GLSA 200907-10 Syslog-ng: Chroot escape

Posted by Bob on: 07/12/2009 07:30 PM [ Print | 0 comment(s) ]

A new security update has been released for Gentoo Linux - Syslog-ng: Chroot escape. Here the announcement:

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 lt; 2.1.3 *gt;= 2.0.10
gt;= 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 "gt;=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 "gt;=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