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Gentoo Linux Security Advisory                           GLSA 201207-02
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                                            http://security.gentoo.org/
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 Severity: Normal
    Title: libxml2: User-assisted execution of arbitrary code
     Date: July 09, 2012
     Bugs: #416209
       ID: 201207-02

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Synopsis
========

A off-by-one error in libxml2 could result in execution of arbitrary
code or 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           < 2.8.0_rc1              >= 2.8.0_rc1

Description
===========

The "xmlXPtrEvalXPtrPart()" function in xpointer.c contains an
off-by-one error.

Impact
======

A remote attacker could entice a user or automated system to open a
specially crafted XML document with an application using libxml2,
possibly resulting in execution of arbitrary code or 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/libxml2-2.8.0_rc1"

References
==========

[ 1 ] CVE-2011-3102
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3102

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 http://security.gentoo.org/glsa/glsa-201207-02.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 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