CVE-2009-3624

The get_instantiation_keyring function in security/keys/keyctl.c in the KEYS subsystem in the Linux kernel before 2.6.32-rc5 does not properly maintain the reference count of a keyring, which allows local users to gain privileges or cause a denial of service (OOPS) via vectors involving calls to this function without specifying a keyring by ID, as demonstrated by a series of keyctl request2 and keyctl list commands.

🔗 References (18)

• secalert@redhathttp://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=21279cfa107af07ef985539ac0de2152b9cba5f5
• secalert@redhathttp://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html
• secalert@redhathttp://marc.info/?l=oss-security&m=125619420905341&w=2
• secalert@redhathttp://marc.info/?l=oss-security&m=125624091417161&w=2
• secalert@redhathttp://secunia.com/advisories/37086
• secalert@redhathttp://secunia.com/advisories/38017
• secalert@redhathttp://twitter.com/spendergrsec/statuses/4916661870
• secalert@redhathttp://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc5
• secalert@redhathttp://www.ubuntu.com/usn/usn-864-1
• af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=21279cfa107af07ef985539ac0de2152b9cba5f5
• af854a3a-2127-422b-91ae-364da2661108http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html
• af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=oss-security&m=125619420905341&w=2
• af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=oss-security&m=125624091417161&w=2
• af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/37086
• af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/38017