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KVIrc Failed DCC Handshake Notification Command Injection Vulnerability

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Release Date:  2010-07-28    Last Update:  2010-08-11    Views:  3,690

Secunia Advisory SA40727

Where:

From remote

Impact:

Hijacking

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


A vulnerability has been discovered in KVIrc, which can be exploited by malicious people to hijack IRC connections.

The vulnerability is caused due to the application not properly handling carriage return ("\r") characters when processing CTCP requests. This can be exploited to e.g. inject carriage return characters into KVIrc's failed DCC handshake notification, which can be used to e.g. execute IRC commands in the context of the user's IRC session.

Successful exploitation requires that the "boolNotifyFailedDccHandshakes" option is enabled (default).

The vulnerability is confirmed in version 4.0.0 for Windows. Other versions may also be affected.


Solution:
Update to version 4.0.2.

Provided and/or discovered by:
unic0rn

Original Advisory:
https://svn.kvirc.de/kvirc/ticket/858
http://www.kvirc.net/?id=news&story=2010.08.01.16.30.1.story&dir=latest&lang=en

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: KVIrc Failed DCC Handshake Notification Command Injection Vulnerability

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