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CVE-2022-29235— Limited data exposure for shared external videos in BigBlueButton

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-6 版本存在安全漏洞，攻击者利用该漏洞可以找到与正在共享的外部视频相关的信息。

CVSS 5.3 · Medium EPSS 1.05% · P63

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2022-29235

Vulnerability Information
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Vulnerability Title
Limited data exposure for shared external videos in BigBlueButton
Source: CVE Program / CVE List V5
Vulnerability Description
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 who is able to obtain the meeting identifier for a meeting on a server can find information related to an external video being shared, like the current timestamp and play/pause. The problem has been patched in versions 2.3.18 and 2.4-rc-6 by modifying the stream to send the data only for users in the meeting. There are currently no known workarounds.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 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 2.2 到 2.3.18 和 2.4-rc-6 版本存在安全漏洞，攻击者利用该漏洞可以找到与正在共享的外部视频相关的信息。
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-2022-29235

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III. Intelligence Information for CVE-2022-29235

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Patches & Fixes for CVE-2022-29235 (2)

Vendor Advisories for CVE-2022-29235 (1)

Other References for CVE-2022-29235 (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-2022-29233 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-2022-29235

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