=====================================================================
                                    CERT-Renater

                         Note d'Information No. 2006/VULN319
_____________________________________________________________________

DATE                      : 13/06/2006

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Systems running Vixie Cron versions
                                                       prior to 4.1-r9.

======================================================================

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory                           GLSA 200606-07
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                                             http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

   Severity: High
      Title: Vixie Cron: Privilege Escalation
       Date: June 09, 2006
       Bugs: #134194
         ID: 200606-07

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

Vixie Cron allows local users to execute programs as root.

Background
==========

Vixie Cron is a command scheduler with extended syntax over cron.

Affected packages
=================

     -------------------------------------------------------------------
      Package                 /  Vulnerable  /               Unaffected
     -------------------------------------------------------------------
   1  sys-process/vixie-cron      < 4.1-r9                    >= 4.1-r9

Description
===========

Roman Veretelnikov discovered that Vixie Cron fails to properly check
whether it can drop privileges accordingly if setuid() in do_command.c
fails due to a user exceeding assigned resource limits.

Impact
======

Local users can execute code with root privileges by deliberately
exceeding their assigned resource limits and then starting a command
through Vixie Cron. This requires resource limits to be in place on the
machine.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Vixie Cron users should upgrade to the latest version:

     # emerge --sync
     # emerge --ask --oneshot --verbose ">=sys-process/vixie-cron-4.1-r9"

References
==========

   [ 1 ] CVE-2006-2607
         http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-2607

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

   http://security.gentoo.org/glsa/glsa-200606-07.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security at gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2006 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5

======================================================================

           =========================================================
           Les serveurs de référence du CERT-Renater
           http://www.urec.fr/securite
           http://www.cru.fr/securite
           http://www.renater.fr
           =========================================================
           + CERT-RENATER          | tel : 01-53-94-20-44          +
           + 151 bd de l'Hopital   | fax : 01-53-94-20-41          +
           + 75013 Paris           | email: certsvp@renater.fr     +
           =========================================================