Bigbluebutton
CVE-2022-29236
MEDIUM
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
1DescriptionNVD
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.
AnalysisAI
BigBlueButton is an open source web conferencing system. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, low attack complexity.
Technical ContextAI
This vulnerability is classified under CWE-285. 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. Affected products include: Bigbluebutton. Version information: version 2.2.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
More in Bigbluebutton
View allBigBlueButton through 2.2.28 uses Ghostscript for processing of uploaded EPS documents, and consequently may be subject
BigBlueButton before 2.2.6 allows remote attackers to read arbitrary files because the presfilename (lowercase) value ca
The installation procedure in BigBlueButton before 2.2.28 (or earlier) uses ClueCon as the FreeSWITCH password, which al
An issue was discovered in BigBlueButton through 2.2.29. Rated high severity (CVSS 7.5), this vulnerability is remotely
The installation procedure in BigBlueButton before 2.2.28 (or earlier) exposes certain network services to external inte
BigBlueButton before 2.2.27 has an unsafe JODConverter setting in which LibreOffice document conversions can access exte
BigBlueButton before 2.2.5 allows remote attackers to obtain sensitive files via Local File Inclusion. Rated high severi
BigBlueButton versions 3.0.21 and below allow remote denial of service when ClamAV is configured following official docu
In BigBlueButton before 2.2.28 (or earlier), the client-side Mute button only signifies that the server should stop acce
BigBlueButton before 2.3 does not implement LibreOffice sandboxing. Rated medium severity (CVSS 6.5), this vulnerability
BigBlueButton before 2.2.7 allows remote authenticated users to read local files and conduct SSRF attacks via an uploade
In BigBlueButton before 2.2.28 (or earlier), uploaded presentations are sent to clients without a Content-Type header, w
Same weakness CWE-285 – Improper Authorization
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today