CVE-2022-29236

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
GitHub_MCNA
4.3 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 28%
VendorProductVersion
bigbluebuttonbigbluebutton
2.2.0 ≤
𝑥
< 2.3.18
bigbluebuttonbigbluebutton
2.4:alpha1
bigbluebuttonbigbluebutton
2.4:alpha2
bigbluebuttonbigbluebutton
2.4:beta1
bigbluebuttonbigbluebutton
2.4:beta2
bigbluebuttonbigbluebutton
2.4:beta3
bigbluebuttonbigbluebutton
2.4:beta4
bigbluebuttonbigbluebutton
2.4:rc1
bigbluebuttonbigbluebutton
2.4:rc3
bigbluebuttonbigbluebutton
2.4:rc4
bigbluebuttonbigbluebutton
2.4:rc5
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
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
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
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-p93g-r9gm-9v6r