Gaim is a multi-protocol instant messenger available for a number of operating systems. It supports a variety of instant messaging protocols, including the Yahoo Messenger (YMSG) protocol. There is a buffer overflow vulnerability in the yahoo_login_page_hash() function of Gaim's YMSG protocol. When parsing the Yahoo login webpage, the yahoo_login_page_hash() function fails to perform proper bounds checking on the "value" parameter. Although the source of these values should originate from a site controlled by Yahoo, an attacker may use several techniques (DNS spoofing, man-in-the-middle, etc.) to modify the values returned to the victim.
An attacker with the ability to control the "value" parameter returned to the victim could execute arbitrary code with the privileges of the vulnerable process.
Upgrade to Gaim version 0.76 or later.
This vulnerability was publicly reported by Stefan Esser of e-matters.
This document was written by Damon Morda.
|Date First Published:||2004-05-06|
|Date Last Updated:||2004-05-06 19:46 UTC|