Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
bigbluebutton bigbluebutton
>= 2.2, < 2.3.18affected>= 2.4-alpha-1, < 2.4-rc-6affected
References
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-p93g-r9gm-9v6r ↗
- https://github.com/bigbluebutton/bigbluebutton/pull/13803 ↗
- https://github.com/bigbluebutton/bigbluebutton/pull/14265 ↗
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18 ↗
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6 ↗