[gentoo-announce] [ GLSA 201203-04 ] libxml2: Denial of Service

[news 28]

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Gentoo Linux Security Advisory GLSA 201203-04

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http://security.gentoo.org/

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Severity: Normal

Title: libxml2: Denial of Service

Date: March 06, 2012

Bugs: #405261

ID: 201203-04

 

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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

-------------------------------------------------------------------

1 dev-libs/libxml2 < 2.7.8-r5 >= 2.7.8-r5

 

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

==========

 

[ 1 ] CVE-2012-0841

http://nvd.nist.gov/nvd.cfm?cvename=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 ( -at -) gentoo.org or alternatively, you may file a bug at

https://bugs.gentoo.org.

 

License

=======

 

Copyright 2012 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