. */
if (sk->sk_type == SOCK_SEQPACKET && err == -EAGAIN &&
(sk->sk_shutdown & RCV_SHUTDOWN))
err = 0;
unix_state_unlock(sk);
goto out_unlock;
}
wake_up_interruptible_sync_poll(&u->peer_wait,
POLLOUT | POLLWRNORM | POLLWRBAND);
if (msg->msg_name)
unix_copy_addr(msg, skb->sk);
if (size > skb->len - skip)
size = skb->len - skip;
else if (size < skb->len - skip)
msg->msg_flags |= MSG_TRUNC;
err = skb_copy_datagram_iovec(skb, skip, msg->msg_iov, size);
if (err)
goto out_free;
if (sock_flag(sk, SOCK_RCVTSTAMP))
__sock_recv_timestamp(msg, sk, skb);
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
unix_set_secdata(siocb->scm, skb);
if (!(flags & MSG_PEEK)) {
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
sk_peek_offset_bwd(sk, skb->len);
} else {
/* It is questionable: on PEEK we could:
- do not return fds - good, but too simple 8)
- return fds, and do not return them on read (old strategy,
apparently wrong)
- clone fds (I chose it for now, it is the most universal
solution)
POSIX 1003.1g does not actually define this clearly
at all. POSIX 1003.1g doesn't define a lot of things
clearly however!
*/
sk_peek_offset_fwd(sk, size);
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
}
err = (flags & MSG_TRUNC) ? skb->len - skip : size;
scm_recv(sock, msg, siocb->scm, flags);
out_free:
skb_free_datagram(sk, skb);
out_unlock:
mutex_unlock(&u->readlock);
out:
return err;
} | 497 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_dgram_recvmsg | unix_dgram_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
int noblock = flags & MSG_DONTWAIT;
struct sk_buff *skb;
int err;
int peeked, skip;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
msg->msg_namelen = 0;
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(sock_rcvtimeo(sk, noblock));
goto out;
}
skip = sk_peek_offset(sk, flags);
skb = __skb_recv_datagram(sk, flags, &peeked, &skip, &err);
if (!skb) {
unix_state_lock(sk);
/* Signal EOF on disconnected non-blocking SEQPACKET socket. */
if (sk->sk_type == SOCK_SEQPACKET && err == -EAGAIN &&
(sk->sk_shutdown & RCV_SHUTDOWN))
err = 0;
unix_state_unlock(sk);
goto out_unlock;
}
wake_up_interruptible_sync_poll(&u->peer_wait,
POLLOUT | POLLWRNORM | POLLWRBAND);
if (msg->msg_name)
unix_copy_addr(msg, skb->sk);
if (size > skb->len - skip)
size = skb->len - skip;
else if (size < skb->len - skip)
msg->msg_flags |= MSG_TRUNC;
err = skb_copy_datagram_iovec(skb, skip, msg->msg_iov, size);
if (err)
goto out_free;
if (sock_flag(sk, SOCK_RCVTSTAMP))
__sock_recv_timestamp(msg, sk, skb);
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
unix_set_secdata(siocb->scm, skb);
if (!(flags & MSG_PEEK)) {
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
sk_peek_offset_bwd(sk, skb->len);
} else {
/* It is questionable: on PEEK we could:
- do not return fds - good, but too simple 8)
- return fds, and do not return them on read (old strategy,
apparently wrong)
- clone fds (I chose it for now, it is the most universal
solution)
POSIX 1003.1g does not actually define this clearly
at all. POSIX 1003.1g doesn't define a lot of things
clearly however!
*/
sk_peek_offset_fwd(sk, size);
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
}
err = (flags & MSG_TRUNC) ? skb->len - skip : size;
scm_recv(sock, msg, siocb->scm, flags);
out_free:
skb_free_datagram(sk, skb);
out_unlock:
mutex_unlock(&u->readlock);
out:
return err;
} | 497 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 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'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.55:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.56:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_dgram_recvmsg | unix_dgram_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
int noblock = flags & MSG_DONTWAIT;
struct sk_buff *skb;
int err;
int peeked, skip;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
msg->msg_namelen = 0;
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(sock_rcvtimeo(sk, noblock));
goto out;
}
skip = sk_peek_offset(sk, flags);
skb = __skb_recv_datagram(sk, flags, &peeked, &skip, &err);
if (!skb) {
unix_state_lock(sk);
/* Signal EOF on disconnected non-blocking SEQPACKET socket. */
if (sk->sk_type == SOCK_SEQPACKET && err == -EAGAIN &&
(sk->sk_shutdown & RCV_SHUTDOWN))
err = 0;
unix_state_unlock(sk);
goto out_unlock;
}
wake_up_interruptible_sync_poll(&u->peer_wait,
POLLOUT | POLLWRNORM | POLLWRBAND);
if (msg->msg_name)
unix_copy_addr(msg, skb->sk);
if (size > skb->len - skip)
size = skb->len - skip;
else if (size < skb->len - skip)
msg->msg_flags |= MSG_TRUNC;
err = skb_copy_datagram_iovec(skb, skip, msg->msg_iov, size);
if (err)
goto out_free;
if (sock_flag(sk, SOCK_RCVTSTAMP))
__sock_recv_timestamp(msg, sk, skb);
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
unix_set_secdata(siocb->scm, skb);
if (!(flags & MSG_PEEK)) {
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
sk_peek_offset_bwd(sk, skb->len);
} else {
/* It is questionable: on PEEK we could:
- do not return fds - good, but too simple 8)
- return fds, and do not return them on read (old strategy,
apparently wrong)
- clone fds (I chose it for now, it is the most universal
solution)
POSIX 1003.1g does not actually define this clearly
at all. POSIX 1003.1g doesn't define a lot of things
clearly however!
*/
sk_peek_offset_fwd(sk, size);
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
}
err = (flags & MSG_TRUNC) ? skb->len - skip : size;
scm_recv(sock, msg, siocb->scm, flags);
out_free:
skb_free_datagram(sk, skb);
out_unlock:
mutex_unlock(&u->readlock);
out:
return err;
} | 497 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 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'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_stream_recvmsg | unix_stream_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
struct sockaddr_un *sunaddr = msg->msg_name;
int copied = 0;
int check_creds = 0;
int target;
int err = 0;
long timeo;
int skip;
err = -EINVAL;
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
target = sock_rcvlowat(sk, flags&MSG_WAITALL, size);
timeo = sock_rcvtimeo(sk, flags&MSG_DONTWAIT);
msg->msg_namelen = 0;
/* Lock the socket to prevent queue disordering
* while sleeps in memcpy_tomsg
*/
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(timeo);
goto out;
}
do {
int chunk;
struct sk_buff *skb, *last;
unix_state_lock(sk);
last = skb = skb_peek(&sk->sk_receive_queue);
again:
if (skb == NULL) {
unix_sk(sk)->recursion_level = 0;
if (copied >= target)
goto unlock;
/*
* POSIX 1003.1g mandates this order.
*/
err = sock_error(sk);
if (err)
goto unlock;
if (sk->sk_shutdown & RCV_SHUTDOWN)
goto unlock;
unix_state_unlock(sk);
err = -EAGAIN;
if (!timeo)
break;
mutex_unlock(&u->readlock);
timeo = unix_stream_data_wait(sk, timeo, last);
if (signal_pending(current)
|| mutex_lock_interruptible(&u->readlock)) {
err = sock_intr_errno(timeo);
goto out;
}
continue;
unlock:
unix_state_unlock(sk);
break;
}
skip = sk_peek_offset(sk, flags);
while (skip >= unix_skb_len(skb)) {
skip -= unix_skb_len(skb);
last = skb;
skb = skb_peek_next(skb, &sk->sk_receive_queue);
if (!skb)
goto again;
}
unix_state_unlock(sk);
if (check_creds) {
/* Never glue messages from different writers */
if ((UNIXCB(skb).pid != siocb->scm->pid) ||
!uid_eq(UNIXCB(skb).uid, siocb->scm->creds.uid) ||
!gid_eq(UNIXCB(skb).gid, siocb->scm->creds.gid))
break;
} else if (test_bit(SOCK_PASSCRED, &sock->flags)) {
/* Copy credentials */
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
check_creds = 1;
}
/* Copy address just once */
if (sunaddr) {
unix_copy_addr(msg, skb->sk);
sunaddr = NULL;
}
chunk = min_t(unsigned int, unix_skb_len(skb) - skip, size);
if (skb_copy_datagram_iovec(skb, UNIXCB(skb).consumed + skip,
msg->msg_iov, chunk)) {
if (copied == 0)
copied = -EFAULT;
break;
}
copied += chunk;
size -= chunk;
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
UNIXCB(skb).consumed += chunk;
sk_peek_offset_bwd(sk, chunk);
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
if (unix_skb_len(skb))
break;
skb_unlink(skb, &sk->sk_receive_queue);
consume_skb(skb);
if (siocb->scm->fp)
break;
} else {
/* It is questionable, see note in unix_dgram_recvmsg.
*/
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
sk_peek_offset_fwd(sk, chunk);
break;
}
} while (size);
mutex_unlock(&u->readlock);
scm_recv(sock, msg, siocb->scm, flags);
out:
return copied ? : err;
} | 761 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_stream_recvmsg | unix_stream_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
struct sockaddr_un *sunaddr = msg->msg_name;
int copied = 0;
int check_creds = 0;
int target;
int err = 0;
long timeo;
int skip;
err = -EINVAL;
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
target = sock_rcvlowat(sk, flags&MSG_WAITALL, size);
timeo = sock_rcvtimeo(sk, flags&MSG_DONTWAIT);
msg->msg_namelen = 0;
/* Lock the socket to prevent queue disordering
* while sleeps in memcpy_tomsg
*/
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(timeo);
goto out;
}
do {
int chunk;
struct sk_buff *skb, *last;
unix_state_lock(sk);
last = skb = skb_peek(&sk->sk_receive_queue);
again:
if (skb == NULL) {
unix_sk(sk)->recursion_level = 0;
if (copied >= target)
goto unlock;
/*
* POSIX 1003.1g mandates this order.
*/
err = sock_error(sk);
if (err)
goto unlock;
if (sk->sk_shutdown & RCV_SHUTDOWN)
goto unlock;
unix_state_unlock(sk);
err = -EAGAIN;
if (!timeo)
break;
mutex_unlock(&u->readlock);
timeo = unix_stream_data_wait(sk, timeo, last);
if (signal_pending(current)
|| mutex_lock_interruptible(&u->readlock)) {
err = sock_intr_errno(timeo);
goto out;
}
continue;
unlock:
unix_state_unlock(sk);
break;
}
skip = sk_peek_offset(sk, flags);
while (skip >= unix_skb_len(skb)) {
skip -= unix_skb_len(skb);
last = skb;
skb = skb_peek_next(skb, &sk->sk_receive_queue);
if (!skb)
goto again;
}
unix_state_unlock(sk);
if (check_creds) {
/* Never glue messages from different writers */
if ((UNIXCB(skb).pid != siocb->scm->pid) ||
!uid_eq(UNIXCB(skb).uid, siocb->scm->creds.uid) ||
!gid_eq(UNIXCB(skb).gid, siocb->scm->creds.gid))
break;
} else if (test_bit(SOCK_PASSCRED, &sock->flags)) {
/* Copy credentials */
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
check_creds = 1;
}
/* Copy address just once */
if (sunaddr) {
unix_copy_addr(msg, skb->sk);
sunaddr = NULL;
}
chunk = min_t(unsigned int, unix_skb_len(skb) - skip, size);
if (skb_copy_datagram_iovec(skb, UNIXCB(skb).consumed + skip,
msg->msg_iov, chunk)) {
if (copied == 0)
copied = -EFAULT;
break;
}
copied += chunk;
size -= chunk;
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
UNIXCB(skb).consumed += chunk;
sk_peek_offset_bwd(sk, chunk);
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
if (unix_skb_len(skb))
break;
skb_unlink(skb, &sk->sk_receive_queue);
consume_skb(skb);
if (siocb->scm->fp)
break;
} else {
/* It is questionable, see note in unix_dgram_recvmsg.
*/
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
sk_peek_offset_fwd(sk, chunk);
break;
}
} while (size);
mutex_unlock(&u->readlock);
scm_recv(sock, msg, siocb->scm, flags);
out:
return copied ? : err;
} | 761 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.65:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_stream_recvmsg | unix_stream_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
struct sockaddr_un *sunaddr = msg->msg_name;
int copied = 0;
int check_creds = 0;
int target;
int err = 0;
long timeo;
int skip;
err = -EINVAL;
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
target = sock_rcvlowat(sk, flags&MSG_WAITALL, size);
timeo = sock_rcvtimeo(sk, flags&MSG_DONTWAIT);
msg->msg_namelen = 0;
/* Lock the socket to prevent queue disordering
* while sleeps in memcpy_tomsg
*/
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(timeo);
goto out;
}
do {
int chunk;
struct sk_buff *skb, *last;
unix_state_lock(sk);
last = skb = skb_peek(&sk->sk_receive_queue);
again:
if (skb == NULL) {
unix_sk(sk)->recursion_level = 0;
if (copied >= target)
goto unlock;
/*
* POSIX 1003.1g mandates this order.
*/
err = sock_error(sk);
if (err)
goto unlock;
if (sk->sk_shutdown & RCV_SHUTDOWN)
goto unlock;
unix_state_unlock(sk);
err = -EAGAIN;
if (!timeo)
break;
mutex_unlock(&u->readlock);
timeo = unix_stream_data_wait(sk, timeo, last);
if (signal_pending(current)
|| mutex_lock_interruptible(&u->readlock)) {
err = sock_intr_errno(timeo);
goto out;
}
continue;
unlock:
unix_state_unlock(sk);
break;
}
skip = sk_peek_offset(sk, flags);
while (skip >= unix_skb_len(skb)) {
skip -= unix_skb_len(skb);
last = skb;
skb = skb_peek_next(skb, &sk->sk_receive_queue);
if (!skb)
goto again;
}
unix_state_unlock(sk);
if (check_creds) {
/* Never glue messages from different writers */
if ((UNIXCB(skb).pid != siocb->scm->pid) ||
!uid_eq(UNIXCB(skb).uid, siocb->scm->creds.uid) ||
!gid_eq(UNIXCB(skb).gid, siocb->scm->creds.gid))
break;
} else if (test_bit(SOCK_PASSCRED, &sock->flags)) {
/* Copy credentials */
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
check_creds = 1;
}
/* Copy address just once */
if (sunaddr) {
unix_copy_addr(msg, skb->sk);
sunaddr = NULL;
}
chunk = min_t(unsigned int, unix_skb_len(skb) - skip, size);
if (skb_copy_datagram_iovec(skb, UNIXCB(skb).consumed + skip,
msg->msg_iov, chunk)) {
if (copied == 0)
copied = -EFAULT;
break;
}
copied += chunk;
size -= chunk;
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
UNIXCB(skb).consumed += chunk;
sk_peek_offset_bwd(sk, chunk);
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
if (unix_skb_len(skb))
break;
skb_unlink(skb, &sk->sk_receive_queue);
consume_skb(skb);
if (siocb->scm->fp)
break;
} else {
/* It is questionable, see note in unix_dgram_recvmsg.
*/
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
sk_peek_offset_fwd(sk, chunk);
break;
}
} while (size);
mutex_unlock(&u->readlock);
scm_recv(sock, msg, siocb->scm, flags);
out:
return copied ? : err;
} | 761 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_stream_recvmsg | unix_stream_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
struct sockaddr_un *sunaddr = msg->msg_name;
int copied = 0;
int check_creds = 0;
int target;
int err = 0;
long timeo;
int skip;
err = -EINVAL;
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
target = sock_rcvlowat(sk, flags&MSG_WAITALL, size);
timeo = sock_rcvtimeo(sk, flags&MSG_DONTWAIT);
msg->msg_namelen = 0;
/* Lock the socket to prevent queue disordering
* while sleeps in memcpy_tomsg
*/
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(timeo);
goto out;
}
do {
int chunk;
struct sk_buff *skb, *last;
unix_state_lock(sk);
last = skb = skb_peek(&sk->sk_receive_queue);
again:
if (skb == NULL) {
unix_sk(sk)->recursion_level = 0;
if (copied >= target)
goto unlock;
/*
* POSIX 1003.1g mandates this order.
*/
err = sock_error(sk);
if (err)
goto unlock;
if (sk->sk_shutdown & RCV_SHUTDOWN)
goto unlock;
unix_state_unlock(sk);
err = -EAGAIN;
if (!timeo)
break;
mutex_unlock(&u->readlock);
timeo = unix_stream_data_wait(sk, timeo, last);
if (signal_pending(current)
|| mutex_lock_interruptible(&u->readlock)) {
err = sock_intr_errno(timeo);
goto out;
}
continue;
unlock:
unix_state_unlock(sk);
break;
}
skip = sk_peek_offset(sk, flags);
while (skip >= unix_skb_len(skb)) {
skip -= unix_skb_len(skb);
last = skb;
skb = skb_peek_next(skb, &sk->sk_receive_queue);
if (!skb)
goto again;
}
unix_state_unlock(sk);
if (check_creds) {
/* Never glue messages from different writers */
if ((UNIXCB(skb).pid != siocb->scm->pid) ||
!uid_eq(UNIXCB(skb).uid, siocb->scm->creds.uid) ||
!gid_eq(UNIXCB(skb).gid, siocb->scm->creds.gid))
break;
} else if (test_bit(SOCK_PASSCRED, &sock->flags)) {
/* Copy credentials */
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
check_creds = 1;
}
/* Copy address just once */
if (sunaddr) {
unix_copy_addr(msg, skb->sk);
sunaddr = NULL;
}
chunk = min_t(unsigned int, unix_skb_len(skb) - skip, size);
if (skb_copy_datagram_iovec(skb, UNIXCB(skb).consumed + skip,
msg->msg_iov, chunk)) {
if (copied == 0)
copied = -EFAULT;
break;
}
copied += chunk;
size -= chunk;
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
UNIXCB(skb).consumed += chunk;
sk_peek_offset_bwd(sk, chunk);
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
if (unix_skb_len(skb))
break;
skb_unlink(skb, &sk->sk_receive_queue);
consume_skb(skb);
if (siocb->scm->fp)
break;
} else {
/* It is questionable, see note in unix_dgram_recvmsg.
*/
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
sk_peek_offset_fwd(sk, chunk);
break;
}
} while (size);
mutex_unlock(&u->readlock);
scm_recv(sock, msg, siocb->scm, flags);
out:
return copied ? : err;
} | 761 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_stream_recvmsg | unix_stream_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
struct sockaddr_un *sunaddr = msg->msg_name;
int copied = 0;
int check_creds = 0;
int target;
int err = 0;
long timeo;
int skip;
err = -EINVAL;
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
target = sock_rcvlowat(sk, flags&MSG_WAITALL, size);
timeo = sock_rcvtimeo(sk, flags&MSG_DONTWAIT);
msg->msg_namelen = 0;
/* Lock the socket to prevent queue disordering
* while sleeps in memcpy_tomsg
*/
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(timeo);
goto out;
}
do {
int chunk;
struct sk_buff *skb, *last;
unix_state_lock(sk);
last = skb = skb_peek(&sk->sk_receive_queue);
again:
if (skb == NULL) {
unix_sk(sk)->recursion_level = 0;
if (copied >= target)
goto unlock;
/*
* POSIX 1003.1g mandates this order.
*/
err = sock_error(sk);
if (err)
goto unlock;
if (sk->sk_shutdown & RCV_SHUTDOWN)
goto unlock;
unix_state_unlock(sk);
err = -EAGAIN;
if (!timeo)
break;
mutex_unlock(&u->readlock);
timeo = unix_stream_data_wait(sk, timeo, last);
if (signal_pending(current)
|| mutex_lock_interruptible(&u->readlock)) {
err = sock_intr_errno(timeo);
goto out;
}
continue;
unlock:
unix_state_unlock(sk);
break;
}
skip = sk_peek_offset(sk, flags);
while (skip >= unix_skb_len(skb)) {
skip -= unix_skb_len(skb);
last = skb;
skb = skb_peek_next(skb, &sk->sk_receive_queue);
if (!skb)
goto again;
}
unix_state_unlock(sk);
if (check_creds) {
/* Never glue messages from different writers */
if ((UNIXCB(skb).pid != siocb->scm->pid) ||
!uid_eq(UNIXCB(skb).uid, siocb->scm->creds.uid) ||
!gid_eq(UNIXCB(skb).gid, siocb->scm->creds.gid))
break;
} else if (test_bit(SOCK_PASSCRED, &sock->flags)) {
/* Copy credentials */
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
check_creds = 1;
}
/* Copy address just once */
if (sunaddr) {
unix_copy_addr(msg, skb->sk);
sunaddr = NULL;
}
chunk = min_t(unsigned int, unix_skb_len(skb) - skip, size);
if (skb_copy_datagram_iovec(skb, UNIXCB(skb).consumed + skip,
msg->msg_iov, chunk)) {
if (copied == 0)
copied = -EFAULT;
break;
}
copied += chunk;
size -= chunk;
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
UNIXCB(skb).consumed += chunk;
sk_peek_offset_bwd(sk, chunk);
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
if (unix_skb_len(skb))
break;
skb_unlink(skb, &sk->sk_receive_queue);
consume_skb(skb);
if (siocb->scm->fp)
break;
} else {
/* It is questionable, see note in unix_dgram_recvmsg.
*/
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
sk_peek_offset_fwd(sk, chunk);
break;
}
} while (size);
mutex_unlock(&u->readlock);
scm_recv(sock, msg, siocb->scm, flags);
out:
return copied ? : err;
} | 761 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 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'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.55:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.56:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | unix_stream_recvmsg | unix_stream_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int unix_stream_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock_iocb *siocb = kiocb_to_siocb(iocb);
struct scm_cookie tmp_scm;
struct sock *sk = sock->sk;
struct unix_sock *u = unix_sk(sk);
struct sockaddr_un *sunaddr = msg->msg_name;
int copied = 0;
int check_creds = 0;
int target;
int err = 0;
long timeo;
int skip;
err = -EINVAL;
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
err = -EOPNOTSUPP;
if (flags&MSG_OOB)
goto out;
target = sock_rcvlowat(sk, flags&MSG_WAITALL, size);
timeo = sock_rcvtimeo(sk, flags&MSG_DONTWAIT);
msg->msg_namelen = 0;
/* Lock the socket to prevent queue disordering
* while sleeps in memcpy_tomsg
*/
if (!siocb->scm) {
siocb->scm = &tmp_scm;
memset(&tmp_scm, 0, sizeof(tmp_scm));
}
err = mutex_lock_interruptible(&u->readlock);
if (err) {
err = sock_intr_errno(timeo);
goto out;
}
do {
int chunk;
struct sk_buff *skb, *last;
unix_state_lock(sk);
last = skb = skb_peek(&sk->sk_receive_queue);
again:
if (skb == NULL) {
unix_sk(sk)->recursion_level = 0;
if (copied >= target)
goto unlock;
/*
* POSIX 1003.1g mandates this order.
*/
err = sock_error(sk);
if (err)
goto unlock;
if (sk->sk_shutdown & RCV_SHUTDOWN)
goto unlock;
unix_state_unlock(sk);
err = -EAGAIN;
if (!timeo)
break;
mutex_unlock(&u->readlock);
timeo = unix_stream_data_wait(sk, timeo, last);
if (signal_pending(current)
|| mutex_lock_interruptible(&u->readlock)) {
err = sock_intr_errno(timeo);
goto out;
}
continue;
unlock:
unix_state_unlock(sk);
break;
}
skip = sk_peek_offset(sk, flags);
while (skip >= unix_skb_len(skb)) {
skip -= unix_skb_len(skb);
last = skb;
skb = skb_peek_next(skb, &sk->sk_receive_queue);
if (!skb)
goto again;
}
unix_state_unlock(sk);
if (check_creds) {
/* Never glue messages from different writers */
if ((UNIXCB(skb).pid != siocb->scm->pid) ||
!uid_eq(UNIXCB(skb).uid, siocb->scm->creds.uid) ||
!gid_eq(UNIXCB(skb).gid, siocb->scm->creds.gid))
break;
} else if (test_bit(SOCK_PASSCRED, &sock->flags)) {
/* Copy credentials */
scm_set_cred(siocb->scm, UNIXCB(skb).pid, UNIXCB(skb).uid, UNIXCB(skb).gid);
check_creds = 1;
}
/* Copy address just once */
if (sunaddr) {
unix_copy_addr(msg, skb->sk);
sunaddr = NULL;
}
chunk = min_t(unsigned int, unix_skb_len(skb) - skip, size);
if (skb_copy_datagram_iovec(skb, UNIXCB(skb).consumed + skip,
msg->msg_iov, chunk)) {
if (copied == 0)
copied = -EFAULT;
break;
}
copied += chunk;
size -= chunk;
/* Mark read part of skb as used */
if (!(flags & MSG_PEEK)) {
UNIXCB(skb).consumed += chunk;
sk_peek_offset_bwd(sk, chunk);
if (UNIXCB(skb).fp)
unix_detach_fds(siocb->scm, skb);
if (unix_skb_len(skb))
break;
skb_unlink(skb, &sk->sk_receive_queue);
consume_skb(skb);
if (siocb->scm->fp)
break;
} else {
/* It is questionable, see note in unix_dgram_recvmsg.
*/
if (UNIXCB(skb).fp)
siocb->scm->fp = scm_fp_dup(UNIXCB(skb).fp);
sk_peek_offset_fwd(sk, chunk);
break;
}
} while (size);
mutex_unlock(&u->readlock);
scm_recv(sock, msg, siocb->scm, flags);
out:
return copied ? : err;
} | 761 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vsock_stream_recvmsg | vsock_stream_recvmsg( struct kiocb * kiocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'sock', 'msg', 'len', 'flags'] | vsock_stream_recvmsg(struct kiocb *kiocb,
struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk;
struct vsock_sock *vsk;
int err;
size_t target;
ssize_t copied;
long timeout;
struct vsock_transport_recv_notify_data recv_data;
DEFINE_WAIT(wait);
sk = sock->sk;
vsk = vsock_sk(sk);
err = 0;
msg->msg_namelen = 0;
lock_sock(sk);
if (sk->sk_state != SS_CONNECTED) {
/* Recvmsg is supposed to return 0 if a peer performs an
* orderly shutdown. Differentiate between that case and when a
* peer has not connected or a local shutdown occured with the
* SOCK_DONE flag.
*/
if (sock_flag(sk, SOCK_DONE))
err = 0;
else
err = -ENOTCONN;
goto out;
}
if (flags & MSG_OOB) {
err = -EOPNOTSUPP;
goto out;
}
/* We don't check peer_shutdown flag here since peer may actually shut
* down, but there can be data in the queue that a local socket can
* receive.
*/
if (sk->sk_shutdown & RCV_SHUTDOWN) {
err = 0;
goto out;
}
/* It is valid on Linux to pass in a zero-length receive buffer. This
* is not an error. We may as well bail out now.
*/
if (!len) {
err = 0;
goto out;
}
/* We must not copy less than target bytes into the user's buffer
* before returning successfully, so we wait for the consume queue to
* have that much data to consume before dequeueing. Note that this
* makes it impossible to handle cases where target is greater than the
* queue size.
*/
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
if (target >= transport->stream_rcvhiwat(vsk)) {
err = -ENOMEM;
goto out;
}
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
copied = 0;
err = transport->notify_recv_init(vsk, target, &recv_data);
if (err < 0)
goto out;
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
while (1) {
s64 ready = vsock_stream_has_data(vsk);
if (ready < 0) {
/* Invalid queue pair content. XXX This should be
* changed to a connection reset in a later change.
*/
err = -ENOMEM;
goto out_wait;
} else if (ready > 0) {
ssize_t read;
err = transport->notify_recv_pre_dequeue(
vsk, target, &recv_data);
if (err < 0)
break;
read = transport->stream_dequeue(
vsk, msg->msg_iov,
len - copied, flags);
if (read < 0) {
err = -ENOMEM;
break;
}
copied += read;
err = transport->notify_recv_post_dequeue(
vsk, target, read,
!(flags & MSG_PEEK), &recv_data);
if (err < 0)
goto out_wait;
if (read >= target || flags & MSG_PEEK)
break;
target -= read;
} else {
if (sk->sk_err != 0 || (sk->sk_shutdown & RCV_SHUTDOWN)
|| (vsk->peer_shutdown & SEND_SHUTDOWN)) {
break;
}
/* Don't wait for non-blocking sockets. */
if (timeout == 0) {
err = -EAGAIN;
break;
}
err = transport->notify_recv_pre_block(
vsk, target, &recv_data);
if (err < 0)
break;
release_sock(sk);
timeout = schedule_timeout(timeout);
lock_sock(sk);
if (signal_pending(current)) {
err = sock_intr_errno(timeout);
break;
} else if (timeout == 0) {
err = -EAGAIN;
break;
}
prepare_to_wait(sk_sleep(sk), &wait,
TASK_INTERRUPTIBLE);
}
}
if (sk->sk_err)
err = -sk->sk_err;
else if (sk->sk_shutdown & RCV_SHUTDOWN)
err = 0;
if (copied > 0) {
/* We only do these additional bookkeeping/notification steps
* if we actually copied something out of the queue pair
* instead of just peeking ahead.
*/
if (!(flags & MSG_PEEK)) {
/* If the other side has shutdown for sending and there
* is nothing more to read, then modify the socket
* state.
*/
if (vsk->peer_shutdown & SEND_SHUTDOWN) {
if (vsock_stream_has_data(vsk) <= 0) {
sk->sk_state = SS_UNCONNECTED;
sock_set_flag(sk, SOCK_DONE);
sk->sk_state_change(sk);
}
}
}
err = copied;
}
out_wait:
finish_wait(sk_sleep(sk), &wait);
out:
release_sock(sk);
return err;
} | 643 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vsock_stream_recvmsg | vsock_stream_recvmsg( struct kiocb * kiocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'sock', 'msg', 'len', 'flags'] | vsock_stream_recvmsg(struct kiocb *kiocb,
struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk;
struct vsock_sock *vsk;
int err;
size_t target;
ssize_t copied;
long timeout;
struct vsock_transport_recv_notify_data recv_data;
DEFINE_WAIT(wait);
sk = sock->sk;
vsk = vsock_sk(sk);
err = 0;
msg->msg_namelen = 0;
lock_sock(sk);
if (sk->sk_state != SS_CONNECTED) {
/* Recvmsg is supposed to return 0 if a peer performs an
* orderly shutdown. Differentiate between that case and when a
* peer has not connected or a local shutdown occured with the
* SOCK_DONE flag.
*/
if (sock_flag(sk, SOCK_DONE))
err = 0;
else
err = -ENOTCONN;
goto out;
}
if (flags & MSG_OOB) {
err = -EOPNOTSUPP;
goto out;
}
/* We don't check peer_shutdown flag here since peer may actually shut
* down, but there can be data in the queue that a local socket can
* receive.
*/
if (sk->sk_shutdown & RCV_SHUTDOWN) {
err = 0;
goto out;
}
/* It is valid on Linux to pass in a zero-length receive buffer. This
* is not an error. We may as well bail out now.
*/
if (!len) {
err = 0;
goto out;
}
/* We must not copy less than target bytes into the user's buffer
* before returning successfully, so we wait for the consume queue to
* have that much data to consume before dequeueing. Note that this
* makes it impossible to handle cases where target is greater than the
* queue size.
*/
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
if (target >= transport->stream_rcvhiwat(vsk)) {
err = -ENOMEM;
goto out;
}
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
copied = 0;
err = transport->notify_recv_init(vsk, target, &recv_data);
if (err < 0)
goto out;
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
while (1) {
s64 ready = vsock_stream_has_data(vsk);
if (ready < 0) {
/* Invalid queue pair content. XXX This should be
* changed to a connection reset in a later change.
*/
err = -ENOMEM;
goto out_wait;
} else if (ready > 0) {
ssize_t read;
err = transport->notify_recv_pre_dequeue(
vsk, target, &recv_data);
if (err < 0)
break;
read = transport->stream_dequeue(
vsk, msg->msg_iov,
len - copied, flags);
if (read < 0) {
err = -ENOMEM;
break;
}
copied += read;
err = transport->notify_recv_post_dequeue(
vsk, target, read,
!(flags & MSG_PEEK), &recv_data);
if (err < 0)
goto out_wait;
if (read >= target || flags & MSG_PEEK)
break;
target -= read;
} else {
if (sk->sk_err != 0 || (sk->sk_shutdown & RCV_SHUTDOWN)
|| (vsk->peer_shutdown & SEND_SHUTDOWN)) {
break;
}
/* Don't wait for non-blocking sockets. */
if (timeout == 0) {
err = -EAGAIN;
break;
}
err = transport->notify_recv_pre_block(
vsk, target, &recv_data);
if (err < 0)
break;
release_sock(sk);
timeout = schedule_timeout(timeout);
lock_sock(sk);
if (signal_pending(current)) {
err = sock_intr_errno(timeout);
break;
} else if (timeout == 0) {
err = -EAGAIN;
break;
}
prepare_to_wait(sk_sleep(sk), &wait,
TASK_INTERRUPTIBLE);
}
}
if (sk->sk_err)
err = -sk->sk_err;
else if (sk->sk_shutdown & RCV_SHUTDOWN)
err = 0;
if (copied > 0) {
/* We only do these additional bookkeeping/notification steps
* if we actually copied something out of the queue pair
* instead of just peeking ahead.
*/
if (!(flags & MSG_PEEK)) {
/* If the other side has shutdown for sending and there
* is nothing more to read, then modify the socket
* state.
*/
if (vsk->peer_shutdown & SEND_SHUTDOWN) {
if (vsock_stream_has_data(vsk) <= 0) {
sk->sk_state = SS_UNCONNECTED;
sock_set_flag(sk, SOCK_DONE);
sk->sk_state_change(sk);
}
}
}
err = copied;
}
out_wait:
finish_wait(sk_sleep(sk), &wait);
out:
release_sock(sk);
return err;
} | 643 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.65:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vsock_stream_recvmsg | vsock_stream_recvmsg( struct kiocb * kiocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'sock', 'msg', 'len', 'flags'] | vsock_stream_recvmsg(struct kiocb *kiocb,
struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk;
struct vsock_sock *vsk;
int err;
size_t target;
ssize_t copied;
long timeout;
struct vsock_transport_recv_notify_data recv_data;
DEFINE_WAIT(wait);
sk = sock->sk;
vsk = vsock_sk(sk);
err = 0;
msg->msg_namelen = 0;
lock_sock(sk);
if (sk->sk_state != SS_CONNECTED) {
/* Recvmsg is supposed to return 0 if a peer performs an
* orderly shutdown. Differentiate between that case and when a
* peer has not connected or a local shutdown occured with the
* SOCK_DONE flag.
*/
if (sock_flag(sk, SOCK_DONE))
err = 0;
else
err = -ENOTCONN;
goto out;
}
if (flags & MSG_OOB) {
err = -EOPNOTSUPP;
goto out;
}
/* We don't check peer_shutdown flag here since peer may actually shut
* down, but there can be data in the queue that a local socket can
* receive.
*/
if (sk->sk_shutdown & RCV_SHUTDOWN) {
err = 0;
goto out;
}
/* It is valid on Linux to pass in a zero-length receive buffer. This
* is not an error. We may as well bail out now.
*/
if (!len) {
err = 0;
goto out;
}
/* We must not copy less than target bytes into the user's buffer
* before returning successfully, so we wait for the consume queue to
* have that much data to consume before dequeueing. Note that this
* makes it impossible to handle cases where target is greater than the
* queue size.
*/
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
if (target >= transport->stream_rcvhiwat(vsk)) {
err = -ENOMEM;
goto out;
}
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
copied = 0;
err = transport->notify_recv_init(vsk, target, &recv_data);
if (err < 0)
goto out;
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
while (1) {
s64 ready = vsock_stream_has_data(vsk);
if (ready < 0) {
/* Invalid queue pair content. XXX This should be
* changed to a connection reset in a later change.
*/
err = -ENOMEM;
goto out_wait;
} else if (ready > 0) {
ssize_t read;
err = transport->notify_recv_pre_dequeue(
vsk, target, &recv_data);
if (err < 0)
break;
read = transport->stream_dequeue(
vsk, msg->msg_iov,
len - copied, flags);
if (read < 0) {
err = -ENOMEM;
break;
}
copied += read;
err = transport->notify_recv_post_dequeue(
vsk, target, read,
!(flags & MSG_PEEK), &recv_data);
if (err < 0)
goto out_wait;
if (read >= target || flags & MSG_PEEK)
break;
target -= read;
} else {
if (sk->sk_err != 0 || (sk->sk_shutdown & RCV_SHUTDOWN)
|| (vsk->peer_shutdown & SEND_SHUTDOWN)) {
break;
}
/* Don't wait for non-blocking sockets. */
if (timeout == 0) {
err = -EAGAIN;
break;
}
err = transport->notify_recv_pre_block(
vsk, target, &recv_data);
if (err < 0)
break;
release_sock(sk);
timeout = schedule_timeout(timeout);
lock_sock(sk);
if (signal_pending(current)) {
err = sock_intr_errno(timeout);
break;
} else if (timeout == 0) {
err = -EAGAIN;
break;
}
prepare_to_wait(sk_sleep(sk), &wait,
TASK_INTERRUPTIBLE);
}
}
if (sk->sk_err)
err = -sk->sk_err;
else if (sk->sk_shutdown & RCV_SHUTDOWN)
err = 0;
if (copied > 0) {
/* We only do these additional bookkeeping/notification steps
* if we actually copied something out of the queue pair
* instead of just peeking ahead.
*/
if (!(flags & MSG_PEEK)) {
/* If the other side has shutdown for sending and there
* is nothing more to read, then modify the socket
* state.
*/
if (vsk->peer_shutdown & SEND_SHUTDOWN) {
if (vsock_stream_has_data(vsk) <= 0) {
sk->sk_state = SS_UNCONNECTED;
sock_set_flag(sk, SOCK_DONE);
sk->sk_state_change(sk);
}
}
}
err = copied;
}
out_wait:
finish_wait(sk_sleep(sk), &wait);
out:
release_sock(sk);
return err;
} | 643 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vsock_stream_recvmsg | vsock_stream_recvmsg( struct kiocb * kiocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'sock', 'msg', 'len', 'flags'] | vsock_stream_recvmsg(struct kiocb *kiocb,
struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk;
struct vsock_sock *vsk;
int err;
size_t target;
ssize_t copied;
long timeout;
struct vsock_transport_recv_notify_data recv_data;
DEFINE_WAIT(wait);
sk = sock->sk;
vsk = vsock_sk(sk);
err = 0;
msg->msg_namelen = 0;
lock_sock(sk);
if (sk->sk_state != SS_CONNECTED) {
/* Recvmsg is supposed to return 0 if a peer performs an
* orderly shutdown. Differentiate between that case and when a
* peer has not connected or a local shutdown occured with the
* SOCK_DONE flag.
*/
if (sock_flag(sk, SOCK_DONE))
err = 0;
else
err = -ENOTCONN;
goto out;
}
if (flags & MSG_OOB) {
err = -EOPNOTSUPP;
goto out;
}
/* We don't check peer_shutdown flag here since peer may actually shut
* down, but there can be data in the queue that a local socket can
* receive.
*/
if (sk->sk_shutdown & RCV_SHUTDOWN) {
err = 0;
goto out;
}
/* It is valid on Linux to pass in a zero-length receive buffer. This
* is not an error. We may as well bail out now.
*/
if (!len) {
err = 0;
goto out;
}
/* We must not copy less than target bytes into the user's buffer
* before returning successfully, so we wait for the consume queue to
* have that much data to consume before dequeueing. Note that this
* makes it impossible to handle cases where target is greater than the
* queue size.
*/
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
if (target >= transport->stream_rcvhiwat(vsk)) {
err = -ENOMEM;
goto out;
}
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
copied = 0;
err = transport->notify_recv_init(vsk, target, &recv_data);
if (err < 0)
goto out;
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
while (1) {
s64 ready = vsock_stream_has_data(vsk);
if (ready < 0) {
/* Invalid queue pair content. XXX This should be
* changed to a connection reset in a later change.
*/
err = -ENOMEM;
goto out_wait;
} else if (ready > 0) {
ssize_t read;
err = transport->notify_recv_pre_dequeue(
vsk, target, &recv_data);
if (err < 0)
break;
read = transport->stream_dequeue(
vsk, msg->msg_iov,
len - copied, flags);
if (read < 0) {
err = -ENOMEM;
break;
}
copied += read;
err = transport->notify_recv_post_dequeue(
vsk, target, read,
!(flags & MSG_PEEK), &recv_data);
if (err < 0)
goto out_wait;
if (read >= target || flags & MSG_PEEK)
break;
target -= read;
} else {
if (sk->sk_err != 0 || (sk->sk_shutdown & RCV_SHUTDOWN)
|| (vsk->peer_shutdown & SEND_SHUTDOWN)) {
break;
}
/* Don't wait for non-blocking sockets. */
if (timeout == 0) {
err = -EAGAIN;
break;
}
err = transport->notify_recv_pre_block(
vsk, target, &recv_data);
if (err < 0)
break;
release_sock(sk);
timeout = schedule_timeout(timeout);
lock_sock(sk);
if (signal_pending(current)) {
err = sock_intr_errno(timeout);
break;
} else if (timeout == 0) {
err = -EAGAIN;
break;
}
prepare_to_wait(sk_sleep(sk), &wait,
TASK_INTERRUPTIBLE);
}
}
if (sk->sk_err)
err = -sk->sk_err;
else if (sk->sk_shutdown & RCV_SHUTDOWN)
err = 0;
if (copied > 0) {
/* We only do these additional bookkeeping/notification steps
* if we actually copied something out of the queue pair
* instead of just peeking ahead.
*/
if (!(flags & MSG_PEEK)) {
/* If the other side has shutdown for sending and there
* is nothing more to read, then modify the socket
* state.
*/
if (vsk->peer_shutdown & SEND_SHUTDOWN) {
if (vsock_stream_has_data(vsk) <= 0) {
sk->sk_state = SS_UNCONNECTED;
sock_set_flag(sk, SOCK_DONE);
sk->sk_state_change(sk);
}
}
}
err = copied;
}
out_wait:
finish_wait(sk_sleep(sk), &wait);
out:
release_sock(sk);
return err;
} | 643 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vsock_stream_recvmsg | vsock_stream_recvmsg( struct kiocb * kiocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'sock', 'msg', 'len', 'flags'] | vsock_stream_recvmsg(struct kiocb *kiocb,
struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk;
struct vsock_sock *vsk;
int err;
size_t target;
ssize_t copied;
long timeout;
struct vsock_transport_recv_notify_data recv_data;
DEFINE_WAIT(wait);
sk = sock->sk;
vsk = vsock_sk(sk);
err = 0;
msg->msg_namelen = 0;
lock_sock(sk);
if (sk->sk_state != SS_CONNECTED) {
/* Recvmsg is supposed to return 0 if a peer performs an
* orderly shutdown. Differentiate between that case and when a
* peer has not connected or a local shutdown occured with the
* SOCK_DONE flag.
*/
if (sock_flag(sk, SOCK_DONE))
err = 0;
else
err = -ENOTCONN;
goto out;
}
if (flags & MSG_OOB) {
err = -EOPNOTSUPP;
goto out;
}
/* We don't check peer_shutdown flag here since peer may actually shut
* down, but there can be data in the queue that a local socket can
* receive.
*/
if (sk->sk_shutdown & RCV_SHUTDOWN) {
err = 0;
goto out;
}
/* It is valid on Linux to pass in a zero-length receive buffer. This
* is not an error. We may as well bail out now.
*/
if (!len) {
err = 0;
goto out;
}
/* We must not copy less than target bytes into the user's buffer
* before returning successfully, so we wait for the consume queue to
* have that much data to consume before dequeueing. Note that this
* makes it impossible to handle cases where target is greater than the
* queue size.
*/
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
if (target >= transport->stream_rcvhiwat(vsk)) {
err = -ENOMEM;
goto out;
}
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
copied = 0;
err = transport->notify_recv_init(vsk, target, &recv_data);
if (err < 0)
goto out;
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
while (1) {
s64 ready = vsock_stream_has_data(vsk);
if (ready < 0) {
/* Invalid queue pair content. XXX This should be
* changed to a connection reset in a later change.
*/
err = -ENOMEM;
goto out_wait;
} else if (ready > 0) {
ssize_t read;
err = transport->notify_recv_pre_dequeue(
vsk, target, &recv_data);
if (err < 0)
break;
read = transport->stream_dequeue(
vsk, msg->msg_iov,
len - copied, flags);
if (read < 0) {
err = -ENOMEM;
break;
}
copied += read;
err = transport->notify_recv_post_dequeue(
vsk, target, read,
!(flags & MSG_PEEK), &recv_data);
if (err < 0)
goto out_wait;
if (read >= target || flags & MSG_PEEK)
break;
target -= read;
} else {
if (sk->sk_err != 0 || (sk->sk_shutdown & RCV_SHUTDOWN)
|| (vsk->peer_shutdown & SEND_SHUTDOWN)) {
break;
}
/* Don't wait for non-blocking sockets. */
if (timeout == 0) {
err = -EAGAIN;
break;
}
err = transport->notify_recv_pre_block(
vsk, target, &recv_data);
if (err < 0)
break;
release_sock(sk);
timeout = schedule_timeout(timeout);
lock_sock(sk);
if (signal_pending(current)) {
err = sock_intr_errno(timeout);
break;
} else if (timeout == 0) {
err = -EAGAIN;
break;
}
prepare_to_wait(sk_sleep(sk), &wait,
TASK_INTERRUPTIBLE);
}
}
if (sk->sk_err)
err = -sk->sk_err;
else if (sk->sk_shutdown & RCV_SHUTDOWN)
err = 0;
if (copied > 0) {
/* We only do these additional bookkeeping/notification steps
* if we actually copied something out of the queue pair
* instead of just peeking ahead.
*/
if (!(flags & MSG_PEEK)) {
/* If the other side has shutdown for sending and there
* is nothing more to read, then modify the socket
* state.
*/
if (vsk->peer_shutdown & SEND_SHUTDOWN) {
if (vsock_stream_has_data(vsk) <= 0) {
sk->sk_state = SS_UNCONNECTED;
sock_set_flag(sk, SOCK_DONE);
sk->sk_state_change(sk);
}
}
}
err = copied;
}
out_wait:
finish_wait(sk_sleep(sk), &wait);
out:
release_sock(sk);
return err;
} | 643 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 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'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.55:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.56:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vsock_stream_recvmsg | vsock_stream_recvmsg( struct kiocb * kiocb , struct socket * sock , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'sock', 'msg', 'len', 'flags'] | vsock_stream_recvmsg(struct kiocb *kiocb,
struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
struct sock *sk;
struct vsock_sock *vsk;
int err;
size_t target;
ssize_t copied;
long timeout;
struct vsock_transport_recv_notify_data recv_data;
DEFINE_WAIT(wait);
sk = sock->sk;
vsk = vsock_sk(sk);
err = 0;
msg->msg_namelen = 0;
lock_sock(sk);
if (sk->sk_state != SS_CONNECTED) {
/* Recvmsg is supposed to return 0 if a peer performs an
* orderly shutdown. Differentiate between that case and when a
* peer has not connected or a local shutdown occured with the
* SOCK_DONE flag.
*/
if (sock_flag(sk, SOCK_DONE))
err = 0;
else
err = -ENOTCONN;
goto out;
}
if (flags & MSG_OOB) {
err = -EOPNOTSUPP;
goto out;
}
/* We don't check peer_shutdown flag here since peer may actually shut
* down, but there can be data in the queue that a local socket can
* receive.
*/
if (sk->sk_shutdown & RCV_SHUTDOWN) {
err = 0;
goto out;
}
/* It is valid on Linux to pass in a zero-length receive buffer. This
* is not an error. We may as well bail out now.
*/
if (!len) {
err = 0;
goto out;
}
/* We must not copy less than target bytes into the user's buffer
* before returning successfully, so we wait for the consume queue to
* have that much data to consume before dequeueing. Note that this
* makes it impossible to handle cases where target is greater than the
* queue size.
*/
target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
if (target >= transport->stream_rcvhiwat(vsk)) {
err = -ENOMEM;
goto out;
}
timeout = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
copied = 0;
err = transport->notify_recv_init(vsk, target, &recv_data);
if (err < 0)
goto out;
prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
while (1) {
s64 ready = vsock_stream_has_data(vsk);
if (ready < 0) {
/* Invalid queue pair content. XXX This should be
* changed to a connection reset in a later change.
*/
err = -ENOMEM;
goto out_wait;
} else if (ready > 0) {
ssize_t read;
err = transport->notify_recv_pre_dequeue(
vsk, target, &recv_data);
if (err < 0)
break;
read = transport->stream_dequeue(
vsk, msg->msg_iov,
len - copied, flags);
if (read < 0) {
err = -ENOMEM;
break;
}
copied += read;
err = transport->notify_recv_post_dequeue(
vsk, target, read,
!(flags & MSG_PEEK), &recv_data);
if (err < 0)
goto out_wait;
if (read >= target || flags & MSG_PEEK)
break;
target -= read;
} else {
if (sk->sk_err != 0 || (sk->sk_shutdown & RCV_SHUTDOWN)
|| (vsk->peer_shutdown & SEND_SHUTDOWN)) {
break;
}
/* Don't wait for non-blocking sockets. */
if (timeout == 0) {
err = -EAGAIN;
break;
}
err = transport->notify_recv_pre_block(
vsk, target, &recv_data);
if (err < 0)
break;
release_sock(sk);
timeout = schedule_timeout(timeout);
lock_sock(sk);
if (signal_pending(current)) {
err = sock_intr_errno(timeout);
break;
} else if (timeout == 0) {
err = -EAGAIN;
break;
}
prepare_to_wait(sk_sleep(sk), &wait,
TASK_INTERRUPTIBLE);
}
}
if (sk->sk_err)
err = -sk->sk_err;
else if (sk->sk_shutdown & RCV_SHUTDOWN)
err = 0;
if (copied > 0) {
/* We only do these additional bookkeeping/notification steps
* if we actually copied something out of the queue pair
* instead of just peeking ahead.
*/
if (!(flags & MSG_PEEK)) {
/* If the other side has shutdown for sending and there
* is nothing more to read, then modify the socket
* state.
*/
if (vsk->peer_shutdown & SEND_SHUTDOWN) {
if (vsock_stream_has_data(vsk) <= 0) {
sk->sk_state = SS_UNCONNECTED;
sock_set_flag(sk, SOCK_DONE);
sk->sk_state_change(sk);
}
}
}
err = copied;
}
out_wait:
finish_wait(sk_sleep(sk), &wait);
out:
release_sock(sk);
return err;
} | 643 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 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'cpe:2.3:o:linux:linux_kernel:3.0.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.44:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.45:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vmci_transport_dgram_dequeue | vmci_transport_dgram_dequeue( struct kiocb * kiocb , struct vsock_sock * vsk , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'vsk', 'msg', 'len', 'flags'] | static int vmci_transport_dgram_dequeue(struct kiocb *kiocb,
struct vsock_sock *vsk,
struct msghdr *msg, size_t len,
int flags)
{
int err;
int noblock;
struct vmci_datagram *dg;
size_t payload_len;
struct sk_buff *skb;
noblock = flags & MSG_DONTWAIT;
if (flags & MSG_OOB || flags & MSG_ERRQUEUE)
return -EOPNOTSUPP;
msg->msg_namelen = 0;
/* Retrieve the head sk_buff from the socket's receive queue. */
err = 0;
skb = skb_recv_datagram(&vsk->sk, flags, noblock, &err);
if (err)
return err;
if (!skb)
return -EAGAIN;
dg = (struct vmci_datagram *)skb->data;
if (!dg)
/* err is 0, meaning we read zero bytes. */
goto out;
payload_len = dg->payload_size;
/* Ensure the sk_buff matches the payload size claimed in the packet. */
if (payload_len != skb->len - sizeof(*dg)) {
err = -EINVAL;
goto out;
}
if (payload_len > len) {
payload_len = len;
msg->msg_flags |= MSG_TRUNC;
}
/* Place the datagram payload in the user's iovec. */
err = skb_copy_datagram_iovec(skb, sizeof(*dg), msg->msg_iov,
payload_len);
if (err)
goto out;
if (msg->msg_name) {
struct sockaddr_vm *vm_addr;
/* Provide the address of the sender. */
vm_addr = (struct sockaddr_vm *)msg->msg_name;
vsock_addr_init(vm_addr, dg->src.context, dg->src.resource);
msg->msg_namelen = sizeof(*vm_addr);
}
err = payload_len;
out:
skb_free_datagram(&vsk->sk, skb);
return err;
} | 270 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vmci_transport_dgram_dequeue | vmci_transport_dgram_dequeue( struct kiocb * kiocb , struct vsock_sock * vsk , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'vsk', 'msg', 'len', 'flags'] | static int vmci_transport_dgram_dequeue(struct kiocb *kiocb,
struct vsock_sock *vsk,
struct msghdr *msg, size_t len,
int flags)
{
int err;
int noblock;
struct vmci_datagram *dg;
size_t payload_len;
struct sk_buff *skb;
noblock = flags & MSG_DONTWAIT;
if (flags & MSG_OOB || flags & MSG_ERRQUEUE)
return -EOPNOTSUPP;
msg->msg_namelen = 0;
/* Retrieve the head sk_buff from the socket's receive queue. */
err = 0;
skb = skb_recv_datagram(&vsk->sk, flags, noblock, &err);
if (err)
return err;
if (!skb)
return -EAGAIN;
dg = (struct vmci_datagram *)skb->data;
if (!dg)
/* err is 0, meaning we read zero bytes. */
goto out;
payload_len = dg->payload_size;
/* Ensure the sk_buff matches the payload size claimed in the packet. */
if (payload_len != skb->len - sizeof(*dg)) {
err = -EINVAL;
goto out;
}
if (payload_len > len) {
payload_len = len;
msg->msg_flags |= MSG_TRUNC;
}
/* Place the datagram payload in the user's iovec. */
err = skb_copy_datagram_iovec(skb, sizeof(*dg), msg->msg_iov,
payload_len);
if (err)
goto out;
if (msg->msg_name) {
struct sockaddr_vm *vm_addr;
/* Provide the address of the sender. */
vm_addr = (struct sockaddr_vm *)msg->msg_name;
vsock_addr_init(vm_addr, dg->src.context, dg->src.resource);
msg->msg_namelen = sizeof(*vm_addr);
}
err = payload_len;
out:
skb_free_datagram(&vsk->sk, skb);
return err;
} | 270 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.65:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vmci_transport_dgram_dequeue | vmci_transport_dgram_dequeue( struct kiocb * kiocb , struct vsock_sock * vsk , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'vsk', 'msg', 'len', 'flags'] | static int vmci_transport_dgram_dequeue(struct kiocb *kiocb,
struct vsock_sock *vsk,
struct msghdr *msg, size_t len,
int flags)
{
int err;
int noblock;
struct vmci_datagram *dg;
size_t payload_len;
struct sk_buff *skb;
noblock = flags & MSG_DONTWAIT;
if (flags & MSG_OOB || flags & MSG_ERRQUEUE)
return -EOPNOTSUPP;
msg->msg_namelen = 0;
/* Retrieve the head sk_buff from the socket's receive queue. */
err = 0;
skb = skb_recv_datagram(&vsk->sk, flags, noblock, &err);
if (err)
return err;
if (!skb)
return -EAGAIN;
dg = (struct vmci_datagram *)skb->data;
if (!dg)
/* err is 0, meaning we read zero bytes. */
goto out;
payload_len = dg->payload_size;
/* Ensure the sk_buff matches the payload size claimed in the packet. */
if (payload_len != skb->len - sizeof(*dg)) {
err = -EINVAL;
goto out;
}
if (payload_len > len) {
payload_len = len;
msg->msg_flags |= MSG_TRUNC;
}
/* Place the datagram payload in the user's iovec. */
err = skb_copy_datagram_iovec(skb, sizeof(*dg), msg->msg_iov,
payload_len);
if (err)
goto out;
if (msg->msg_name) {
struct sockaddr_vm *vm_addr;
/* Provide the address of the sender. */
vm_addr = (struct sockaddr_vm *)msg->msg_name;
vsock_addr_init(vm_addr, dg->src.context, dg->src.resource);
msg->msg_namelen = sizeof(*vm_addr);
}
err = payload_len;
out:
skb_free_datagram(&vsk->sk, skb);
return err;
} | 270 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vmci_transport_dgram_dequeue | vmci_transport_dgram_dequeue( struct kiocb * kiocb , struct vsock_sock * vsk , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'vsk', 'msg', 'len', 'flags'] | static int vmci_transport_dgram_dequeue(struct kiocb *kiocb,
struct vsock_sock *vsk,
struct msghdr *msg, size_t len,
int flags)
{
int err;
int noblock;
struct vmci_datagram *dg;
size_t payload_len;
struct sk_buff *skb;
noblock = flags & MSG_DONTWAIT;
if (flags & MSG_OOB || flags & MSG_ERRQUEUE)
return -EOPNOTSUPP;
msg->msg_namelen = 0;
/* Retrieve the head sk_buff from the socket's receive queue. */
err = 0;
skb = skb_recv_datagram(&vsk->sk, flags, noblock, &err);
if (err)
return err;
if (!skb)
return -EAGAIN;
dg = (struct vmci_datagram *)skb->data;
if (!dg)
/* err is 0, meaning we read zero bytes. */
goto out;
payload_len = dg->payload_size;
/* Ensure the sk_buff matches the payload size claimed in the packet. */
if (payload_len != skb->len - sizeof(*dg)) {
err = -EINVAL;
goto out;
}
if (payload_len > len) {
payload_len = len;
msg->msg_flags |= MSG_TRUNC;
}
/* Place the datagram payload in the user's iovec. */
err = skb_copy_datagram_iovec(skb, sizeof(*dg), msg->msg_iov,
payload_len);
if (err)
goto out;
if (msg->msg_name) {
struct sockaddr_vm *vm_addr;
/* Provide the address of the sender. */
vm_addr = (struct sockaddr_vm *)msg->msg_name;
vsock_addr_init(vm_addr, dg->src.context, dg->src.resource);
msg->msg_namelen = sizeof(*vm_addr);
}
err = payload_len;
out:
skb_free_datagram(&vsk->sk, skb);
return err;
} | 270 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vmci_transport_dgram_dequeue | vmci_transport_dgram_dequeue( struct kiocb * kiocb , struct vsock_sock * vsk , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'vsk', 'msg', 'len', 'flags'] | static int vmci_transport_dgram_dequeue(struct kiocb *kiocb,
struct vsock_sock *vsk,
struct msghdr *msg, size_t len,
int flags)
{
int err;
int noblock;
struct vmci_datagram *dg;
size_t payload_len;
struct sk_buff *skb;
noblock = flags & MSG_DONTWAIT;
if (flags & MSG_OOB || flags & MSG_ERRQUEUE)
return -EOPNOTSUPP;
msg->msg_namelen = 0;
/* Retrieve the head sk_buff from the socket's receive queue. */
err = 0;
skb = skb_recv_datagram(&vsk->sk, flags, noblock, &err);
if (err)
return err;
if (!skb)
return -EAGAIN;
dg = (struct vmci_datagram *)skb->data;
if (!dg)
/* err is 0, meaning we read zero bytes. */
goto out;
payload_len = dg->payload_size;
/* Ensure the sk_buff matches the payload size claimed in the packet. */
if (payload_len != skb->len - sizeof(*dg)) {
err = -EINVAL;
goto out;
}
if (payload_len > len) {
payload_len = len;
msg->msg_flags |= MSG_TRUNC;
}
/* Place the datagram payload in the user's iovec. */
err = skb_copy_datagram_iovec(skb, sizeof(*dg), msg->msg_iov,
payload_len);
if (err)
goto out;
if (msg->msg_name) {
struct sockaddr_vm *vm_addr;
/* Provide the address of the sender. */
vm_addr = (struct sockaddr_vm *)msg->msg_name;
vsock_addr_init(vm_addr, dg->src.context, dg->src.resource);
msg->msg_namelen = sizeof(*vm_addr);
}
err = payload_len;
out:
skb_free_datagram(&vsk->sk, skb);
return err;
} | 270 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vmci_transport_dgram_dequeue | vmci_transport_dgram_dequeue( struct kiocb * kiocb , struct vsock_sock * vsk , struct msghdr * msg , size_t len , int flags) | ['kiocb', 'vsk', 'msg', 'len', 'flags'] | static int vmci_transport_dgram_dequeue(struct kiocb *kiocb,
struct vsock_sock *vsk,
struct msghdr *msg, size_t len,
int flags)
{
int err;
int noblock;
struct vmci_datagram *dg;
size_t payload_len;
struct sk_buff *skb;
noblock = flags & MSG_DONTWAIT;
if (flags & MSG_OOB || flags & MSG_ERRQUEUE)
return -EOPNOTSUPP;
msg->msg_namelen = 0;
/* Retrieve the head sk_buff from the socket's receive queue. */
err = 0;
skb = skb_recv_datagram(&vsk->sk, flags, noblock, &err);
if (err)
return err;
if (!skb)
return -EAGAIN;
dg = (struct vmci_datagram *)skb->data;
if (!dg)
/* err is 0, meaning we read zero bytes. */
goto out;
payload_len = dg->payload_size;
/* Ensure the sk_buff matches the payload size claimed in the packet. */
if (payload_len != skb->len - sizeof(*dg)) {
err = -EINVAL;
goto out;
}
if (payload_len > len) {
payload_len = len;
msg->msg_flags |= MSG_TRUNC;
}
/* Place the datagram payload in the user's iovec. */
err = skb_copy_datagram_iovec(skb, sizeof(*dg), msg->msg_iov,
payload_len);
if (err)
goto out;
if (msg->msg_name) {
struct sockaddr_vm *vm_addr;
/* Provide the address of the sender. */
vm_addr = (struct sockaddr_vm *)msg->msg_name;
vsock_addr_init(vm_addr, dg->src.context, dg->src.resource);
msg->msg_namelen = sizeof(*vm_addr);
}
err = payload_len;
out:
skb_free_datagram(&vsk->sk, skb);
return err;
} | 270 | True | 1 |
|
CVE-2013-7266 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.0.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.44:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.45:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The mISDN_sock_recvmsg function in drivers/isdn/mISDN/socket.c in the Linux kernel before 3.12.4 does not ensure that a certain length value is consistent with the size of an associated data structure, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | x25_recvmsg | x25_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock *sk = sock->sk;
struct x25_sock *x25 = x25_sk(sk);
struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
size_t copied;
int qbit, header_len;
struct sk_buff *skb;
unsigned char *asmptr;
int rc = -ENOTCONN;
lock_sock(sk);
if (x25->neighbour == NULL)
goto out;
header_len = x25->neighbour->extended ?
X25_EXT_MIN_LEN : X25_STD_MIN_LEN;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
if (flags & MSG_OOB) {
rc = -EINVAL;
if (sock_flag(sk, SOCK_URGINLINE) ||
!skb_peek(&x25->interrupt_in_queue))
goto out;
skb = skb_dequeue(&x25->interrupt_in_queue);
if (!pskb_may_pull(skb, X25_STD_MIN_LEN))
goto out_free_dgram;
skb_pull(skb, X25_STD_MIN_LEN);
/*
* No Q bit information on Interrupt data.
*/
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = 0x00;
}
msg->msg_flags |= MSG_OOB;
} else {
/* Now we can treat all alike */
release_sock(sk);
skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
flags & MSG_DONTWAIT, &rc);
lock_sock(sk);
if (!skb)
goto out;
if (!pskb_may_pull(skb, header_len))
goto out_free_dgram;
qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
skb_pull(skb, header_len);
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
/* Currently, each datagram always contains a complete record */
msg->msg_flags |= MSG_EOR;
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (rc)
goto out_free_dgram;
if (sx25) {
sx25->sx25_family = AF_X25;
sx25->sx25_addr = x25->dest_addr;
}
msg->msg_namelen = sizeof(struct sockaddr_x25);
x25_check_rbuf(sk);
rc = copied;
out_free_dgram:
skb_free_datagram(sk, skb);
out:
release_sock(sk);
return rc;
} | 436 | True | 1 |
|
CVE-2013-7267 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.34:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.48:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.35:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.36:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.58:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.40:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.33:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.42:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.49:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.57:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.64:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.37:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.62:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.6:*:*:*:*:*:*:*', 'cpe_name': []}, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.43:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.44:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The atalk_recvmsg function in net/appletalk/ddp.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | x25_recvmsg | x25_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock *sk = sock->sk;
struct x25_sock *x25 = x25_sk(sk);
struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
size_t copied;
int qbit, header_len;
struct sk_buff *skb;
unsigned char *asmptr;
int rc = -ENOTCONN;
lock_sock(sk);
if (x25->neighbour == NULL)
goto out;
header_len = x25->neighbour->extended ?
X25_EXT_MIN_LEN : X25_STD_MIN_LEN;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
if (flags & MSG_OOB) {
rc = -EINVAL;
if (sock_flag(sk, SOCK_URGINLINE) ||
!skb_peek(&x25->interrupt_in_queue))
goto out;
skb = skb_dequeue(&x25->interrupt_in_queue);
if (!pskb_may_pull(skb, X25_STD_MIN_LEN))
goto out_free_dgram;
skb_pull(skb, X25_STD_MIN_LEN);
/*
* No Q bit information on Interrupt data.
*/
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = 0x00;
}
msg->msg_flags |= MSG_OOB;
} else {
/* Now we can treat all alike */
release_sock(sk);
skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
flags & MSG_DONTWAIT, &rc);
lock_sock(sk);
if (!skb)
goto out;
if (!pskb_may_pull(skb, header_len))
goto out_free_dgram;
qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
skb_pull(skb, header_len);
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
/* Currently, each datagram always contains a complete record */
msg->msg_flags |= MSG_EOR;
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (rc)
goto out_free_dgram;
if (sx25) {
sx25->sx25_family = AF_X25;
sx25->sx25_addr = x25->dest_addr;
}
msg->msg_namelen = sizeof(struct sockaddr_x25);
x25_check_rbuf(sk);
rc = copied;
out_free_dgram:
skb_free_datagram(sk, skb);
out:
release_sock(sk);
return rc;
} | 436 | True | 1 |
|
CVE-2013-7268 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The ipx_recvmsg function in net/ipx/af_ipx.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2014-03-16T04:43Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | x25_recvmsg | x25_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock *sk = sock->sk;
struct x25_sock *x25 = x25_sk(sk);
struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
size_t copied;
int qbit, header_len;
struct sk_buff *skb;
unsigned char *asmptr;
int rc = -ENOTCONN;
lock_sock(sk);
if (x25->neighbour == NULL)
goto out;
header_len = x25->neighbour->extended ?
X25_EXT_MIN_LEN : X25_STD_MIN_LEN;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
if (flags & MSG_OOB) {
rc = -EINVAL;
if (sock_flag(sk, SOCK_URGINLINE) ||
!skb_peek(&x25->interrupt_in_queue))
goto out;
skb = skb_dequeue(&x25->interrupt_in_queue);
if (!pskb_may_pull(skb, X25_STD_MIN_LEN))
goto out_free_dgram;
skb_pull(skb, X25_STD_MIN_LEN);
/*
* No Q bit information on Interrupt data.
*/
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = 0x00;
}
msg->msg_flags |= MSG_OOB;
} else {
/* Now we can treat all alike */
release_sock(sk);
skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
flags & MSG_DONTWAIT, &rc);
lock_sock(sk);
if (!skb)
goto out;
if (!pskb_may_pull(skb, header_len))
goto out_free_dgram;
qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
skb_pull(skb, header_len);
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
/* Currently, each datagram always contains a complete record */
msg->msg_flags |= MSG_EOR;
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (rc)
goto out_free_dgram;
if (sx25) {
sx25->sx25_family = AF_X25;
sx25->sx25_addr = x25->dest_addr;
}
msg->msg_namelen = sizeof(struct sockaddr_x25);
x25_check_rbuf(sk);
rc = copied;
out_free_dgram:
skb_free_datagram(sk, skb);
out:
release_sock(sk);
return rc;
} | 436 | True | 1 |
|
CVE-2013-7269 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64742', 'name': '64742', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90130', 'name': 'linux-kernel-cve20137269-info-disc(90130)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.36:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.48:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc7:*:*:*:*:*:*', 'cpe_name': []}, 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'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.50:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.59:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.66:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.67:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The nr_recvmsg function in net/netrom/af_netrom.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | x25_recvmsg | x25_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock *sk = sock->sk;
struct x25_sock *x25 = x25_sk(sk);
struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
size_t copied;
int qbit, header_len;
struct sk_buff *skb;
unsigned char *asmptr;
int rc = -ENOTCONN;
lock_sock(sk);
if (x25->neighbour == NULL)
goto out;
header_len = x25->neighbour->extended ?
X25_EXT_MIN_LEN : X25_STD_MIN_LEN;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
if (flags & MSG_OOB) {
rc = -EINVAL;
if (sock_flag(sk, SOCK_URGINLINE) ||
!skb_peek(&x25->interrupt_in_queue))
goto out;
skb = skb_dequeue(&x25->interrupt_in_queue);
if (!pskb_may_pull(skb, X25_STD_MIN_LEN))
goto out_free_dgram;
skb_pull(skb, X25_STD_MIN_LEN);
/*
* No Q bit information on Interrupt data.
*/
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = 0x00;
}
msg->msg_flags |= MSG_OOB;
} else {
/* Now we can treat all alike */
release_sock(sk);
skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
flags & MSG_DONTWAIT, &rc);
lock_sock(sk);
if (!skb)
goto out;
if (!pskb_may_pull(skb, header_len))
goto out_free_dgram;
qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
skb_pull(skb, header_len);
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
/* Currently, each datagram always contains a complete record */
msg->msg_flags |= MSG_EOR;
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (rc)
goto out_free_dgram;
if (sx25) {
sx25->sx25_family = AF_X25;
sx25->sx25_addr = x25->dest_addr;
}
msg->msg_namelen = sizeof(struct sockaddr_x25);
x25_check_rbuf(sk);
rc = copied;
out_free_dgram:
skb_free_datagram(sk, skb);
out:
release_sock(sk);
return rc;
} | 436 | True | 1 |
|
CVE-2013-7270 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64744', 'name': '64744', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90131', 'name': 'linux-kernel-cve20137270-info-disc(90131)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The packet_recvmsg function in net/packet/af_packet.c in the Linux kernel before 3.12.4 updates a certain length value before ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | x25_recvmsg | x25_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock *sk = sock->sk;
struct x25_sock *x25 = x25_sk(sk);
struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
size_t copied;
int qbit, header_len;
struct sk_buff *skb;
unsigned char *asmptr;
int rc = -ENOTCONN;
lock_sock(sk);
if (x25->neighbour == NULL)
goto out;
header_len = x25->neighbour->extended ?
X25_EXT_MIN_LEN : X25_STD_MIN_LEN;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
if (flags & MSG_OOB) {
rc = -EINVAL;
if (sock_flag(sk, SOCK_URGINLINE) ||
!skb_peek(&x25->interrupt_in_queue))
goto out;
skb = skb_dequeue(&x25->interrupt_in_queue);
if (!pskb_may_pull(skb, X25_STD_MIN_LEN))
goto out_free_dgram;
skb_pull(skb, X25_STD_MIN_LEN);
/*
* No Q bit information on Interrupt data.
*/
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = 0x00;
}
msg->msg_flags |= MSG_OOB;
} else {
/* Now we can treat all alike */
release_sock(sk);
skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
flags & MSG_DONTWAIT, &rc);
lock_sock(sk);
if (!skb)
goto out;
if (!pskb_may_pull(skb, header_len))
goto out_free_dgram;
qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
skb_pull(skb, header_len);
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
/* Currently, each datagram always contains a complete record */
msg->msg_flags |= MSG_EOR;
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (rc)
goto out_free_dgram;
if (sx25) {
sx25->sx25_family = AF_X25;
sx25->sx25_addr = x25->dest_addr;
}
msg->msg_namelen = sizeof(struct sockaddr_x25);
x25_check_rbuf(sk);
rc = copied;
out_free_dgram:
skb_free_datagram(sk, skb);
out:
release_sock(sk);
return rc;
} | 436 | True | 1 |
|
CVE-2013-7271 | False | False | False | False | AV:L/AC:L/Au:N/C:C/I:N/A:N | LOCAL | LOW | NONE | COMPLETE | NONE | NONE | 4.9 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.4', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/31/7', 'name': '[oss-security] 20131231 Re: CVE request: Linux kernel: net: memory leak in recvmsg handlermsg_name & msg_namelen logic', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1039845', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'https://github.com/torvalds/linux/commit/f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f3d3342602f8bcbf37d7c46641cb9bca7618eb1c', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://secunia.com/advisories/56036', 'name': '56036', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.securityfocus.com/bid/64746', 'name': '64746', 'refsource': 'BID', 'tags': []}, {'url': 'http://secunia.com/advisories/55882', 'name': '55882', 'refsource': 'SECUNIA', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2109-1', 'name': 'USN-2109-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2110-1', 'name': 'USN-2110-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2129-1', 'name': 'USN-2129-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2128-1', 'name': 'USN-2128-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'https://exchange.xforce.ibmcloud.com/vulnerabilities/90132', 'name': 'linux-kernel-cve20137271-info-disc(90132)', 'refsource': 'XF', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.41:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The x25_recvmsg function in net/x25/af_x25.c in the Linux kernel before 3.12.4 updates a certain length value without ensuring that an associated data structure has been initialized, which allows local users to obtain sensitive information from kernel memory via a (1) recvfrom, (2) recvmmsg, or (3) recvmsg system call.'}] | 2017-08-29T01:34Z | 2014-01-06T16:55Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Hannes Frederic Sowa | 2013-11-21 03:14:22+01:00 | net: rework recvmsg handler msg_name and msg_namelen logic
This patch now always passes msg->msg_namelen as 0. recvmsg handlers must
set msg_namelen to the proper size <= sizeof(struct sockaddr_storage)
to return msg_name to the user.
This prevents numerous uninitialized memory leaks we had in the
recvmsg handlers and makes it harder for new code to accidentally leak
uninitialized memory.
Optimize for the case recvfrom is called with NULL as address. We don't
need to copy the address at all, so set it to NULL before invoking the
recvmsg handler. We can do so, because all the recvmsg handlers must
cope with the case a plain read() is called on them. read() also sets
msg_name to NULL.
Also document these changes in include/linux/net.h as suggested by David
Miller.
Changes since RFC:
Set msg->msg_name = NULL if user specified a NULL in msg_name but had a
non-null msg_namelen in verify_iovec/verify_compat_iovec. This doesn't
affect sendto as it would bail out earlier while trying to copy-in the
address. It also more naturally reflects the logic by the callers of
verify_iovec.
With this change in place I could remove "
if (!uaddr || msg_sys->msg_namelen == 0)
msg->msg_name = NULL
".
This change does not alter the user visible error logic as we ignore
msg_namelen as long as msg_name is NULL.
Also remove two unnecessary curly brackets in ___sys_recvmsg and change
comments to netdev style.
Cc: David Miller <[email protected]>
Suggested-by: Eric Dumazet <[email protected]>
Signed-off-by: Hannes Frederic Sowa <[email protected]>
Signed-off-by: David S. Miller <[email protected]> | f3d3342602f8bcbf37d7c46641cb9bca7618eb1c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | x25_recvmsg | x25_recvmsg( struct kiocb * iocb , struct socket * sock , struct msghdr * msg , size_t size , int flags) | ['iocb', 'sock', 'msg', 'size', 'flags'] | static int x25_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size,
int flags)
{
struct sock *sk = sock->sk;
struct x25_sock *x25 = x25_sk(sk);
struct sockaddr_x25 *sx25 = (struct sockaddr_x25 *)msg->msg_name;
size_t copied;
int qbit, header_len;
struct sk_buff *skb;
unsigned char *asmptr;
int rc = -ENOTCONN;
lock_sock(sk);
if (x25->neighbour == NULL)
goto out;
header_len = x25->neighbour->extended ?
X25_EXT_MIN_LEN : X25_STD_MIN_LEN;
/*
* This works for seqpacket too. The receiver has ordered the queue for
* us! We do one quick check first though
*/
if (sk->sk_state != TCP_ESTABLISHED)
goto out;
if (flags & MSG_OOB) {
rc = -EINVAL;
if (sock_flag(sk, SOCK_URGINLINE) ||
!skb_peek(&x25->interrupt_in_queue))
goto out;
skb = skb_dequeue(&x25->interrupt_in_queue);
if (!pskb_may_pull(skb, X25_STD_MIN_LEN))
goto out_free_dgram;
skb_pull(skb, X25_STD_MIN_LEN);
/*
* No Q bit information on Interrupt data.
*/
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = 0x00;
}
msg->msg_flags |= MSG_OOB;
} else {
/* Now we can treat all alike */
release_sock(sk);
skb = skb_recv_datagram(sk, flags & ~MSG_DONTWAIT,
flags & MSG_DONTWAIT, &rc);
lock_sock(sk);
if (!skb)
goto out;
if (!pskb_may_pull(skb, header_len))
goto out_free_dgram;
qbit = (skb->data[0] & X25_Q_BIT) == X25_Q_BIT;
skb_pull(skb, header_len);
if (test_bit(X25_Q_BIT_FLAG, &x25->flags)) {
asmptr = skb_push(skb, 1);
*asmptr = qbit;
}
}
skb_reset_transport_header(skb);
copied = skb->len;
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
}
/* Currently, each datagram always contains a complete record */
msg->msg_flags |= MSG_EOR;
rc = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
if (rc)
goto out_free_dgram;
if (sx25) {
sx25->sx25_family = AF_X25;
sx25->sx25_addr = x25->dest_addr;
}
msg->msg_namelen = sizeof(struct sockaddr_x25);
x25_check_rbuf(sk);
rc = copied;
out_free_dgram:
skb_free_datagram(sk, skb);
out:
release_sock(sk);
return rc;
} | 436 | True | 1 |
|
CVE-2013-7026 | False | False | False | False | AV:L/AC:M/Au:N/C:N/I:N/A:C | LOCAL | MEDIUM | NONE | NONE | NONE | COMPLETE | 4.7 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a399b29dfbaaaf91162b2dc5a5875dd51bbfa2a1', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a399b29dfbaaaf91162b2dc5a5875dd51bbfa2a1', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.2', 'name': 'http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.2', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/a399b29dfbaaaf91162b2dc5a5875dd51bbfa2a1', 'name': 'https://github.com/torvalds/linux/commit/a399b29dfbaaaf91162b2dc5a5875dd51bbfa2a1', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.ubuntu.com/usn/USN-2075-1', 'name': 'USN-2075-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2070-1', 'name': 'USN-2070-1', 'refsource': 'UBUNTU', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-362'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.68:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.52:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.34:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.35:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.36:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.51:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.58:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.46:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.47:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.48:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.15:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.37:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.19:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.33:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.40:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.49:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.57:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.64:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.27:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.29:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.4:*:*:*:*:*:*:*', 'cpe_name': []}, 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'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.6:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'Multiple race conditions in ipc/shm.c in the Linux kernel before 3.12.2 allow local users to cause a denial of service (use-after-free and system crash) or possibly have unspecified other impact via a crafted application that uses shmctl IPC_RMID operations in conjunction with other shm system calls.'}] | 2014-01-08T04:42Z | 2013-12-09T18:55Z | Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') | The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. |
This can have security implications when the expected synchronization is in security-critical code, such as recording whether a user is authenticated or modifying important state information that should not be influenced by an outsider.
A race condition occurs within concurrent environments, and is effectively a property of a code sequence. Depending on the context, a code sequence may be in the form of a function call, a small number of instructions, a series of program invocations, etc.
A race condition violates these properties, which are closely related:
Exclusivity - the code sequence is given exclusive access to the shared resource, i.e., no other code sequence can modify properties of the shared resource before the original sequence has completed execution.
Atomicity - the code sequence is behaviorally atomic, i.e., no other thread or process can concurrently execute the same sequence of instructions (or a subset) against the same resource.
A race condition exists when an "interfering code sequence" can still access the shared resource, violating exclusivity. Programmers may assume that certain code sequences execute too quickly to be affected by an interfering code sequence; when they are not, this violates atomicity. For example, the single "x++" statement may appear atomic at the code layer, but it is actually non-atomic at the instruction layer, since it involves a read (the original value of x), followed by a computation (x+1), followed by a write (save the result to x).
The interfering code sequence could be "trusted" or "untrusted." A trusted interfering code sequence occurs within the program; it cannot be modified by the attacker, and it can only be invoked indirectly. An untrusted interfering code sequence can be authored directly by the attacker, and typically it is external to the vulnerable program.
| https://cwe.mitre.org/data/definitions/362.html | 0 | Greg Thelen | 2013-11-21 14:32:00-08:00 | ipc,shm: fix shm_file deletion races
When IPC_RMID races with other shm operations there's potential for
use-after-free of the shm object's associated file (shm_file).
Here's the race before this patch:
TASK 1 TASK 2
------ ------
shm_rmid()
ipc_lock_object()
shmctl()
shp = shm_obtain_object_check()
shm_destroy()
shum_unlock()
fput(shp->shm_file)
ipc_lock_object()
shmem_lock(shp->shm_file)
<OOPS>
The oops is caused because shm_destroy() calls fput() after dropping the
ipc_lock. fput() clears the file's f_inode, f_path.dentry, and
f_path.mnt, which causes various NULL pointer references in task 2. I
reliably see the oops in task 2 if with shmlock, shmu
This patch fixes the races by:
1) set shm_file=NULL in shm_destroy() while holding ipc_object_lock().
2) modify at risk operations to check shm_file while holding
ipc_object_lock().
Example workloads, which each trigger oops...
Workload 1:
while true; do
id=$(shmget 1 4096)
shm_rmid $id &
shmlock $id &
wait
done
The oops stack shows accessing NULL f_inode due to racing fput:
_raw_spin_lock
shmem_lock
SyS_shmctl
Workload 2:
while true; do
id=$(shmget 1 4096)
shmat $id 4096 &
shm_rmid $id &
wait
done
The oops stack is similar to workload 1 due to NULL f_inode:
touch_atime
shmem_mmap
shm_mmap
mmap_region
do_mmap_pgoff
do_shmat
SyS_shmat
Workload 3:
while true; do
id=$(shmget 1 4096)
shmlock $id
shm_rmid $id &
shmunlock $id &
wait
done
The oops stack shows second fput tripping on an NULL f_inode. The
first fput() completed via from shm_destroy(), but a racing thread did
a get_file() and queued this fput():
locks_remove_flock
__fput
____fput
task_work_run
do_notify_resume
int_signal
Fixes: c2c737a0461e ("ipc,shm: shorten critical region for shmat")
Fixes: 2caacaa82a51 ("ipc,shm: shorten critical region for shmctl")
Signed-off-by: Greg Thelen <[email protected]>
Cc: Davidlohr Bueso <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Manfred Spraul <[email protected]>
Cc: <[email protected]> # 3.10.17+ 3.11.6+
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]> | a399b29dfbaaaf91162b2dc5a5875dd51bbfa2a1 | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | shm_destroy | shm_destroy( struct ipc_namespace * ns , struct shmid_kernel * shp) | ['ns', 'shp'] | static void shm_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp)
{
ns->shm_tot -= (shp->shm_segsz + PAGE_SIZE - 1) >> PAGE_SHIFT;
shm_rmid(ns, shp);
shm_unlock(shp);
if (!is_file_hugepages(shp->shm_file))
shmem_lock(shp->shm_file, 0, shp->mlock_user);
else if (shp->mlock_user)
user_shm_unlock(file_inode(shp->shm_file)->i_size,
shp->mlock_user);
fput (shp->shm_file);
ipc_rcu_putref(shp, shm_rcu_free);
} | 103 | True | 1 |
|
CVE-2013-6367 | False | False | False | False | AV:A/AC:M/Au:N/C:N/I:N/A:C | ADJACENT_NETWORK | MEDIUM | NONE | NONE | NONE | COMPLETE | 5.7 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'http://www.openwall.com/lists/oss-security/2013/12/12/12', 'name': '[oss-security] 20131212 Re: [vs-plain] kvm issues', 'refsource': 'MLIST', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b963a22e6d1a266a67e9eecc88134713fd54775c', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b963a22e6d1a266a67e9eecc88134713fd54775c', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032207', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032207', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'https://github.com/torvalds/linux/commit/b963a22e6d1a266a67e9eecc88134713fd54775c', 'name': 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'cpe:2.3:o:linux:linux_kernel:3.2.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.14:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The apic_get_tmcct function in arch/x86/kvm/lapic.c in the KVM subsystem in the Linux kernel through 3.12.5 allows guest OS users to cause a denial of service (divide-by-zero error and host OS crash) via crafted modifications of the TMICT value.'}] | 2018-01-09T02:29Z | 2013-12-14T18:08Z | Numeric Errors | Weaknesses in this category are related to improper calculation or conversion of numbers. | https://cwe.mitre.org/data/definitions/189.html | 1 | Andy Honig | 2013-11-19 14:12:18-08:00 | KVM: x86: Fix potential divide by 0 in lapic (CVE-2013-6367)
Under guest controllable circumstances apic_get_tmcct will execute a
divide by zero and cause a crash. If the guest cpuid support
tsc deadline timers and performs the following sequence of requests
the host will crash.
- Set the mode to periodic
- Set the TMICT to 0
- Set the mode bits to 11 (neither periodic, nor one shot, nor tsc deadline)
- Set the TMICT to non-zero.
Then the lapic_timer.period will be 0, but the TMICT will not be. If the
guest then reads from the TMCCT then the host will perform a divide by 0.
This patch ensures that if the lapic_timer.period is 0, then the division
does not occur.
Reported-by: Andrew Honig <[email protected]>
Cc: [email protected]
Signed-off-by: Andrew Honig <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]> | b963a22e6d1a266a67e9eecc88134713fd54775c | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | apic_get_tmcct | apic_get_tmcct( struct kvm_lapic * apic) | ['apic'] | static u32 apic_get_tmcct(struct kvm_lapic *apic)
{
ktime_t remaining;
s64 ns;
u32 tmcct;
ASSERT(apic != NULL);
/* if initial count is 0, current count should also be 0 */
if (kvm_apic_get_reg(apic, APIC_TMICT) == 0)
return 0;
remaining = hrtimer_get_remaining(&apic->lapic_timer.timer);
if (ktime_to_ns(remaining) < 0)
remaining = ktime_set(0, 0);
ns = mod_64(ktime_to_ns(remaining), apic->lapic_timer.period);
tmcct = div64_u64(ns,
(APIC_BUS_CYCLE_NS * apic->divide_count));
return tmcct;
} | 103 | True | 1 |
||
CVE-2013-6368 | False | False | False | False | AV:L/AC:H/Au:N/C:C/I:C/A:C | LOCAL | HIGH | NONE | COMPLETE | COMPLETE | COMPLETE | 6.2 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/12/12', 'name': '[oss-security] 20131212 Re: [vs-plain] kvm issues', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.securityfocus.com/bid/64291', 'name': '64291', 'refsource': 'BID', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-updates/2014-02/msg00045.html', 'name': 'openSUSE-SU-2014:0247', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0163.html', 'name': 'RHSA-2014:0163', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html', 'name': 'openSUSE-SU-2014:0204', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html', 'name': 'openSUSE-SU-2014:0205', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2133-1', 'name': 'USN-2133-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2134-1', 'name': 'USN-2134-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0284.html', 'name': 'RHSA-2014:0284', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2013-1801.html', 'name': 'RHSA-2013:1801', 'refsource': 'REDHAT', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}]}, {'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The KVM subsystem in the Linux kernel through 3.12.5 allows local users to gain privileges or cause a denial of service (system crash) via a VAPIC synchronization operation involving a page-end address.'}] | 2019-04-22T17:48Z | 2013-12-14T18:08Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Andy Honig | 2013-11-20 10:23:22-08:00 | KVM: x86: Convert vapic synchronization to _cached functions (CVE-2013-6368)
In kvm_lapic_sync_from_vapic and kvm_lapic_sync_to_vapic there is the
potential to corrupt kernel memory if userspace provides an address that
is at the end of a page. This patches concerts those functions to use
kvm_write_guest_cached and kvm_read_guest_cached. It also checks the
vapic_address specified by userspace during ioctl processing and returns
an error to userspace if the address is not a valid GPA.
This is generally not guest triggerable, because the required write is
done by firmware that runs before the guest. Also, it only affects AMD
processors and oldish Intel that do not have the FlexPriority feature
(unless you disable FlexPriority, of course; then newer processors are
also affected).
Fixes: b93463aa59d6 ('KVM: Accelerated apic support')
Reported-by: Andrew Honig <[email protected]>
Cc: [email protected]
Signed-off-by: Andrew Honig <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]> | fda4e2e85589191b123d31cdc21fd33ee70f50fd | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | kvm_lapic_set_vapic_addr | kvm_lapic_set_vapic_addr( struct kvm_vcpu * vcpu , gpa_t vapic_addr) | ['vcpu', 'vapic_addr'] | void kvm_lapic_set_vapic_addr(struct kvm_vcpu *vcpu, gpa_t vapic_addr)
{
vcpu->arch.apic->vapic_addr = vapic_addr;
if (vapic_addr)
__set_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention);
else
__clear_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention);
} | 51 | True | 1 |
|
CVE-2013-6368 | False | False | False | False | AV:L/AC:H/Au:N/C:C/I:C/A:C | LOCAL | HIGH | NONE | COMPLETE | COMPLETE | COMPLETE | 6.2 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/12/12', 'name': '[oss-security] 20131212 Re: [vs-plain] kvm issues', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.securityfocus.com/bid/64291', 'name': '64291', 'refsource': 'BID', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-updates/2014-02/msg00045.html', 'name': 'openSUSE-SU-2014:0247', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0163.html', 'name': 'RHSA-2014:0163', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html', 'name': 'openSUSE-SU-2014:0204', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html', 'name': 'openSUSE-SU-2014:0205', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2133-1', 'name': 'USN-2133-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2134-1', 'name': 'USN-2134-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0284.html', 'name': 'RHSA-2014:0284', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2013-1801.html', 'name': 'RHSA-2013:1801', 'refsource': 'REDHAT', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.8:*:*:*:*:*:*:*', 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}]}, {'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The KVM subsystem in the Linux kernel through 3.12.5 allows local users to gain privileges or cause a denial of service (system crash) via a VAPIC synchronization operation involving a page-end address.'}] | 2019-04-22T17:48Z | 2013-12-14T18:08Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Andy Honig | 2013-11-20 10:23:22-08:00 | KVM: x86: Convert vapic synchronization to _cached functions (CVE-2013-6368)
In kvm_lapic_sync_from_vapic and kvm_lapic_sync_to_vapic there is the
potential to corrupt kernel memory if userspace provides an address that
is at the end of a page. This patches concerts those functions to use
kvm_write_guest_cached and kvm_read_guest_cached. It also checks the
vapic_address specified by userspace during ioctl processing and returns
an error to userspace if the address is not a valid GPA.
This is generally not guest triggerable, because the required write is
done by firmware that runs before the guest. Also, it only affects AMD
processors and oldish Intel that do not have the FlexPriority feature
(unless you disable FlexPriority, of course; then newer processors are
also affected).
Fixes: b93463aa59d6 ('KVM: Accelerated apic support')
Reported-by: Andrew Honig <[email protected]>
Cc: [email protected]
Signed-off-by: Andrew Honig <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]> | fda4e2e85589191b123d31cdc21fd33ee70f50fd | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | kvm_lapic_sync_from_vapic | kvm_lapic_sync_from_vapic( struct kvm_vcpu * vcpu) | ['vcpu'] | void kvm_lapic_sync_from_vapic(struct kvm_vcpu *vcpu)
{
u32 data;
void *vapic;
if (test_bit(KVM_APIC_PV_EOI_PENDING, &vcpu->arch.apic_attention))
apic_sync_pv_eoi_from_guest(vcpu, vcpu->arch.apic);
if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention))
return;
vapic = kmap_atomic(vcpu->arch.apic->vapic_page);
data = *(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr));
kunmap_atomic(vapic);
apic_set_tpr(vcpu->arch.apic, data & 0xff);
} | 111 | True | 1 |
|
CVE-2013-6368 | False | False | False | False | AV:L/AC:H/Au:N/C:C/I:C/A:C | LOCAL | HIGH | NONE | COMPLETE | COMPLETE | COMPLETE | 6.2 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/12/12', 'name': '[oss-security] 20131212 Re: [vs-plain] kvm issues', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.securityfocus.com/bid/64291', 'name': '64291', 'refsource': 'BID', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-updates/2014-02/msg00045.html', 'name': 'openSUSE-SU-2014:0247', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0163.html', 'name': 'RHSA-2014:0163', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html', 'name': 'openSUSE-SU-2014:0204', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html', 'name': 'openSUSE-SU-2014:0205', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2133-1', 'name': 'USN-2133-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2134-1', 'name': 'USN-2134-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0284.html', 'name': 'RHSA-2014:0284', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2013-1801.html', 'name': 'RHSA-2013:1801', 'refsource': 'REDHAT', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}]}, {'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The KVM subsystem in the Linux kernel through 3.12.5 allows local users to gain privileges or cause a denial of service (system crash) via a VAPIC synchronization operation involving a page-end address.'}] | 2019-04-22T17:48Z | 2013-12-14T18:08Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Andy Honig | 2013-11-20 10:23:22-08:00 | KVM: x86: Convert vapic synchronization to _cached functions (CVE-2013-6368)
In kvm_lapic_sync_from_vapic and kvm_lapic_sync_to_vapic there is the
potential to corrupt kernel memory if userspace provides an address that
is at the end of a page. This patches concerts those functions to use
kvm_write_guest_cached and kvm_read_guest_cached. It also checks the
vapic_address specified by userspace during ioctl processing and returns
an error to userspace if the address is not a valid GPA.
This is generally not guest triggerable, because the required write is
done by firmware that runs before the guest. Also, it only affects AMD
processors and oldish Intel that do not have the FlexPriority feature
(unless you disable FlexPriority, of course; then newer processors are
also affected).
Fixes: b93463aa59d6 ('KVM: Accelerated apic support')
Reported-by: Andrew Honig <[email protected]>
Cc: [email protected]
Signed-off-by: Andrew Honig <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]> | fda4e2e85589191b123d31cdc21fd33ee70f50fd | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | kvm_lapic_sync_to_vapic | kvm_lapic_sync_to_vapic( struct kvm_vcpu * vcpu) | ['vcpu'] | void kvm_lapic_sync_to_vapic(struct kvm_vcpu *vcpu)
{
u32 data, tpr;
int max_irr, max_isr;
struct kvm_lapic *apic = vcpu->arch.apic;
void *vapic;
apic_sync_pv_eoi_to_guest(vcpu, apic);
if (!test_bit(KVM_APIC_CHECK_VAPIC, &vcpu->arch.apic_attention))
return;
tpr = kvm_apic_get_reg(apic, APIC_TASKPRI) & 0xff;
max_irr = apic_find_highest_irr(apic);
if (max_irr < 0)
max_irr = 0;
max_isr = apic_find_highest_isr(apic);
if (max_isr < 0)
max_isr = 0;
data = (tpr & 0xff) | ((max_isr & 0xf0) << 8) | (max_irr << 24);
vapic = kmap_atomic(vcpu->arch.apic->vapic_page);
*(u32 *)(vapic + offset_in_page(vcpu->arch.apic->vapic_addr)) = data;
kunmap_atomic(vapic);
} | 169 | True | 1 |
|
CVE-2013-6368 | False | False | False | False | AV:L/AC:H/Au:N/C:C/I:C/A:C | LOCAL | HIGH | NONE | COMPLETE | COMPLETE | COMPLETE | 6.2 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/12/12', 'name': '[oss-security] 20131212 Re: [vs-plain] kvm issues', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.securityfocus.com/bid/64291', 'name': '64291', 'refsource': 'BID', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-updates/2014-02/msg00045.html', 'name': 'openSUSE-SU-2014:0247', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0163.html', 'name': 'RHSA-2014:0163', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html', 'name': 'openSUSE-SU-2014:0204', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html', 'name': 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'RHSA-2013:1801', 'refsource': 'REDHAT', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc6:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.12.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.11.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.16:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.24:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.31:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.39:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.55:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.61:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}]}, {'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The KVM subsystem in the Linux kernel through 3.12.5 allows local users to gain privileges or cause a denial of service (system crash) via a VAPIC synchronization operation involving a page-end address.'}] | 2019-04-22T17:48Z | 2013-12-14T18:08Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Andy Honig | 2013-11-20 10:23:22-08:00 | KVM: x86: Convert vapic synchronization to _cached functions (CVE-2013-6368)
In kvm_lapic_sync_from_vapic and kvm_lapic_sync_to_vapic there is the
potential to corrupt kernel memory if userspace provides an address that
is at the end of a page. This patches concerts those functions to use
kvm_write_guest_cached and kvm_read_guest_cached. It also checks the
vapic_address specified by userspace during ioctl processing and returns
an error to userspace if the address is not a valid GPA.
This is generally not guest triggerable, because the required write is
done by firmware that runs before the guest. Also, it only affects AMD
processors and oldish Intel that do not have the FlexPriority feature
(unless you disable FlexPriority, of course; then newer processors are
also affected).
Fixes: b93463aa59d6 ('KVM: Accelerated apic support')
Reported-by: Andrew Honig <[email protected]>
Cc: [email protected]
Signed-off-by: Andrew Honig <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]> | fda4e2e85589191b123d31cdc21fd33ee70f50fd | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | __vcpu_run | __vcpu_run( struct kvm_vcpu * vcpu) | ['vcpu'] | static int __vcpu_run(struct kvm_vcpu *vcpu)
{
int r;
struct kvm *kvm = vcpu->kvm;
vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
r = vapic_enter(vcpu);
if (r) {
srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
return r;
}
r = 1;
while (r > 0) {
if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE &&
!vcpu->arch.apf.halted)
r = vcpu_enter_guest(vcpu);
else {
srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
kvm_vcpu_block(vcpu);
vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) {
kvm_apic_accept_events(vcpu);
switch(vcpu->arch.mp_state) {
case KVM_MP_STATE_HALTED:
vcpu->arch.pv.pv_unhalted = false;
vcpu->arch.mp_state =
KVM_MP_STATE_RUNNABLE;
case KVM_MP_STATE_RUNNABLE:
vcpu->arch.apf.halted = false;
break;
case KVM_MP_STATE_INIT_RECEIVED:
break;
default:
r = -EINTR;
break;
}
}
}
if (r <= 0)
break;
clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests);
if (kvm_cpu_has_pending_timer(vcpu))
kvm_inject_pending_timer_irqs(vcpu);
if (dm_request_for_irq_injection(vcpu)) {
r = -EINTR;
vcpu->run->exit_reason = KVM_EXIT_INTR;
++vcpu->stat.request_irq_exits;
}
kvm_check_async_pf_completion(vcpu);
if (signal_pending(current)) {
r = -EINTR;
vcpu->run->exit_reason = KVM_EXIT_INTR;
++vcpu->stat.signal_exits;
}
if (need_resched()) {
srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
kvm_resched(vcpu);
vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
}
}
srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
vapic_exit(vcpu);
return r;
} | 357 | True | 1 |
|
CVE-2013-6368 | False | False | False | False | AV:L/AC:H/Au:N/C:C/I:C/A:C | LOCAL | HIGH | NONE | COMPLETE | COMPLETE | COMPLETE | 6.2 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/12/12', 'name': '[oss-security] 20131212 Re: [vs-plain] kvm issues', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.securityfocus.com/bid/64291', 'name': '64291', 'refsource': 'BID', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-updates/2014-02/msg00045.html', 'name': 'openSUSE-SU-2014:0247', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0163.html', 'name': 'RHSA-2014:0163', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html', 'name': 'openSUSE-SU-2014:0204', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html', 'name': 'openSUSE-SU-2014:0205', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2133-1', 'name': 'USN-2133-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2134-1', 'name': 'USN-2134-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0284.html', 'name': 'RHSA-2014:0284', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2013-1801.html', 'name': 'RHSA-2013:1801', 'refsource': 'REDHAT', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.22:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.38:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.63:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.5:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.18:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc4:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc2:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.26:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc5:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.23:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.12:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.7:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 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'cpe:2.3:o:linux:linux_kernel:3.9.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2:rc3:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.13:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.20:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.28:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3:rc7:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.3.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}]}, {'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The KVM subsystem in the Linux kernel through 3.12.5 allows local users to gain privileges or cause a denial of service (system crash) via a VAPIC synchronization operation involving a page-end address.'}] | 2019-04-22T17:48Z | 2013-12-14T18:08Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Andy Honig | 2013-11-20 10:23:22-08:00 | KVM: x86: Convert vapic synchronization to _cached functions (CVE-2013-6368)
In kvm_lapic_sync_from_vapic and kvm_lapic_sync_to_vapic there is the
potential to corrupt kernel memory if userspace provides an address that
is at the end of a page. This patches concerts those functions to use
kvm_write_guest_cached and kvm_read_guest_cached. It also checks the
vapic_address specified by userspace during ioctl processing and returns
an error to userspace if the address is not a valid GPA.
This is generally not guest triggerable, because the required write is
done by firmware that runs before the guest. Also, it only affects AMD
processors and oldish Intel that do not have the FlexPriority feature
(unless you disable FlexPriority, of course; then newer processors are
also affected).
Fixes: b93463aa59d6 ('KVM: Accelerated apic support')
Reported-by: Andrew Honig <[email protected]>
Cc: [email protected]
Signed-off-by: Andrew Honig <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]> | fda4e2e85589191b123d31cdc21fd33ee70f50fd | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | kvm_arch_vcpu_ioctl | kvm_arch_vcpu_ioctl( struct file * filp , unsigned int ioctl , unsigned long arg) | ['filp', 'ioctl', 'arg'] | long kvm_arch_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
struct kvm_vcpu *vcpu = filp->private_data;
void __user *argp = (void __user *)arg;
int r;
union {
struct kvm_lapic_state *lapic;
struct kvm_xsave *xsave;
struct kvm_xcrs *xcrs;
void *buffer;
} u;
u.buffer = NULL;
switch (ioctl) {
case KVM_GET_LAPIC: {
r = -EINVAL;
if (!vcpu->arch.apic)
goto out;
u.lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL);
r = -ENOMEM;
if (!u.lapic)
goto out;
r = kvm_vcpu_ioctl_get_lapic(vcpu, u.lapic);
if (r)
goto out;
r = -EFAULT;
if (copy_to_user(argp, u.lapic, sizeof(struct kvm_lapic_state)))
goto out;
r = 0;
break;
}
case KVM_SET_LAPIC: {
r = -EINVAL;
if (!vcpu->arch.apic)
goto out;
u.lapic = memdup_user(argp, sizeof(*u.lapic));
if (IS_ERR(u.lapic))
return PTR_ERR(u.lapic);
r = kvm_vcpu_ioctl_set_lapic(vcpu, u.lapic);
break;
}
case KVM_INTERRUPT: {
struct kvm_interrupt irq;
r = -EFAULT;
if (copy_from_user(&irq, argp, sizeof irq))
goto out;
r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
break;
}
case KVM_NMI: {
r = kvm_vcpu_ioctl_nmi(vcpu);
break;
}
case KVM_SET_CPUID: {
struct kvm_cpuid __user *cpuid_arg = argp;
struct kvm_cpuid cpuid;
r = -EFAULT;
if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
goto out;
r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
break;
}
case KVM_SET_CPUID2: {
struct kvm_cpuid2 __user *cpuid_arg = argp;
struct kvm_cpuid2 cpuid;
r = -EFAULT;
if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
goto out;
r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid,
cpuid_arg->entries);
break;
}
case KVM_GET_CPUID2: {
struct kvm_cpuid2 __user *cpuid_arg = argp;
struct kvm_cpuid2 cpuid;
r = -EFAULT;
if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
goto out;
r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid,
cpuid_arg->entries);
if (r)
goto out;
r = -EFAULT;
if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid))
goto out;
r = 0;
break;
}
case KVM_GET_MSRS:
r = msr_io(vcpu, argp, kvm_get_msr, 1);
break;
case KVM_SET_MSRS:
r = msr_io(vcpu, argp, do_set_msr, 0);
break;
case KVM_TPR_ACCESS_REPORTING: {
struct kvm_tpr_access_ctl tac;
r = -EFAULT;
if (copy_from_user(&tac, argp, sizeof tac))
goto out;
r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac);
if (r)
goto out;
r = -EFAULT;
if (copy_to_user(argp, &tac, sizeof tac))
goto out;
r = 0;
break;
};
case KVM_SET_VAPIC_ADDR: {
struct kvm_vapic_addr va;
r = -EINVAL;
if (!irqchip_in_kernel(vcpu->kvm))
goto out;
r = -EFAULT;
if (copy_from_user(&va, argp, sizeof va))
goto out;
r = 0;
kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr);
break;
}
case KVM_X86_SETUP_MCE: {
u64 mcg_cap;
r = -EFAULT;
if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap))
goto out;
r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap);
break;
}
case KVM_X86_SET_MCE: {
struct kvm_x86_mce mce;
r = -EFAULT;
if (copy_from_user(&mce, argp, sizeof mce))
goto out;
r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce);
break;
}
case KVM_GET_VCPU_EVENTS: {
struct kvm_vcpu_events events;
kvm_vcpu_ioctl_x86_get_vcpu_events(vcpu, &events);
r = -EFAULT;
if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events)))
break;
r = 0;
break;
}
case KVM_SET_VCPU_EVENTS: {
struct kvm_vcpu_events events;
r = -EFAULT;
if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events)))
break;
r = kvm_vcpu_ioctl_x86_set_vcpu_events(vcpu, &events);
break;
}
case KVM_GET_DEBUGREGS: {
struct kvm_debugregs dbgregs;
kvm_vcpu_ioctl_x86_get_debugregs(vcpu, &dbgregs);
r = -EFAULT;
if (copy_to_user(argp, &dbgregs,
sizeof(struct kvm_debugregs)))
break;
r = 0;
break;
}
case KVM_SET_DEBUGREGS: {
struct kvm_debugregs dbgregs;
r = -EFAULT;
if (copy_from_user(&dbgregs, argp,
sizeof(struct kvm_debugregs)))
break;
r = kvm_vcpu_ioctl_x86_set_debugregs(vcpu, &dbgregs);
break;
}
case KVM_GET_XSAVE: {
u.xsave = kzalloc(sizeof(struct kvm_xsave), GFP_KERNEL);
r = -ENOMEM;
if (!u.xsave)
break;
kvm_vcpu_ioctl_x86_get_xsave(vcpu, u.xsave);
r = -EFAULT;
if (copy_to_user(argp, u.xsave, sizeof(struct kvm_xsave)))
break;
r = 0;
break;
}
case KVM_SET_XSAVE: {
u.xsave = memdup_user(argp, sizeof(*u.xsave));
if (IS_ERR(u.xsave))
return PTR_ERR(u.xsave);
r = kvm_vcpu_ioctl_x86_set_xsave(vcpu, u.xsave);
break;
}
case KVM_GET_XCRS: {
u.xcrs = kzalloc(sizeof(struct kvm_xcrs), GFP_KERNEL);
r = -ENOMEM;
if (!u.xcrs)
break;
kvm_vcpu_ioctl_x86_get_xcrs(vcpu, u.xcrs);
r = -EFAULT;
if (copy_to_user(argp, u.xcrs,
sizeof(struct kvm_xcrs)))
break;
r = 0;
break;
}
case KVM_SET_XCRS: {
u.xcrs = memdup_user(argp, sizeof(*u.xcrs));
if (IS_ERR(u.xcrs))
return PTR_ERR(u.xcrs);
r = kvm_vcpu_ioctl_x86_set_xcrs(vcpu, u.xcrs);
break;
}
case KVM_SET_TSC_KHZ: {
u32 user_tsc_khz;
r = -EINVAL;
user_tsc_khz = (u32)arg;
if (user_tsc_khz >= kvm_max_guest_tsc_khz)
goto out;
if (user_tsc_khz == 0)
user_tsc_khz = tsc_khz;
kvm_set_tsc_khz(vcpu, user_tsc_khz);
r = 0;
goto out;
}
case KVM_GET_TSC_KHZ: {
r = vcpu->arch.virtual_tsc_khz;
goto out;
}
case KVM_KVMCLOCK_CTRL: {
r = kvm_set_guest_paused(vcpu);
goto out;
}
default:
r = -EINVAL;
}
out:
kfree(u.buffer);
return r;
} | 1286 | True | 1 |
|
CVE-2013-6368 | False | False | False | False | AV:L/AC:H/Au:N/C:C/I:C/A:C | LOCAL | HIGH | NONE | COMPLETE | COMPLETE | COMPLETE | 6.2 | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | nan | [{'url': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'https://github.com/torvalds/linux/commit/fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.openwall.com/lists/oss-security/2013/12/12/12', 'name': '[oss-security] 20131212 Re: [vs-plain] kvm issues', 'refsource': 'MLIST', 'tags': []}, {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1032210', 'refsource': 'CONFIRM', 'tags': []}, {'url': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'name': 'http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fda4e2e85589191b123d31cdc21fd33ee70f50fd', 'refsource': 'CONFIRM', 'tags': ['Exploit', 'Patch']}, {'url': 'http://www.securityfocus.com/bid/64291', 'name': '64291', 'refsource': 'BID', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-updates/2014-02/msg00045.html', 'name': 'openSUSE-SU-2014:0247', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0163.html', 'name': 'RHSA-2014:0163', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html', 'name': 'openSUSE-SU-2014:0204', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2113-1', 'name': 'USN-2113-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2117-1', 'name': 'USN-2117-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00003.html', 'name': 'openSUSE-SU-2014:0205', 'refsource': 'SUSE', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2133-1', 'name': 'USN-2133-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2138-1', 'name': 'USN-2138-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2136-1', 'name': 'USN-2136-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2134-1', 'name': 'USN-2134-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2139-1', 'name': 'USN-2139-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2141-1', 'name': 'USN-2141-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://www.ubuntu.com/usn/USN-2135-1', 'name': 'USN-2135-1', 'refsource': 'UBUNTU', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2014-0284.html', 'name': 'RHSA-2014:0284', 'refsource': 'REDHAT', 'tags': []}, {'url': 'http://rhn.redhat.com/errata/RHSA-2013-1801.html', 'name': 'RHSA-2013:1801', 'refsource': 'REDHAT', 'tags': []}] | [{'description': [{'lang': 'en', 'value': 'CWE-20'}]}] | MEDIUM | [{'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.0:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.2.21:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.30:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.4:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.0.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.1.2:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.10.8:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.11:*:*:*:*:*:*:*', 'cpe_name': []}, 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{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.1:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.10:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.17:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.25:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.4.32:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.5.3:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.6.11:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.7.6:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.8.9:*:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9:rc1:*:*:*:*:*:*', 'cpe_name': []}, {'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:linux:linux_kernel:3.9.1:*:*:*:*:*:*:*', 'cpe_name': []}]}, {'operator': 'OR', 'children': [], 'cpe_match': [{'vulnerable': True, 'cpe23Uri': 'cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*', 'cpe_name': []}]}] | [{'lang': 'en', 'value': 'The KVM subsystem in the Linux kernel through 3.12.5 allows local users to gain privileges or cause a denial of service (system crash) via a VAPIC synchronization operation involving a page-end address.'}] | 2019-04-22T17:48Z | 2013-12-14T18:08Z | Improper Input Validation | The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. |
Input validation is a frequently-used technique
for checking potentially dangerous inputs in order to
ensure that the inputs are safe for processing within the
code, or when communicating with other components. When
software does not validate input properly, an attacker is
able to craft the input in a form that is not expected by
the rest of the application. This will lead to parts of the
system receiving unintended input, which may result in
altered control flow, arbitrary control of a resource, or
arbitrary code execution.
Input validation is not the only technique for
processing input, however. Other techniques attempt to
transform potentially-dangerous input into something safe, such
as filtering (CWE-790) - which attempts to remove dangerous
inputs - or encoding/escaping (CWE-116), which attempts to
ensure that the input is not misinterpreted when it is included
in output to another component. Other techniques exist as well
(see CWE-138 for more examples.)
Input validation can be applied to:
raw data - strings, numbers, parameters, file contents, etc.
metadata - information about the raw data, such as headers or size
Data can be simple or structured. Structured data
can be composed of many nested layers, composed of
combinations of metadata and raw data, with other simple or
structured data.
Many properties of raw data or metadata may need
to be validated upon entry into the code, such
as:
specified quantities such as size, length, frequency, price, rate, number of operations, time, etc.
implied or derived quantities, such as the actual size of a file instead of a specified size
indexes, offsets, or positions into more complex data structures
symbolic keys or other elements into hash tables, associative arrays, etc.
well-formedness, i.e. syntactic correctness - compliance with expected syntax
lexical token correctness - compliance with rules for what is treated as a token
specified or derived type - the actual type of the input (or what the input appears to be)
consistency - between individual data elements, between raw data and metadata, between references, etc.
conformance to domain-specific rules, e.g. business logic
equivalence - ensuring that equivalent inputs are treated the same
authenticity, ownership, or other attestations about the input, e.g. a cryptographic signature to prove the source of the data
Implied or derived properties of data must often
be calculated or inferred by the code itself. Errors in
deriving properties may be considered a contributing factor
to improper input validation.
Note that "input validation" has very different
meanings to different people, or within different
classification schemes. Caution must be used when
referencing this CWE entry or mapping to it. For example,
some weaknesses might involve inadvertently giving control
to an attacker over an input when they should not be able
to provide an input at all, but sometimes this is referred
to as input validation.
Finally, it is important to emphasize that the
distinctions between input validation and output escaping
are often blurred, and developers must be careful to
understand the difference, including how input validation
is not always sufficient to prevent vulnerabilities,
especially when less stringent data types must be
supported, such as free-form text. Consider a SQL injection
scenario in which a person's last name is inserted into a
query. The name "O'Reilly" would likely pass the validation
step since it is a common last name in the English
language. However, this valid name cannot be directly
inserted into the database because it contains the "'"
apostrophe character, which would need to be escaped or
otherwise transformed. In this case, removing the
apostrophe might reduce the risk of SQL injection, but it
would produce incorrect behavior because the wrong name
would be recorded.
| https://cwe.mitre.org/data/definitions/20.html | 0 | Andy Honig | 2013-11-20 10:23:22-08:00 | KVM: x86: Convert vapic synchronization to _cached functions (CVE-2013-6368)
In kvm_lapic_sync_from_vapic and kvm_lapic_sync_to_vapic there is the
potential to corrupt kernel memory if userspace provides an address that
is at the end of a page. This patches concerts those functions to use
kvm_write_guest_cached and kvm_read_guest_cached. It also checks the
vapic_address specified by userspace during ioctl processing and returns
an error to userspace if the address is not a valid GPA.
This is generally not guest triggerable, because the required write is
done by firmware that runs before the guest. Also, it only affects AMD
processors and oldish Intel that do not have the FlexPriority feature
(unless you disable FlexPriority, of course; then newer processors are
also affected).
Fixes: b93463aa59d6 ('KVM: Accelerated apic support')
Reported-by: Andrew Honig <[email protected]>
Cc: [email protected]
Signed-off-by: Andrew Honig <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]> | fda4e2e85589191b123d31cdc21fd33ee70f50fd | False | torvalds/linux | Linux kernel source tree | 2011-09-04 22:48:12 | 2022-08-26 19:08:15 | torvalds | 136917.0 | 44307.0 | vapic_enter | vapic_enter( struct kvm_vcpu * vcpu) | ['vcpu'] | static int vapic_enter(struct kvm_vcpu *vcpu)
{
struct kvm_lapic *apic = vcpu->arch.apic;
struct page *page;
if (!apic || !apic->vapic_addr)
return 0;
page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT);
if (is_error_page(page))
return -EFAULT;
vcpu->arch.apic->vapic_page = page;
return 0;
} | 78 | True | 1 |
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