[ GLSA 200411-24 ] BNC: Buffer overflow vulnerability

[Sune Kloppenborg Jeppesen <jaervosz () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200411-24
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                                            http://security.gentoo.org/
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  Severity: High
     Title: BNC: Buffer overflow vulnerability
      Date: November 16, 2004
      Bugs: #70674
        ID: 200411-24

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Synopsis
========

BNC contains a buffer overflow vulnerability that may lead to Denial of
Service and execution of arbitrary code.

Background
==========

BNC (BouNCe) is an IRC proxy server.

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

    -------------------------------------------------------------------
     Package      /  Vulnerable  /                          Unaffected
    -------------------------------------------------------------------
  1  net-irc/bnc       < 2.9.1                                >= 2.9.1

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

Leon Juranic discovered that BNC fails to do proper bounds checking
when checking server response.

Impact
======

An attacker could exploit this to cause a Denial of Service and
potentially execute arbitary code with the permissions of the user
running BNC.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All BNC users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-irc/bnc-2.9.1"

References
==========

  [ 1 ] BNC ChangeLog
        http://gotbnc.com/changes.html
  [ 2 ] LSS-2004-11-03
        http://security.lss.hr/en/index.php?page=details&ID=LSS-2004-11-03

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

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

  http://security.gentoo.org/glsa/glsa-200411-24.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 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

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