CVE-2022-29236
MEDIUM severity · CVSS 4.3 · CWE-285
4.3CVSS MEDIUM
Summary
BigBlueButton is an open source web conferencing system. Starting in version 2.2 and prior to versions 2.3.18 and 2.4-rc-6, an attacker can circumvent access restrictions for drawing on the whiteboard. The permission check is inadvertently skipped on the server, due to a previously introduced grace period. The attacker must be a meeting participant. The problem has been patched in versions 2.3.18 and 2.4-rc-6. There are currently no known workarounds.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactLow
Integrity impactNone
Availability impactNone
Exploit probability (EPSS)1%
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://github.com/bigbluebutton/bigbluebutton/pull/13803 ↗
Additional information
- NVD record
- https://github.com/bigbluebutton/bigbluebutton/pull/13803Patch
- https://github.com/bigbluebutton/bigbluebutton/pull/14265Patch
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-p93g-r9gm-9v6rPatch
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18Advisory
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6Advisory