RedhatCVELIST:CVE-2009-3623CVE-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
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=80fc015bdfe1f5b870c1e1ee02d78e709523fee7
git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=886e3b7fe6054230c89ae078a09565ed183ecc73
marc.info/?l=oss-security&m=125618753029631&w=2
marc.info/?l=oss-security&m=125624036516377&w=2
www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.2
www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1
www.ubuntu.com/usn/usn-864-1
bugzilla.redhat.com/show_bug.cgi?id=530269
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