full-disclosure - [ GLSA 200804-02 ] bzip2: Denial of Service

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Date: Wed, 02 Apr 2008 23:16:56 +0200
From: Pierre-Yves Rofes <py@...too.org>
To: gentoo-announce@...too.org
Cc: full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
	security-alerts@...uxsecurity.com
Subject: [ GLSA 200804-02 ] bzip2: Denial of Service

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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@...too.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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