CVE-2022-29234: Grace period for lock settings in public/private chats in BigBlueButton
First published: Wed Jun 01 2022(Updated: )
BigBlueButton is an open source web conferencing system. Starting in version 2.2 and prior to versions 2.3.18 and 2.4.1, an attacker could send messages to a locked chat within a grace period of 5s any lock setting in the meeting was changed. The attacker needs to be a participant in the meeting. Versions 2.3.18 and 2.4.1 contain a patch for this issue. There are currently no known workarounds.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Bigbluebutton Bigbluebutton | >=2.2.0<2.3.18 | |
| Bigbluebutton Bigbluebutton | >=2.4<2.4.1 |
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Reference Links
- https://github.com/bigbluebutton/bigbluebutton/pull/13850
- https://github.com/bigbluebutton/bigbluebutton/pull/14265
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18
- https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4.1
- https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-36vc-c338-6xjv
Frequently Asked Questions
What is CVE-2022-29234?
CVE-2022-29234 is a vulnerability in BigBlueButton, an open source web conferencing system, where an attacker could send messages to a locked chat within a grace period of 5s after the lock setting was enacted.
How does CVE-2022-29234 affect BigBlueButton?
CVE-2022-29234 affects BigBlueButton versions 2.2 to 2.3.18 and versions 2.4 to 2.4.1.
What is the severity of CVE-2022-29234?
CVE-2022-29234 has a severity rating of 4.3, which is considered medium.
How can an attacker exploit CVE-2022-29234?
An attacker needs to be a participant in the meeting and can send messages to a locked chat within 5 seconds after the lock setting was enacted.
How can I fix CVE-2022-29234 in BigBlueButton?
To fix CVE-2022-29234, you should update your BigBlueButton installation to version 2.3.18 or 2.4.1, which contain the necessary security patches.
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- canonical/bigbluebutton bigbluebutton
- version/bigbluebutton bigbluebutton/2.2.0
- version/bigbluebutton bigbluebutton/2.4