A new security update has been released for Gentoo Linux - Doomsday: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200802-02
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http://security.gentoo.org/
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Severity: High
Title: Doomsday: Multiple vulnerabilities
Date: February 06, 2008
Bugs: #190835
ID: 200802-02

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Synopsis
========

Multiple vulnerabilities in Doomsday might allow remote execution of
arbitrary code or a Denial of Service.

Background
==========

The Doomsday Engine (deng) is a modern gaming engine for popular ID
games like Doom, Heretic and Hexen.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 games-fps/doomsday <= 1.9.0-beta5.2 Vulnerable!
-------------------------------------------------------------------
NOTE: Certain packages are still vulnerable. Users should migrate
to another package if one is available or wait for the
existing packages to be marked stable by their
architecture maintainers.
-------------------------------------------------------------------
-------------------------------------------------------------------
NOTE: Packages marked with asterisks require manual intervention!

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

Luigi Auriemma discovered multiple buffer overflows in the
D_NetPlayerEvent() function, the Msg_Write() function and the
NetSv_ReadCommands() function. He also discovered errors when handling
chat messages that are not NULL-terminated (CVE-2007-4642) or contain a
short data length, triggering an integer underflow (CVE-2007-4643).
Furthermore a format string vulnerability was discovered in the
Cl_GetPackets() function when processing PSV_CONSOLE_TEXT messages
(CVE-2007-4644).

Impact
======

A remote attacker could exploit these vulnerabilities to execute
arbitrary code with the rights of the user running the Doomsday server
or cause a Denial of Service by sending specially crafted messages to
the server.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

While some of these issues could be resolved in
"games-fps/doomsday-1.9.0-beta5.2", the format string vulnerability
(CVE-2007-4644) remains unfixed. We recommend that users unmerge
Doomsday:

# emerge --unmerge games-fps/doomsday

References
==========

[ 1 ] CVE-2007-4642
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4642
[ 2 ] CVE-2007-4643
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4643
[ 3 ] CVE-2007-4644
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4644

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

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

http://security.gentoo.org/glsa/glsa-200802-02.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 2008 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