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Gentoo: libextractor Multiple overflow vulnerabilities Print E-mail
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Posted by Benjamin D. Thomas   
Gentoo libextractor is affected by several overflow vulnerabilities in the PDF, Real and PNG extractors, making it vulnerable to execution of arbitrary code.
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Gentoo Linux Security Advisory                           GLSA 200506-06
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: libextractor: Multiple overflow vulnerabilities
      Date: June 09, 2005
      Bugs: #79704
        ID: 200506-06

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Synopsis
========

libextractor is affected by several overflow vulnerabilities in the
PDF, Real and PNG extractors, making it vulnerable to execution of
arbitrary code.

Background
==========

libextractor is a library used to extract meta-data from files. It
makes use of Xpdf code to extract information from PDF files.

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

    -------------------------------------------------------------------
     Package                  /  Vulnerable  /              Unaffected
    -------------------------------------------------------------------
  1  media-libs/libextractor       < 0.5.0                    >= 0.5.0

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

Xpdf is vulnerable to multiple overflows, as described in GLSA
200501-28. Also, integer overflows were discovered in Real and PNG
extractors.

Impact
======

An attacker could design malicious PDF, PNG or Real files which, when
processed by an application making use of libextractor, would result in
the execution of arbitrary code with the rights of the user running the
application.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libextractor users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=media-libs/libextractor-0.5.0"

References
==========

  [ 1 ] CAN-2005-0064
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0064
  [ 2 ] GLSA 200501-28
        http://www.gentoo.org/security/en/glsa/glsa-200501-28.xml
  [ 3 ] libextractor security announcement
        http://gnunet.org/libextractor/

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

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

  http://security.gentoo.org/glsa/glsa-200506-06.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 2005 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/2.0
 
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