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CVE-2022-41963— BigBlueButton contains Improper Preservation of Permissions for whiteboard

Quick assessment

Affected
bigbluebutton bigbluebutton
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

BigBlueButton是BigBlueButton社区的一套开源的Web会议系统。 BigBlueButton 2.4.3之前版本存在安全漏洞，该漏洞源于包含用于处理延迟消息的白板宽限期，攻击者利用该漏洞可以利用该宽限期在其访问权被撤销后的几秒钟内采取行动。

CVSS 2.7 · Low EPSS 0.44% · P36

Possible ATT&CK Techniques 1 AI

T1098.004 · SSH Authorized Keys
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I. Basic Information for CVE-2022-41963

Vulnerability Information
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Vulnerability Title
BigBlueButton contains Improper Preservation of Permissions for whiteboard
Source: CVE Program / CVE List V5
Vulnerability Description
BigBlueButton is an open source web conferencing system. Versions prior to 2.4.3 contain a whiteboard grace period that exists to handle delayed messages, but this grace period could be used by attackers to take actions in the few seconds after their access is revoked. The attacker must be a meeting participant. This issue is patched in version 2.4.3 an version 2.5-alpha-1
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
权限预留不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
BigBlueButton 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
BigBlueButton是BigBlueButton社区的一套开源的Web会议系统。 BigBlueButton 2.4.3之前版本存在安全漏洞，该漏洞源于包含用于处理延迟消息的白板宽限期，攻击者利用该漏洞可以利用该宽限期在其访问权被撤销后的几秒钟内采取行动。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
bigbluebutton bigbluebutton < 2.4.3 -

II. Public POCs for CVE-2022-41963

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III. Intelligence Information for CVE-2022-41963

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Vendor Advisories for CVE-2022-41963 (1)

Other References for CVE-2022-41963 (1)

Same Patch Batch · bigbluebutton · 2022-12-16 · 5 CVEs total

CVE-2022-41964 5.7 MEDIUM BigBlueButton contains Response leaks in anonymous polls
CVE-2022-23490 4.3 MEDIUM Improper access control to polling votes
CVE-2022-41961 4.3 MEDIUM BigBlueButton subject to Ineffective user bans
CVE-2022-41962 2.7 LOW BigBlueButton contains Incorrect Authorization for setting emoji status

IV. Related Vulnerabilities

Same product: bigbluebutton
Same vendor: bigbluebutton
Same weakness: CWE-281

V. Comments for CVE-2022-41963

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