[ GLSA 200907-10 ] Syslog-ng: Chroot escape

[Robert Buchholz <rbu () gentoo org>]

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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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