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CVE-2022-29232— Exposure of messages in BigBlueButton public chats

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版本到2.3.9和2.4-beta-1 版本存在信息泄露漏洞，该漏洞源于服务会议公告聊天消息缺少信息保护措施和访问控制。攻击者可以利用该漏洞绕过访问控制从服务器上的不同会议中获取公共聊天消息的内容。

CVSS 6.5 · Medium EPSS 1.06% · P63

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2022-29232

Vulnerability Information
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Vulnerability Title
Exposure of messages in BigBlueButton public chats
Source: CVE Program / CVE List V5
Vulnerability Description
BigBlueButton is an open source web conferencing system. Starting with version 2.2 and prior to versions 2.3.9 and 2.4-beta-1, an attacker can circumvent access controls to obtain the content of public chat messages from different meetings on the server. The attacker must be a participant in a meeting on the server. BigBlueButton versions 2.3.9 and 2.4-beta-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:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
BigBlueButton 信息泄露漏洞
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版本到2.3.9和2.4-beta-1 版本存在信息泄露漏洞，该漏洞源于服务会议公告聊天消息缺少信息保护措施和访问控制。攻击者可以利用该漏洞绕过访问控制从服务器上的不同会议中获取公共聊天消息的内容。
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, < 2.3.9 -

II. Public POCs for CVE-2022-29232

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III. Intelligence Information for CVE-2022-29232

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Patches & Fixes for CVE-2022-29232 (1)

Vendor Advisories for CVE-2022-29232 (1)

Other References for CVE-2022-29232 (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-2022-29235 5.3 MEDIUM Limited data exposure for shared external videos in BigBlueButton
CVE-2022-29233 4.3 MEDIUM Improper access control for breakout rooms in BigBlue Button
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-200

V. Comments for CVE-2022-29232

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