Full Disclosure: [ GLSA 200808-06 ] libxslt: Execution of arbitrary code

[Tobias Heinlein <keytoaster () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200808-06
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: libxslt: Execution of arbitrary code
      Date: August 06, 2008
      Bugs: #232172
        ID: 200808-06

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Synopsis
========

libxslt is affected by a heap-based buffer overflow, possibly leading
to the execution of arbitrary code.

Background
==========

libxslt is the XSLT C library developed for the GNOME project. XSLT is
an XML language to define transformations for XML.

Affected packages
=================

    -------------------------------------------------------------------
     Package           /   Vulnerable   /                   Unaffected
    -------------------------------------------------------------------
  1  dev-libs/libxslt      < 1.1.24-r1                    >= 1.1.24-r1
                                                               < 1.1.8

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

Chris Evans (Google Security) reported that the libexslt library that
is part of libxslt is affected by a heap-based buffer overflow in the
RC4 encryption/decryption functions.

Impact
======

A remote attacker could entice a user to process an XML file using a
specially crafted XSLT stylesheet in an application linked against
libxslt, possibly leading to the execution of arbitrary code with the
privileges of the user running the application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libxslt users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-libs/libxslt-1.1.24-r1"

References
==========

  [ 1 ] CVE-2008-2935
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2935

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

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

  http://security.gentoo.org/glsa/glsa-200808-06.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
http://bugs.gentoo.org.

License
=======

Copyright 2008 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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