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CVE-2023-43798— BigBlueButton Blind SSRF When Uploading Presentation (mitigation bypass)

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存在代码问题漏洞，该漏洞源于容易受到服务器端请求伪造(SSRF)攻击。

CVSS 5.6 · Medium EPSS 0.42% · P34

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-43798

Vulnerability Information
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Vulnerability Title
BigBlueButton Blind SSRF When Uploading Presentation (mitigation bypass)
Source: CVE Program / CVE List V5
Vulnerability Description
BigBlueButton is an open-source virtual classroom. BigBlueButton prior to versions 2.6.12 and 2.7.0-rc.1 is vulnerable to Server-Side Request Forgery (SSRF). This issue is a bypass of CVE-2023-33176. A patch in versions 2.6.12 and 2.7.0-rc.1 disabled follow redirect at `httpclient.execute` since the software no longer has to follow it when using `finalUrl`. There are no known workarounds. We recommend upgrading to a patched version of BigBlueButton.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
BigBlueButton 代码问题漏洞
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存在代码问题漏洞，该漏洞源于容易受到服务器端请求伪造(SSRF)攻击。
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 < 2.6.12 -

II. Public POCs for CVE-2023-43798

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III. Intelligence Information for CVE-2023-43798

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Patches & Fixes for CVE-2023-43798 (2)

Vendor Advisories for CVE-2023-43798 (2)

Same Patch Batch · bigbluebutton · 2023-10-30 · 4 CVEs total

CVE-2023-43797 6.3 MEDIUM BigBlueButton Stored Cross-site Scripting vulnerability at Guest Lobby
CVE-2023-42803 5.3 MEDIUM BigBlueButton Unrestricted File Upload vulnerability
CVE-2023-42804 3.1 LOW BigBlueButton Path Traversal – Reading Certain File Extensions

IV. Related Vulnerabilities

Same product: bigbluebutton
Same vendor: bigbluebutton
Same weakness: CWE-918

V. Comments for CVE-2023-43798

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