GLSA 200702-03 Snort: Denial of Service
Posted on: 02/14/2007 01:35 AM

A new security update has been released for Gentoo Linux - Snort: Denial of Service. Here the announcement:

Gentoo Linux Security Advisory GLSA 200702-03
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http://security.gentoo.org/
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Severity: Normal
Title: Snort: Denial of Service
Date: February 13, 2007
Bugs: #161632
ID: 200702-03

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Synopsis
========

Snort contains a vulnerability in the rule matching algorithm that
could result in a Denial of Service.

Background
==========

Snort is a widely deployed intrusion detection program.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-analyzer/snort lt; 2.6.1.2 gt;= 2.6.1.2

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

Randy Smith, Christian Estan and Somesh Jha discovered that the rule
matching algorithm of Snort can be exploited in a way known as a
"backtracking attack" to perform numerous time-consuming operations.

Impact
======

A remote attacker could send specially crafted network packets, which
would result in the cessation of the detections and the consumption of
the CPU resources.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Snort users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-analyzer/snort-2.6.1.2"

References
==========

[ 1 ] CVE-2006-6931
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6931

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

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

http://security.gentoo.org/glsa/glsa-200702-03.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 2007 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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