Vulnerability Note VU#952875

Yahoo! Messenger is vulnerable to DoS via multiple messages from spoofed names

Original Release date: 05 Jun 2002 | Last revised: 05 Jun 2002


Yahoo! Messenger is an instant messaging client. A report indicates that there is a vulnerability that permits an attacker to spoof the source user name of a Yahoo! Messenger message.


Yahoo! Messenger permits a user to place users on an ignore list. A vulnerability exists that permits users to spoof their source user names on messages. This permits users who have been ignored to continue to send messages to their victim user.


This vulnerability could be used in a mass messaging attack that could lead to the denial of service of a client.


This vulnerability was resolved in version 5,0,0,1058.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
YahooAffected29 May 200205 Jun 2002
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



This vulnerablity was discovered by Scott Woodward <>.

This document was written by Jason Rafail.

Other Information

  • CVE IDs: CAN-2002-0321
  • CERT Advisory: CA-2002-16
  • Date Public: 21 Feb 2002
  • Date First Published: 05 Jun 2002
  • Date Last Updated: 05 Jun 2002
  • Severity Metric: 3.19
  • Document Revision: 14


If you have feedback, comments, or additional information about this vulnerability, please send us email.