Re: kernel: gfs2 acl issue

[Eugene Teo <eugeneteo () kernel sg>]

On 07/09/2010 11:56 AM, Dan Rosenberg wrote:
> 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.

Thanks Dan. I have informed Greg about 2.6.32.y. FWIW, 2.6.{33,34}.y are 
not affected.

Eugene

> 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); }


--
main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }