[gentoo-announce] [ GLSA 201409-08 ] libxml2: Denial of Service

[Kristian Fiskerstrand <k_f@gentoo.org>]

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Gentoo Linux Security Advisory                           GLSA 201409-08
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: libxml2: Denial of Service
     Date: September 19, 2014
     Bugs: #509834
       ID: 201409-08

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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
    -------------------------------------------------------------------
  1  dev-libs/libxml2            < 2.9.1-r4               >= 2.9.1-r4

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
==========

[ 1 ] CVE-2014-0191
      http://nvd.nist.gov/nvd.cfm?cvename=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.

License
=======

Copyright 2014 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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