[ GLSA 200410-13 ] BNC: Input validation flaw

[Thierry Carrez <koon () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200410-13
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: BNC: Input validation flaw
      Date: October 15, 2004
      Bugs: #66912
        ID: 200410-13

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Synopsis
========

BNC contains an input validation flaw which might allow a remote
attacker to issue arbitrary IRC related commands.

Background
==========

BNC is an IRC proxying server

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

    -------------------------------------------------------------------
     Package      /  Vulnerable  /                          Unaffected
    -------------------------------------------------------------------
  1  net-irc/bnc       < 2.8.9                                >= 2.8.9

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

A flaw exists in the input parsing of BNC where part of the
sbuf_getmsg() function handles the backspace character incorrectly.

Impact
======

A remote user could issue commands using fake authentication
credentials and possibly gain access to scripts running on the client
side.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All BNC users should upgrade to the latest version:

    # emerge sync

    # emerge -pv ">=net-irc/bnc-2.8.9"
    # emerge ">=net-irc/bnc-2.8.9"

References
==========

  [ 1 ] BNC Changes
        http://www.gotbnc.com/changes.html#2.8.9

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

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

  http://security.gentoo.org/glsa/glsa-200410-13.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/1.0

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