[ GLSA 200411-05 ] libxml2: Remotely exploitable buffer overflow

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200411-05
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                                            http://security.gentoo.org/
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  Severity: High
     Title: libxml2: Remotely exploitable buffer overflow
      Date: November 02, 2004
      Bugs: #69154
        ID: 200411-05

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Synopsis
========

libxml2 contains multiple buffer overflows which could lead to the
execution of arbitrary code.

Background
==========

libxml2 is an XML parsing library written in C.

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

    -------------------------------------------------------------------
     Package           /  Vulnerable  /                     Unaffected
    -------------------------------------------------------------------
  1  dev-libs/libxml2      < 2.6.15                          >= 2.6.15

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

Multiple buffer overflows have been detected in the nanoftp and
nanohttp modules. These modules are responsible for parsing URLs with
ftp information, and resolving names via DNS.

Impact
======

An attacker could exploit an application that uses libxml2 by forcing
it to parse a specially-crafted XML file, potentially causing remote
execution of arbitrary code.

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/libxml2-2.6.15"

References
==========

  [ 1 ] BugTraq Advisory
        http://www.securityfocus.com/archive/1/379383
  [ 2 ] libxml2 ChangeLog
        http://www.xmlsoft.org/ChangeLog.html
  [ 3 ] CAN-2004-0989
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0989

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

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

  http://security.gentoo.org/glsa/glsa-200411-05.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 2004 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/1.0

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