CVE-2022-29234

Grace period for lock settings in public/private chats in BigBlueButton

CVSS 4.3 MEDIUMEPSS 0.8%CWE-285

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.3EPSS 0.8%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

01 Jun 2022Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Affected products

bigbluebutton · bigbluebutton

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References

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