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Gentoo Linux Security Advisory                           GLSA 200404-15
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                                            http://security.gentoo.org/
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  Severity: Low
     Title: XChat 2.0.x SOCKS5 Vulnerability

      Date: April 19, 2004
      Bugs: #46856
        ID: 200404-15

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Synopsis
========

XChat is vulnerable to a stack overflow that may allow a remote
attacker to run arbitrary code.

Background
==========

XChat is a multiplatform IRC client.

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

    -------------------------------------------------------------------
     Package        /   Vulnerable   /                      Unaffected
    -------------------------------------------------------------------
     net-irc/xchat      < 2.0.8-r1                         >= 2.0.8-r1

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

The SOCKS 5 proxy code in XChat is vulnerable to a remote exploit.
Users would have to be using XChat through a SOCKS 5 server, enable
SOCKS 5 traversal which is disabled by default and also connect to an
attacker's custom proxy server.

Impact
======

This vulnerability may allow an attacker to run arbitrary code within
the context of the user ID of the XChat client.

Workaround
==========

A workaround is not currently known for this issue. All users are
advised to upgrade to the latest version of the affected package.

Resolution
==========

All XChat users should upgrade to the latest stable version:

    # emerge sync

    # emerge -pv ">=net-irc/xchat-2.0.8-r1"
    # emerge ">=net-irc/xchat-2.0.8-r1"

Note that users of the gtk1 version of xchat (1.8.*) should upgrade to
xchat-1.8.11-r1:

    # emerge sync

    # emerge -pv "=net-irc/xchat-1.8.11-r1"
    # emerge "=net-irc/xchat-1.8.11-r1"

References
==========

  [ 1 ] http://mail.nl.linux.org/xchat-announce/2004-04/msg00000.html

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

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

     http://security.gentoo.org/glsa/glsa-200404-15.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 2004 Gentoo Technologies, 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/1.0