Vulnerability · Published Dec 15, 2022 · Assigned by GitHub_M
CVE-2022-41960BigBlueButton contains DoS via failed authToken validation
Medium 4.3
In plain English
A medium-severity insufficient verification of data authenticity in bigbluebutton from bigbluebutton. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities).
Official description
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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| bigbluebutton | bigbluebutton | < 2.4.3 |
Weakness: CWE-345 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L