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  3. Yahoo! Messenger YAuto.DLL Open Buffer Overflow Vulnerability

Yahoo! Messenger YAuto.DLL Open Buffer Overflow Vulnerability

Risk

High

Date Discovered

December 3, 2003

Description

A problem has been identified in the handling of some types of requests by ActiveX controls installed with Yahoo! Messenger, exposing a remotely exploitable buffer overrun. Because of this, it may be possible for an attacker to execute arbitrary code on a vulnerable host.

Technologies Affected

  • Yahoo! Messenger 5.6.0
  • Yahoo! Messenger 5.6.0 .0.1347

Recommendations

Run all software as a nonprivileged user with minimal access rights.

Non-administrative tasks such as browsing the web should always be performed as an unprivileged user with minimal access rights. This will reduce the consequences of successful exploitation of this and other vulnerabilities.

Do not follow links provided by unknown or untrusted sources.

Unless required, do not visit URIs provided by sources of questionable integrity. If required, use additional security precautions through software configuration and privilege management.

Set web browser security to disable the execution of script code or active content.

Modify the default browser security policy to disable potentially dangerous features and eliminate a common vector of client-side attacks.
The vendor has released an update to address this issue:

Credits

Discovery credited to Tri Huynh.
Copyright © Symantec Corporation.
Permission to redistribute this alert electronically is granted as long as it is not edited in any way unless authorized by Symantec Security Response. Reprinting the whole or part of this alert in any medium other than electronically requires permission from secure@symantec.com.

Disclaimer
The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.
Symantec, Symantec products, Symantec Security Response, and secure@symantec.com are registered trademarks of Symantec Corp. and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.

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