Re: kernel: gfs2 acl issue

[Dan Rosenberg <dan.j.rosenberg () gmail com>]

To elaborate on the issue: the gfs2 filesystem in 2.6.32 kernels
currently allows any user to set arbitrary ACLs for files they do not
own, essentially granting full access to everything.  The source of
this problem also caused other misbehavior of ACLs.  This fix resolved
the issue for 2.6.33, but it was not backported, so 2.6.32 remains
vulnerable.

-Dan

On Thu, Jul 8, 2010 at 11:47 PM, Eugene Teo <eugeneteo () kernel sg> wrote:
> Upstream commit 2646a1f6 (2.6.33-rc1) fixed an interesting gfs2 acl issue
> late last year. Thanks Dan Rosenberg for informing us about this.
>
> http://git.kernel.org/linus/2646a1f61a3b5525914757f10fa12b5b94713648
>
> I didn't request a CVE name for this but if you need one, ping Steve.
>
> Thanks, Eugene
> --
> main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }