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.

Changelog
Further details available in Customer Area

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

Other references
Further details available in Customer Area

Deep Links
Links available in Customer Area