|
Yahoo! Messenger IMVironment Cross-Site Scripting Vulnerability
|
|
Secunia Advisory:
|
SA10370
|
|
|
Release Date:
|
2003-12-08
|
|
Popularity:
|
11,991 views
|
|
|
Critical:
|
Moderately critical
|
|
Impact:
|
Cross Site Scripting
|
|
Where:
|
From remote
|
|
Solution Status:
|
Vendor Patch
|
|
| Software: | Yahoo! Messenger 5.x
|
|
|
Subscribe:
|
Instant alerts on relevant vulnerabilities 
|
|
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.
Successful exploitation may e.g. disclose a user's Yahoo ID and encoded password but requires that the IMVironment feature is enabled (default setting).
The vulnerability has been reported in versions 5.5 (Build 1249) and 5.6 (Build 1355). Prior versions may also be affected.
Solution:
Yahoo! has reportedly fixed this in their IMVironment server and in an updated version (5.6 build 1356).
http://messenger.yahoo.com
Provided and/or discovered by:
Chet Simpson
|
|
|
Track this Secunia Advisory
|
Customers of the Secunia Vulnerability Intelligence solutions will automatically receive updates when new information regarding this advisory is released.
Read more about our Vulnerability Intelligence solutions and what they can do for you and your company.
|
|
|
About this Secunia Advisory
|
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
|
