GLSA 200410-13: BNC: Input validation flaw
Posted on: 10/15/2004 02:18 PM

A BNC security update has been released for Gentoo Linux

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200410-13
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: Normal
Title: BNC: Input validation flaw
Date: October 15, 2004
Bugs: #66912
ID: 200410-13

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

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


Printed from Linux Compatible (http://www.linuxcompatible.org/news/story/glsa_200410_13_bnc_input_validation_flaw.html)