[ GLSA 200507-28 ] AMD64 x86 emulation base libraries: Buffer overflow

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200507-28
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                                            http://security.gentoo.org/
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  Severity: High
     Title: AMD64 x86 emulation base libraries: Buffer overflow
      Date: July 30, 2005
      Bugs: #100686
        ID: 200507-28

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Synopsis
========

The x86 emulation base libraries for AMD64 contain a vulnerable version
of zlib which could potentially lead to execution of arbitrary code.

Background
==========

The x86 emulation base libraries for AMD64 emulate the x86 (32-bit)
architecture on the AMD64 (64-bit) architecture.

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

    -------------------------------------------------------------------
     Package                  /  Vulnerable  /              Unaffected
    -------------------------------------------------------------------
  1  emul-linux-x86-baselibs        < 2.2                       >= 2.2
    -------------------------------------------------------------------
     # Package 1 only applies to AMD64 users.

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

Earlier versions of emul-linux-x86-baselibs contain a 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 the x86 emulation
base libraries for AMD64, resulting in a Denial of Service and
potentially arbitrary code execution.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All AMD64 x86 emulation base libraries users should upgrade to the
latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose
">=app-emulation/emul-linux-x86-baselibs-2.2"

References
==========

  [ 1 ] GLSA 200507-05
        http://www.gentoo.org/security/en/glsa/glsa-200507-05.xml
  [ 2 ] GLSA 200507-19
        http://www.gentoo.org/security/en/glsa/glsa-200507-19.xml
  [ 3 ] CAN-2005-1849
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1849
  [ 4 ] CAN-2005-2096
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2096

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

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

  http://security.gentoo.org/glsa/glsa-200507-28.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 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.

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

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