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TITLE:
ICQ Pro 2003b "MCRegEx__Search" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA21834

VERIFY ADVISORY:
http://secunia.com/advisories/21834/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
ICQ 2003b
http://secunia.com/product/6296/

DESCRIPTION:
Core Security Technologies has reported a vulnerability in ICQ Pro
2003b, which can be exploited by malicious people to compromise a
user's system.

The vulnerability is caused due to a boundary error in the
"MCRegEx__Search()" function in the processing of messages with a
certain type. This can be exploited to cause a heap-based buffer
overflow by specifying an incorrect length value in a message sent to
the client.

Successful exploitation allows execution of arbitrary code.

The vulnerability has been reported in build 3916. Other versions may
also be affected.

SOLUTION:
The vendor recommends upgrading to ICQ 5.1.

PROVIDED AND/OR DISCOVERED BY:
Luciana Tabo, Lucas Lavarello, Sebastian Cufre, Ezequiel Gutesman,
and Javier Garcia Di Palma from Core Security Technologies.

ORIGINAL ADVISORY:
http://www.coresecurity.com/index.php5?module=ContentMod&action=item&id=1509

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