oss-security - Re: kernel: gfs2 acl issue

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Message-ID: <1066087622.2481801278676648947.JavaMail.root@zmail01.collab.prod.int.phx2.redhat.com>
Date: Fri, 9 Jul 2010 07:57:28 -0400 (EDT)
From: Josh Bressers <bressers@...hat.com>
To: oss-security@...ts.openwall.com
Cc: coley <coley@...re.org>
Subject: Re: kernel: gfs2 acl issue

This clearly needs a CVE id.

Use CVE-2010-2525

Thanks.

-- 
    JB


----- "Dan Rosenberg" <dan.j.rosenberg@...il.com> 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.
> 
> -Dan
> 
> On Thu, Jul 8, 2010 at 11:47 PM, Eugene Teo <eugeneteo@...nel.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); }
> >

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