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General discussion

Yahoo! Messenger IMVironment Cross-Site Scripting Vulnerability

Dec 8, 2003 12:50AM PST

Secunia Advisory: SA10370
Release Date: 2003-12-08


Critical: Moderately critical
Impact: Cross Site Scripting

Where: From remote



Software: Yahoo! Messenger 5.x




Description:
A vulnerability has been reported in Yahoo! Messenger, which can be exploited by malicious people to conduct Cross-Site Scripting attacks.

The vulnerability is caused due to missing input validation when generating an error reply containing the name of an invalid IMVironment.

This can be exploited via a malicious web page to execute arbitrary HTML or script code on a user's system in the context of Yahoo! Messenger by including it in a specially crafted URI using the "ymsgr:" URI handler.

http://www.secunia.com/advisories/10370/

Discussion is locked