GLSA 201409-08: libxml2: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	libxml2: Denial of Service
Date:	09/19/2014
Bugs:	#509834
ID:	201409-08

Synopsis

A vulnerability in libxml2 allows a remote attacker to cause Denial of Service.

Background

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

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
dev-libs/libxml2	< 2.9.1-r4	>= 2.9.1-r4	All supported architectures

Description

A vulnerability in the xmlParserHandlePEReference() function of parser.c, when expanding entity references, can be exploited to consume large amounts of memory and cause a crash or hang.

Impact

A remote attacker may be able to cause Denial of Service via a specially crafted XML file containing malicious attributes.

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/libxml2-2.9.1-r4"

References

CVE-2014-0191

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201409-08.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.