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
=================
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Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-analyzer/snort < 2.6.1.2 >= 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 ">=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
