CVE-2009-3623

The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4 subsystem in the Linux kernel before 2.6.31.2 attempts to access a credentials cache even when a client specifies the AUTH_NULL authentication flavor, which allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an NFSv4 mount request.

🔗 References (16)

• secalert@redhathttp://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=80fc015bdfe1f5b870c1e1ee02d78e709523fee7
• secalert@redhathttp://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=886e3b7fe6054230c89ae078a09565ed183ecc73
• secalert@redhathttp://marc.info/?l=oss-security&m=125618753029631&w=2
• secalert@redhathttp://marc.info/?l=oss-security&m=125624036516377&w=2
• secalert@redhathttp://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.2
• secalert@redhathttp://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1
• secalert@redhathttp://www.ubuntu.com/usn/usn-864-1
• secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=530269
• af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=80fc015bdfe1f5b870c1e1ee02d78e709523fee7
• af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=886e3b7fe6054230c89ae078a09565ed183ecc73
• af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=oss-security&m=125618753029631&w=2
• af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=oss-security&m=125624036516377&w=2
• af854a3a-2127-422b-91ae-364da2661108http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.2
• af854a3a-2127-422b-91ae-364da2661108http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1
• af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/usn-864-1