Full Disclosure: [ GLSA 200802-02 ] Doomsday: Multiple vulnerabilities

[Pierre-Yves Rofes <py () gentoo org>]

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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
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