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Message-Id: <200810290026.57611.wouter@coekaerts.be>
Date: Wed, 29 Oct 2008 00:26:57 +0100
From: Wouter Coekaerts <wouter@...kaerts.be>
To: bugtraq@...urityfocus.com, full-disclosure@...ts.grok.org.uk
Subject: Quassel IRC: connection hijacking

Quassel IRC (http://quassel-irc.org/) is "a modern, cross-platform, 
distributed IRC client".
A vulnerability in the CTCP handling allows an attacker to trick Quassel IRC 
into sending arbitrary commands to the IRC server.
This can be used by an attacker for example to gain operator privileges on a 
channel.

Details
=======
A CTCP ping where the value contains a CTCP quoted newline ('\020' + 'n') will 
let the Quassel core reply with a message containing an unquoted newline 
('\n'). The IRC server interprets this as a command separator.

Solution
========
This has been fixed in version 0.3.0.2, released Oct 27 2008.

Online version: http://wouter.coekaerts.be/site/security/quassel-ctcp

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