GLSA 201203-04: libxml2: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	libxml2: Denial of Service
Date:	03/06/2012
Bugs:	#405261
ID:	201203-04

Synopsis

A hash collision vulnerability in libxml2 allows remote attackers to cause a Denial of Service condition.

Background

libxml2 is the XML C parser and toolkit developed for the Gnome project.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/libxml2	< 2.7.8-r5	>= 2.7.8-r5	All supported architectures

Description

libxml2 does not properly randomize hash functions to protect against hash collision attacks.

Impact

A remote attacker could entice a user or automated system to open a specially crafted XML document with an application using libxml2 resulting in a Denial of Service condition.

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/libxml2-2.7.8-r5"

References

CVE-2012-0841

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201203-04.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 https://bugs.gentoo.org.