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Gentoo Linux Security Advisory                           GLSA 200508-01
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                                            https://security.gentoo.org/
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  Severity: High
     Title: Compress::Zlib: Buffer overflow
      Date: August 01, 2005
      Bugs: #100540
        ID: 200508-01

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Synopsis
=======
Compress::Zlib is vulnerable to a buffer overflow which could
potentially lead to execution of arbitrary code.

Background
=========
The Compress::Zlib is a Perl module which provides an interface to the
zlib compression library.

Affected packages
================
    -------------------------------------------------------------------
     Package                 /  Vulnerable  /               Unaffected
    -------------------------------------------------------------------
  1  dev-perl/Compress-Zlib       < 1.35                       >= 1.35

Description
==========
Compress::Zlib 1.34 contains a local vulnerable version of zlib, which
may lead to a buffer overflow.

Impact
=====
By creating a specially crafted compressed data stream, attackers can
overwrite data structures for applications that use Compress::Zlib,
resulting in a Denial of Service and potentially arbitrary code
execution.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All Compress::Zlib users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=dev-perl/Compress-Zlib-1.35"

References
=========
  [ 1 ] GLSA 200507-19
        https://security.gentoo.org/glsa/200507-19
  [ 2 ] GLSA 200507-05
        https://security.gentoo.org/glsa/200507-05
  [ 3 ] CAN-2005-1849
          [ 4 ] CAN-2005-2096
        
Availability
===========
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

  https://security.gentoo.org/glsa/200508-01

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 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.

https://creativecommons.org/licenses/by-sa/2.0/