[ GLSA 200804-02 ] bzip2: Denial of Service

[Pierre-Yves Rofes <py () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200804-02
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: bzip2: Denial of Service
      Date: April 02, 2008
      Bugs: #213820
        ID: 200804-02

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Synopsis
========

A buffer overread vulnerability has been discovered in Bzip2.

Background
==========

bzip2 is a free and open source lossless data compression program.

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

    -------------------------------------------------------------------
     Package         /  Vulnerable  /                       Unaffected
    -------------------------------------------------------------------
  1  app-arch/bzip2       < 1.0.5                             >= 1.0.5

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

The Oulu University discovered that bzip2 does not properly check
offsets provided by the bzip2 file, leading to a buffer overread.

Impact
======

Remote attackers can entice a user or automated system to open a
specially crafted file that triggers a buffer overread, causing a
Denial of Service. libbz2 and programs linking against it are also
affected.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All bzip2 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=app-arch/bzip2-1.0.5"

References
==========

  [ 1 ] CVE-2008-1372
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1372

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

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

  http://security.gentoo.org/glsa/glsa-200804-02.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
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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