full-disclosure - [ GLSA 200606-07 ] Vixie Cron: Privilege Escalation

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Message-ID: <200606091731.41621.jaervosz@gentoo.org>
Date: Fri Jun  9 16:32:11 2006
From: jaervosz at gentoo.org (Sune Kloppenborg Jeppesen)
Subject: [ GLSA 200606-07 ] Vixie Cron: Privilege
	Escalation

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Gentoo Linux Security Advisory                           GLSA 200606-07
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                                            http://security.gentoo.org/
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  Severity: High
     Title: Vixie Cron: Privilege Escalation
      Date: June 09, 2006
      Bugs: #134194
        ID: 200606-07

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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@...too.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
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