Vulnerability Note VU#137115

Yahoo! Messenger contains a buffer overflow in the URI handler

Original Release date: 05 Jun 2002 | Last revised: 06 Jun 2002


Yahoo! Messenger is an instant messaging client. A remotely exploitable vulnerability has been reported in the URI handler of Yahoo! Messenger.


A remotely exploitable buffer overflow exists in the URI handler of Yahoo! Messenger, versions 5,0,0,1064 and prior, that may permit a remote attacker to execute arbitrary code on the system with the privileges of the current user. A shared buffer for the parameter functions, such as "getimv", "sendim", "message", "addview", "adduser", "call", and "chat", is vulnerable to exploit.

This URI handler is installed by Yahoo! Messenger for applications that use the underlying operating system (such as Microsoft Internet Explorer, Netscape Navigator, Outlook, or the command shell). A URI can be sent by another Yahoo! Messenger user, embedded in a web site, or sent in an HTML-renderable email message.


Exploitation of this vulnerability will crash the application, resulting in a denial-of-service condition. However, this vulnerability is a buffer overflow and may allow the execution of arbitrary code on the local system with the privileges of the current user.


Upgrade to version 5,0,0,1066.

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 vulnerability was discovered by Phuong Nguyen <> of Vice Consulting.

This document was written by Jason Rafail.

Other Information

  • CVE IDs: CAN-2002-0031
  • CERT Advisory: CA-2002-16
  • Date Public: 27 May 2002
  • Date First Published: 05 Jun 2002
  • Date Last Updated: 06 Jun 2002
  • Severity Metric: 18.98
  • Document Revision: 31


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