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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1076
                         Syslog-ng: Chroot escape
                               20 July 2009

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

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Syslog-ng
Publisher:         Gentoo
Operating System:  UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Reduced Security -- Existing Account
Resolution:        Upgrade
CVE Names:         CVE-2008-5110  

Original Bulletin: 
   http://security.gentoo.org/glsa/glsa-200907-10.xml

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Gentoo. It is recommended that administrators 
         running Syslog-ng check for an updated version of the software for 
         their operating system.

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Gentoo Linux Security Advisory                           GLSA 200907-10
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: Syslog-ng: Chroot escape
      Date: July 12, 2009
      Bugs: #247278
        ID: 200907-10

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Synopsis
========

Syslog-ng does not properly initialize its chroot jail allowing for an
escape if a separate vulnerability in Syslog-ng is exploited.

Background
==========

Syslog-ng is a flexible and scalable system logger.

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

    -------------------------------------------------------------------
     Package              /  Vulnerable  /                  Unaffected
    -------------------------------------------------------------------
  1  app-admin/syslog-ng       < 2.1.3                      *>= 2.0.10
                                                              >= 2.1.3

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

Florian Grandel reported that Syslog-ng does not call chdir() before
chroot() which leads to an inherited file descriptor to the current
working directory.

Impact
======

A local attacker might exploit a separate vulnerability in Syslog-ng
and use this vulnerability to escape the chroot jail.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Syslog-ng 2.0 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-admin/syslog-ng-2.0.10"

All Syslog-ng 2.1 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-admin/syslog-ng-2.1.3"

References
==========

  [ 1 ] CVE-2008-5110
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5110

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

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

  http://security.gentoo.org/glsa/glsa-200907-10.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@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2009 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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