Candidate: CVE-2009-3623
Description:
 "On setting up the callback to the client, we attempt to use the same
 authentication flavor the client did.  We find an rpc cred to use by
 calling rpcauth_lookup_credcache(), which assumes that the given
 authentication flavor has a credentials cache.  However, this is not
 required to be true--in particular, auth_null does not use one.
 Instead, we should call the auth's lookup_cred() method.
 .
 Without this, a client attempting to mount using nfsv4 and auth_null
 triggers a null dereference."
 .
 The code was introduced in upstream commit 3cef9ab2 (v2.6.31-rc1),
 fixed in 886e3b7f (v2.6.32-rc1), and was later replaced by 80fc015b in
 the same version.
References:
 http://article.gmane.org/gmane.linux.nfs/26513
 https://bugzilla.redhat.com/show_bug.cgi?id=530269
 http://git.kernel.org/linus/3cef9ab266a932899e756f7e1ea7a988a97bf3b2
 http://git.kernel.org/linus/886e3b7fe6054230c89ae078a09565ed183ecc73
 http://git.kernel.org/linus/80fc015bdfe1f5b870c1e1ee02d78e709523fee7
Notes:
Bugs:
upstream: released (2.6.32-rc1), released (2.6.31.2) [b9703d921e254b499b300d652b4f35420176d509]
linux-2.6: released (2.6.31-1)
2.6.18-etch-security: N/A
2.6.24-etch-security: N/A
2.6.26-lenny-security: N/A