Yahoo! Messenger Invisible User Detection Weakness

BID:6121

Info

Yahoo! Messenger Invisible User Detection Weakness

Bugtraq ID: 6121
Class: Design Error
CVE:
Remote: Yes
Local: No
Published: Nov 07 2002 12:00AM
Updated: Nov 07 2002 12:00AM
Credit: Discovery credited to cringe <[email protected]>.
Vulnerable: Yahoo! Messenger 5.0 .1232
Yahoo! Messenger 5.0 .1046
Not Vulnerable:

Discussion

Yahoo! Messenger Invisible User Detection Weakness

Yahoo! Messenger allows users to set their status to 'Invisible' so that other users are not informed that the user is online. A Yahoo! Instant Messenger user can determine if another user is online by requesting access to the user's shared files.

The message returned by this request will contain information that reveals the user's true online status. Note, however, that the 'Invisible' user will receive a message asking whether to allow the requestor permission to access the file shares.

Exploit / POC

Yahoo! Messenger Invisible User Detection Weakness

There is no exploit code necessary.

References

Yahoo! Messenger Invisible User Detection Weakness

References:

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report