Unspecified vulnerability in the Authentication component for Oracle Database 10.1.0.5 and 10.2.0.3 has unknown impact and attack vectors, aka DB05.  NOTE: as of 20070424, Oracle has not disputed reliable claims that this issue allows remote authenticated users to bypass the AUTH_ALTER_SESSION security policies via a logon trigger ("AFTER LOGON ON DATABASE" trigger directive), a related issue to CVE-2006-0547.