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.
Metrics
CVSS Version: 3.1 |
Base Score: 4.3 MEDIUM Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L