Re: CVE-2011-4324 kernel: nfsv4: mknod(2) DoS

[Solar Designer <solar () openwall com>]

On Thu, Nov 24, 2011 at 09:40:42AM +0800, Eugene Teo wrote:
> This only affects the Linux kernel as shipped with Red Hat Enterprise
> Linux 5. It is possible to trigger the BUG() in fs/nfs/nfs4xdr.c on a
> NFSv4 mount. This patch fixed the problem, although we only backported
> the relevant parts of the patch,
> http://git.kernel.org/linus/dc0b027dfadfcb8a5504f7d8052754bf8d501ab9.
>
> https://bugzilla.redhat.com/CVE-2011-4324

Assuming that the fix for this one is correct and sufficient (and it
appears to be), this is definitely no worse than a DoS. :-)

-                       BUG();
+                       WRITE32(0);

Alexander