Vulnerability in Bigbluebutton
CVE-2022-41960
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.
Published · last modified .
CVSS v3 metric
CVSS v3 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.
EPSS exploit prediction
EPSS: 0.004 (29.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Bigbluebutton — versions < 2.4.3
Weakness classification (CWE)
References
- github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-rgjp-3r74-g4cm (Third Party Advisory, Release Notes)
- github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.3 (Third Party Advisory, Release Notes)
- github.com/bigbluebutton/bigbluebutton/releases/tag/v2.5-alpha-1 (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2022-41960?
- CVE-2022-41960 is a medium-severity vulnerability in Bigbluebutton, classified under Insufficient Verification of Data Authenticity. CVSS score: 4.3/10. Published 2022-12-16.
- How severe is CVE-2022-41960?
- Medium severity. CVSS v3 base score is 4.3 out of 10.