Date: Wed, 30 Jan 2008 23:48:41 +0100
From: Pierre-Yves Rofes <py@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200801-20 ] libxml2: Denial of Service
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Gentoo Linux Security Advisory GLSA 200801-20
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http://security.gentoo.org/
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Severity: Normal
Title: libxml2: Denial of Service
Date: January 30, 2008
Bugs: #202628
ID: 200801-20
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Synopsis
========
A Denial of Service vulnerability has been reported in libxml2.
Background
==========
libxml2 is the XML (eXtended Markup Language) C parser and toolkit
initially developed for the Gnome project.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-libs/libxml2 < 2.6.30-r1 >= 2.6.30-r1
Description
===========
Brad Fitzpatrick reported that the xmlCurrentChar() function does not
properly handle some UTF-8 multibyte encodings.
Impact
======
A remote attacker could entice a user to open a specially crafted XML
document with an application using libxml2, possibly resulting in a
high CPU consumption. Note that this vulnerability could also be
triggered without user interaction by an automated system processing
XML content.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All libxml2 users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/libxml2-2.6.30-r1"
References
==========
[ 1 ] CVE-2007-6284
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6284
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200801-20.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 2008 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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