[ GLSA 200903-26 ] TMSNC: Execution of arbitrary code

[Robert Buchholz <rbu () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200903-26
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: TMSNC: Execution of arbitrary code
      Date: March 12, 2009
      Bugs: #229157
        ID: 200903-26

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Synopsis
========

A buffer overflow in TMSNC might lead to the execution of arbitrary
code when processing an instant message.

Background
==========

TMSNC is a Textbased client for the MSN instant messaging protocol.

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

    -------------------------------------------------------------------
     Package       /   Vulnerable   /                       Unaffected
    -------------------------------------------------------------------
  1  net-im/tmsnc      <= 0.3.2-r1                         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.

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

Nico Golde reported a stack-based buffer overflow when processing a MSN
packet with a UBX command containing a large UBX payload length field.

Impact
======

A remote attacker could send a specially crafted message, possibly
resulting in the execution of arbitrary code.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

Since TMSNC is no longer maintained, we recommend that users unmerge
the vulnerable package and switch to another console-based MSN client
such as CenterIM or Pebrot:

    # emerge --unmerge "net-im/tmsnc"

References
==========

  [ 1 ] CVE-2008-2828
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2828

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

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

  http://security.gentoo.org/glsa/glsa-200903-26.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 2009 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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