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quassel-commands.txt

quassel-commands.txt
Posted Oct 30, 2008
Authored by Wouter Coekaerts

A vulnerability in the CTCP handling allows an attacker to trick Quassel IRC into sending arbitrary commands to the IRC server. Versions before 0.3.0.2 are affected.

tags | advisory, arbitrary
SHA-256 | 9b09430bab211f1afa35ab4d949fc42f6cf12feeb69eb382a6f8cd73a189cb41

quassel-commands.txt

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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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