Multiple unspecified vulnerabilities in the Internet Key Exchange version 1 (IKEv1) implementation in HP HP-UX B.11.00, B.11.11, and B.11.23 running IPSec, HP Jetdirect 635n IPv6/IPsec Print Server, and HP Tru64 UNIX 5.1B-3 and 5.1B-2/PK4, allow remote attackers to cause a denial of service via certain IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.  NOTE: due to the lack of details in the HP advisory, it is unclear which of CVE-2005-3666, CVE-2005-3667, and/or CVE-2005-3668 this issue applies to.