bugtraq - Tlen.pl, remote script execution

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Message-ID: <Pine.GSO.4.44.0412201222550.10057-100000@rose.man.poznan.pl>
Date: Mon, 20 Dec 2004 12:31:32 +0100 (CET)
From: Jaroslaw Sajko <sloik@....poznan.pl>
To: bugtraq@...urityfocus.com, <full-disclosure@...ts.netsys.com>
Subject: Tlen.pl, remote script execution

Product:	Tlen.pl (<= 5.23.4.1)
Vendor:		o2.pl Sp. z o.o. (http://www.tlen.pl/)
Impact:		Remote script execution
Severity:	High
Authors: 	Blazej Miga <bla@....poznan.pl>,
		Jaroslaw Sajko <sloik@....poznan.pl>
Date:		20/12/04

[ISSUE]

Tlen.pl is the instant messenger application used by more than 700 000
users.
There is a vulnerability in message parsing which allows remote execution
of arbitrary script.

[DETAILS]

There is a parsing error. We can send a malicious string which has an url
inside. This url can be a javascript code for example. Code will execute
when the window with the message pops up.

[POF]

Send such a string to any receipent:
www.tlen.pl"style=background-image:url(javascript:alert(%22You%20are%20owned!%22));.pl

[SOLUTION]

Please upgrade to the newest version (5.23.4.2)

 	Copyright Poznan Supercomputing and Networking Center

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