Medium severity · published Jun 2, 2022
CVE-2022-29236
BigBlueButton is an open source web conferencing system
4.3
CVSS
0.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BI
Bigbluebutton · Bigbluebutton
2.2.0 before 2.3.18; 2.4; 2.4; 2.4; 2.4; 2.4; +5 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-29236
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-29236
Patch
https://github.com/bigbluebutton/bigbluebutton/pull/13803
Patch
https://github.com/bigbluebutton/bigbluebutton/pull/14265
Release Notes
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.3.18
Release Notes
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v2.4-rc-6
Patch
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-p93g-r9gm-9v6r
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