Vulnerability Note VU#839280

Gaim vulnerable to malformed SNAC packet infinite processing loop

Overview

Gaim contains a flaw in the processing of certain packets that may cause a denial of service.

I. Description

From the Gaim project:

Gaim is a multi-protocol instant messaging (IM) client for Linux, BSD, MacOS X, and Windows. It is compatible with AIM and ICQ (Oscar protocol), MSN Messenger, Yahoo!, IRC, Jabber, Gadu-Gadu, SILC, GroupWise Messenger, and Zephyr networks

Gaim is susceptible to receiving a malformed AIM/ICQ OSCAR SNAC packet that may cause Gaim to enter an infinite processing loop. Please note that creating this type of malformed SNAC packet requires a custom client capable of crafting malicious invalid packets.

II. Impact

A remote attacker may be able to cause Gaim and the local system to become unresponsive or to cause Gaim to crash.

III. Solution

Apply an update

This flaw has been fixed in Gaim 1.1.3, along with other potential security vulnerabilities. All users may download an update at the Gaim Downloads page.
As a best practice and potential workaround, users should not accept unexpected messages from unknown sources.

Systems Affected

Vendor	Status	Date Notified	Date Updated
Gaim	Vulnerable	21-Feb-2005

References

http://secunia.com/advisories/14322/
http://gaim.sourceforge.net/security/index.php?id=10

Credit

Thanks to the Gaim project for reporting this vulnerability.

This document was written by Ken MacInnis based primarily on information from the Gaim project.

Other Information

Date Public:	2005-02-17
Date First Published:	2005-02-21
Date Last Updated:	2005-02-22
CERT Advisory:
CVE-ID(s):	CAN-2005-0472
NVD-ID(s):	CAN-2005-0472
US-CERT Technical Alerts:
Metric:	1.28
Document Revision:	10

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