CVE-2022-29234 Grace period for lock settings in public/private chats in BigBlueButton
Participants can bypass chat locks and send messages during a brief grace period after lock settings change in BigBlueButton meetings.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-29234?
CVE-2022-29234 is a medium-severity missing authorization vulnerability in bigbluebutton, published on 1 Jun 2022. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-285
Which versions are affected by CVE-2022-29234?
It affects 1 product.
Products include Bigbluebutton Bigbluebutton.
How do I fix CVE-2022-29234?
No fix has been published for CVE-2022-29234 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2022-29234 being exploited?
There is no known exploitation of CVE-2022-29234 in the wild and no public exploit code.
Other vulnerabilities in bigbluebutton
Sources
Also known as GHSA-36vc-c338-6xjv.