Re: CVE Request -- kernel: nfs4_getfacl decoding kernel oops

[Kurt Seifried <kseifried () redhat com>]

On 11/11/2011 09:48 AM, Petr Matousek wrote:
> "nfs4_getfacl decoding causes a kernel Oops when a server returns more
> than 2 GETATTR bitmap words in response to the FATTR4_ACL attribute
> request.
>
> While the NFS client only asks for one attribute (FATTR4_ACL) in the
> first bitmap word, the NFSv4 protocol allows for the server to return
> unbounded bitmaps (more than two)."
>
> Upstream commit:
> e5012d1f3861d18c7f3814e757c1c3ab3741dbcd - incomplete, handles only the
> case when 2 words are expected and 3 are returned
>
> Proposed complete upstream patch:
> http://www.spinics.net/lists/linux-nfs/msg25288.html
>
> Reference:
> https://bugzilla.redhat.com/show_bug.cgi?id=747106
>
> Credit: Andy Adamson
>
> Thanks,
Please use CVE-2011-4132 for this issue.

-- 

-Kurt Seifried / Red Hat Security Response Team