CVE-2022-41960: BigBlueButton contains DoS via failed authToken validation
BigBlueButton is an open source web conferencing system. Versions prior to 2.4.3, are subject to Insufficient Verification of Data Authenticity, resulting in Denial of Service. An attacker can make a Meteor call to validateAuthToken using a victim's userId, meetingId, and an invalid authToken. This forces the victim to leave the conference, because the resulting verification failure is also observed and handled by the victim's client. The attacker must be a participant in any meeting on the server. This issue is patched in version 2.4.3. There are no workarounds.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2022-41960?
CVE-2022-41960 is a vulnerability in the BigBlueButton web conferencing system that allows for Denial of Service attacks.
What is the severity of CVE-2022-41960?
The severity of CVE-2022-41960 is medium, with a CVSS score of 4.3.
Which version of BigBlueButton is affected by CVE-2022-41960?
Versions prior to 2.4.3 of BigBlueButton are affected by CVE-2022-41960.
How can an attacker exploit CVE-2022-41960?
An attacker can exploit CVE-2022-41960 by making a Meteor call to validateAuthToken using a victim's userId, meetingId, and an invalid authToken.
Is there a fix for CVE-2022-41960?
Yes, the fix for CVE-2022-41960 is to update to version 2.4.3 or later of BigBlueButton.