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             AUSCERT External Security Bulletin Redistribution

                               ESB-2009.1208
               Perl Compress::Raw modules: Denial of Service
                              20 August 2009

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Perl Compress::Raw
Publisher:         Gentoo
Operating System:  UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2009-1884 CVE-2009-1391 

Reference:         ESB-2009.1017

Original Bulletin: 
   http://security.gentoo.org/glsa/glsa-200908-07.xml

Comment: ESB-2009.1017 contained details related to this advisory covering 
         only Compress::Raw::Zlib. This advisory also contains details for 
         Compress::Raw::Bzip2.
         
         This advisory references vulnerabilities in products which run on 
         platforms other than Gentoo. It is recommended that administrators 
         running Perl Compress::Raw check for an updated version of the 
         software for their operating system.

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Gentoo Linux Security Advisory                           GLSA 200908-07
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Perl Compress::Raw modules: Denial of Service
      Date: August 18, 2009
      Bugs: #273141, #281955
        ID: 200908-07

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Synopsis
========

An off-by-one error in Compress::Raw::Zlib and Compress::Raw::Bzip2
might lead to a Denial of Service.

Background
==========

Compress::Raw::Zlib and Compress::Raw::Bzip2 are Perl low-level
interfaces to the zlib and bzip2 compression libraries.

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

    -------------------------------------------------------------------
     Package                       /  Vulnerable  /         Unaffected
    -------------------------------------------------------------------
  1  perl-core/Compress-Raw-Zlib        < 2.020               >= 2.020
  2  perl-core/Compress-Raw-Bzip2       < 2.020               >= 2.020
    -------------------------------------------------------------------
     2 affected packages on all of their supported architectures.
    -------------------------------------------------------------------

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

Leo Bergolth reported an off-by-one error in the inflate() function in
Zlib.xs of Compress::Raw::Zlib, possibly leading to a heap-based buffer
overflow (CVE-2009-1391).

Paul Marquess discovered a similar vulnerability in the bzinflate()
function in Bzip2.xs of Compress::Raw::Bzip2 (CVE-2009-1884).

Impact
======

A remote attacker might entice a user or automated system (for instance
running SpamAssassin or AMaViS) to process specially crafted files,
possibly resulting in a Denial of Service condition.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Compress::Raw::Zlib users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose
    =perl-core/Compress-Raw-Zlib-2.020

All Compress::Raw::Bzip2 users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose
    =perl-core/Compress-Raw-Bzip2-2.020

References
==========

  [ 1 ] CVE-2009-1391
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1391
  [ 2 ] CVE-2009-1884
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1884

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

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

  http://security.gentoo.org/glsa/glsa-200908-07.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
https://bugs.gentoo.org.

License
=======

Copyright 2009 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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