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Gentoo Linux Security Advisory                           GLSA 200603-11
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Freeciv: Denial of Service
      Date: March 16, 2006
      Bugs: #125304
        ID: 200603-11

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Synopsis
========

A memory allocation bug in Freeciv allows a remote attacker to perform
a Denial of Service attack.

Background
==========

Freeciv is an open source turn-based multiplayer strategy game, similar
to the famous Civilization series.

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

    -------------------------------------------------------------------
     Package                 /  Vulnerable  /               Unaffected
    -------------------------------------------------------------------
  1  games-strategy/freeciv       < 2.0.8                     >= 2.0.8

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

Luigi Auriemma discovered that Freeciv could be tricked into the
allocation of enormous chunks of memory when trying to uncompress
malformed data packages, possibly leading to an out of memory condition
which causes Freeciv to crash or freeze.

Impact
======

A remote attacker could exploit this issue to cause a Denial of Service
by sending specially crafted data packages to the Freeciv game server.

Workaround
==========

Play solo games or restrict your multiplayer games to trusted parties.

Resolution
==========

All Freeciv users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=games-strategy/freeciv-2.0.8"

References
==========

  [ 1 ] CVE-2006-0047
        http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0047
  [ 2 ] Original advisory
        http://aluigi.altervista.org/adv/freecivdos-adv.txt

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

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

  http://security.gentoo.org/glsa/glsa-200603-11.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 2006 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