Check Point Advisories

Gaim AIM-ICQ Protocol Handling Buffer Overflow (CVE-2005-2103)

Vulnerability
Protection

Check Point Reference:	CPAI-2005-294
Date Published:	15 Oct 2009
Severity:	High
Last Updated:	Thursday 15 October, 2009
Source:
Industry Reference:	CVE-2005-2103
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	Gaim is a multi-protocol, multi-platform instant messaging client. The product supports numerous protocols such as AIM and ICQ, MSN, Yahoo!, and IRC. Gaim allows one user to log into multiple accounts on multiple IM networks simultaneously. The AIM/ICQ protocol is a TCP based instant message protocol. The client and the server communicate through the port 5190/TCP. A heap buffer overflow vulnerability exists in the Gaim instant messaging client. The vulnerability is created by the improper handling of Away messages in the AIM and ICQ protocols. The exploitation of this vulnerability may allow malicious users to inject and execute arbitrary code on a target host with the privileges of the current logged in user. In a simple attack case aimed at creating a denial of service condition, the affected product will terminate. In a more sophisticated attack scenario, where the malicious user is successful in injecting and executing supplied code, the behaviour of the system is dependent on the nature the injected code. Any code injected into the vulnerable component would execute in the security context of logged in user.

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 Gaim AIM-ICQ Protocol Handling 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: Gaim AIM-ICQ protocol handling buffer overflow