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Date: Tue, 10 Jul 2012 16:30:40 +0200
From: Marcus Meissner <meissner@...e.de>
To: oss-security@...ts.openwall.com
Cc: Kurt Seifried <kseifried@...hat.com>
Subject: Re: ecryptfs headsup

On Tue, Jul 10, 2012 at 04:21:13PM +0200, Sebastian Krahmer wrote:
> 
> It is a potential privilege escalation since the pam module
> was not setting uid/gid(list) appropriately and the suid
> binary did not clear environment before exec'ing umount.
> I do not know whether MS_NOSUID was really needed (and maybe
> MS_NODEV is, but I was not able to create dev files).
> Unfortunally we found ecryptfs not really stable inside the kernel
> and Marcus is still rebooting :)

This means ...

So far we have not yet found a specific security issue.

Ciao, Marcus
 
> Sebastian
> 
> On Tue, Jul 10, 2012 at 08:07:28AM -0600, Kurt Seifried wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> > 
> > On 07/10/2012 05:33 AM, Sebastian Krahmer wrote:
> > > Hi,
> > > 
> > > We made a hardening patch for ecryptfs utils. It is finally ready, 
> > > using sysconf(_SC_NGROUPS_MAX) :)
> > > 
> > > I dont know whether a CVE is needed, maybe if you already ship it
> > > suid root (we do not).
> > > 
> > > It can be found here:
> > > 
> > > https://bugzilla.novell.com/show_bug.cgi?id=740110
> > > 
> > > Sebastian
> > 
> > Well what is the security vulnerability / trust boundary that can be
> > broken using this issue?
> > 
> > - -- 
> > Kurt Seifried Red Hat Security Response Team (SRT)
> > PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993
> > 
> > 
> > 
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v1.4.12 (GNU/Linux)
> > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
> > 
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> > =7ydb
> > -----END PGP SIGNATURE-----
> 
> -- 
> 
> ~ perl self.pl
> ~ $_='print"\$_=\47$_\47;eval"';eval
> ~ krahmer@...e.de - SuSE Security Team
> 
> ---
> SUSE LINUX Products GmbH,
> GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 16746 (AG Nürnberg)
> Maxfeldstraße 5
> 90409 Nürnberg
> Germany
> 

-- 
Working, but not speaking, for the following german company:
SUSE LINUX Products GmbH, HRB 16746 (AG Nuernberg)
Geschaeftsfuehrer: Jeff Hawn, Jennifer Guild, Felix Imendoerffer

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