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CVE-2022-29233— Improper access control for breakout rooms in BigBlue Button

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 2.2 到 2.3.18 和 2.4-rc-1 之前版本存在授权问题漏洞，攻击者利用该漏洞可以绕过访问控制来访问他们所在会议的所有分组会议室。

CVSS 4.3 · Medium EPSS 1.03% · P63
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I. Basic Information for CVE-2022-29233

Vulnerability Information
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Vulnerability Title
Improper access control for breakout rooms in BigBlue Button
Source: CVE Program / CVE List V5
Vulnerability Description
BigBlueButton is an open source web conferencing system. In BigBlueButton starting with 2.2 but before 2.3.18 and 2.4-rc-1, an attacker can circumvent access controls to gain access to all breakout rooms of the meeting they are in. The permission checks rely on knowledge of internal ids rather than on verification of the role of the user. Versions 2.3.18 and 2.4-rc-1 contain a patch for this issue. There are currently no known workarounds.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
BigBlueButton 授权问题漏洞
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 2.2 到 2.3.18 和 2.4-rc-1 之前版本存在授权问题漏洞，攻击者利用该漏洞可以绕过访问控制来访问他们所在会议的所有分组会议室。
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 >= 2.2, < 2.3.18 -

II. Public POCs for CVE-2022-29233

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III. Intelligence Information for CVE-2022-29233

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Patches & Fixes for CVE-2022-29233 (2)

Vendor Advisories for CVE-2022-29233 (1)

Other References for CVE-2022-29233 (2)

Same Patch Batch · bigbluebutton · 2022-06-01 · 6 CVEs total

CVE-2022-29169 7.5 HIGH ReDoS on endpoint html5client/useragent in BigBlueButton
CVE-2022-29232 6.5 MEDIUM Exposure of messages in BigBlueButton public chats
CVE-2022-29235 5.3 MEDIUM Limited data exposure for shared external videos in BigBlueButton
CVE-2022-29234 4.3 MEDIUM Grace period for lock settings in public/private chats in BigBlueButton
CVE-2022-29236 4.3 MEDIUM Improper access control for pencil annotations in BigBlueButton

IV. Related Vulnerabilities

Same product: bigbluebutton
Same vendor: bigbluebutton
Same weakness: CWE-285

V. Comments for CVE-2022-29233

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