Check Point Advisories

Cerulean Studios Trillian AIM XML Tag Handling Heap Buffer Overflow (CVE-2008-5403)

Vulnerability
Protection

Check Point Reference:	CPAI-2008-387
Date Published:	13 Oct 2009
Severity:	High
Last Updated:	Tuesday 13 October, 2009
Source:
Industry Reference:	CVE-2008-5403
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Cerulean Studios' Trillian is an instant messaging (IM) client application that can interact with various IM protocols such as MSN, AIM, ICQ, YAHOO, etc. Specifically, AIM clients uses Open System for Communication in Realtime (OSCAR) protocol to talk to the backend servers. In Trillian, communication over OSCAR is mainly handled by plugin aim.dll. There exists a buffer overflow vulnerability in Trillian instant messenger client application. The vulnerability is due to a boundary error when parsing malformed XML tags in AIM messages. This could be exploited by remote attackers by sending malicious message to the target user. Successful exploitation can lead to arbitrary code execution within the security context of the currently logged on user. An attack targeting this vulnerability can result in the injection and execution of code. If code execution is successful, the behaviour of the target will depend on the intention of the attacker. Any code injected will be executed within the security context of the currently logged in user. In a case where code execution is unsuccessful, affected product will terminate abnormally.

Protection Overview

This protection will detect and block attempts to exploit this vulnerability

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R80 / R77 / R75

In the IPS tab, click Protections and find the Cerulean Studios Trillian AIM XML Tag Handling Heap Buffer Overflow protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Instant Messenger.
Attack Information: Cerulean Studios Trillian AIM XML tag handling heap buffer overflow