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ICQ 7.5 Cross Site Scripting

ICQ 7.5 Cross Site Scripting
Posted Jul 26, 2011
Authored by noptrix | Site nullsecurity.net

ICQ versions 7.5 and below suffer from a cross site scripting vulnerability.

tags | exploit, xss
SHA-256 | 31d83c74f94445f24399187764dee9ca50087a3f3e58258be59ecbd5143e257d

ICQ 7.5 Cross Site Scripting

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+-----------------------------------------------------------------------------+
| noptrix.net - Public Security Advisory |
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Date:
-----
07/26/2011

Vendor:
-------
ICQ - http://www.icq.com/

Affected Software:
------------------
Software: ICQ
Version: <= 7.5

Affected Platforms:
-------------------
Windows (XP, Vista, 7)

Vulnerability Class:
--------------------
Cross-Site Scripting

Description:
------------
ICQ suffers from a persistent Cross-Site Scripting vulnerability due to a lack
of input validation and output sanitization of the profile entries.

Proof of Concept:
-----------------
The following Javascript payload can be used as profile entries to trigger
the described vulnerability:

--- SNIP ---

"><iframe src=z onload=alert('xss_p0wer_lol') <

--- SNIP ---

For a PoC demonstration see:
- http://www.noptrix.net/tmp/icq_cli_xss.png

Impact:
-------
An attacker could trivially hijack session IDs of remote users and leverage the
vulnerability to increase the attack vector to the underlying software and
operating system of the victim.

Threat Level:
-------------
High

Solution:
---------
icq.com has to validate the input characters and sanitize the output.

Notes:
------
To the whole world: Funny thing: Anglophone and German media refer me as
Armenian in their Skype XSS articles, yet all the Turkish news sites insists
that I am Turkish. For the record, I am Armenian and my people have been
persecuted by Turkey for hundreds of years. Thanks.

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