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Gentoo Linux Security Advisory                           GLSA 200408-26
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                                            https://security.gentoo.org/
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  Severity: Normal
     Title: zlib: Denial of service vulnerability
      Date: August 27, 2004
      Bugs: #61749
        ID: 200408-26

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Synopsis
=======
The zlib library contains a Denial of Service vulnerability.

Background
=========
zlib is a general-purpose data-compression library.

Affected packages
================
    -------------------------------------------------------------------
     Package        /   Vulnerable   /                      Unaffected
    -------------------------------------------------------------------
  1  sys-libs/zlib      <= 1.2.1-r2                        >= 1.2.1-r3

Description
==========
zlib contains a bug in the handling of errors in the "inflate()" and
"inflateBack()" functions.

Impact
=====
An attacker could exploit this vulnerability to launch a Denial of
Service attack on any application using the zlib library.

Workaround
=========
There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version of zlib.

Resolution
=========
All zlib users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=sys-libs/zlib-1.2.1-r3"
    # emerge ">=sys-libs/zlib-1.2.1-r3"

You should also run revdep-rebuild to rebuild any packages that depend
on older versions of zlib :

    # revdep-rebuild

References
=========
  [ 1 ] OpenPKG-SA-2004.038-zlib
        http://meta.openpkg.org/global-sitemap.php

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

  https://security.gentoo.org/glsa/200408-26

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 2004 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/1.0/
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