Vulnerabilities > CVE-2023-33176 - Server-Side Request Forgery (SSRF) vulnerability in Bigbluebutton

CVSS 6.5 - MEDIUM

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

LOW

Integrity impact

LOW

Availability impact

NONE

network

low complexity

bigbluebutton

CWE-918

NVD

Published: 2023-06-26

Updated: 2023-07-05

Summary

BigBlueButton is an open source virtual classroom designed to help teachers teach and learners learn. In affected versions are affected by a Server-Side Request Forgery (SSRF) vulnerability. In an `insertDocument` API request the user is able to supply a URL from which the presentation should be downloaded. This URL was being used without having been successfully validated first. An update to the `followRedirect` method in the `PresentationUrlDownloadService` has been made to validate all URLs to be used for presentation download. Two new properties `presentationDownloadSupportedProtocols` and `presentationDownloadBlockedHosts` have also been added to `bigbluebutton.properties` to allow administrators to define what protocols a URL must use and to explicitly define hosts that a presentation cannot be downloaded from. All URLs passed to `insertDocument` must conform to the requirements of the two previously mentioned properties. Additionally, these URLs must resolve to valid addresses, and these addresses must not be local or loopback addresses. There are no workarounds. Users are advised to upgrade to a patched version of BigBlueButton.

Vulnerable Configurations

Part	Description	Count
Application	Bigbluebutton Bigbluebutton Bigbluebutton 2.6.0 Bigbluebutton Bigbluebutton 2.6.1 Bigbluebutton Bigbluebutton 2.6.2 Bigbluebutton Bigbluebutton 2.6.3 Bigbluebutton Bigbluebutton 2.6.4 Bigbluebutton Bigbluebutton 2.6.5 Bigbluebutton Bigbluebutton 2.6.6 Bigbluebutton Bigbluebutton 2.6.7 Bigbluebutton Bigbluebutton 2.6.8 Bigbluebutton Bigbluebutton - Bigbluebutton Bigbluebutton 0.7 Bigbluebutton Bigbluebutton 0.8 Bigbluebutton Bigbluebutton 0.9.0 Bigbluebutton Bigbluebutton 0.9.1 Bigbluebutton Bigbluebutton 0.9.2 Bigbluebutton Bigbluebutton 0.71 Bigbluebutton Bigbluebutton 0.81 Bigbluebutton Bigbluebutton 1.0.0 Bigbluebutton Bigbluebutton 1.1.0 Bigbluebutton Bigbluebutton 2.0 Bigbluebutton Bigbluebutton 2.2.0 Bigbluebutton Bigbluebutton 2.2.1 Bigbluebutton Bigbluebutton 2.2.2 Bigbluebutton Bigbluebutton 2.2.3 Bigbluebutton Bigbluebutton 2.2.4 Bigbluebutton Bigbluebutton 2.2.5 Bigbluebutton Bigbluebutton 2.2.6 Bigbluebutton Bigbluebutton 2.2.7 Bigbluebutton Bigbluebutton 2.2.8 Bigbluebutton Bigbluebutton 2.2.9 Bigbluebutton Bigbluebutton 2.2.10 Bigbluebutton Bigbluebutton 2.2.11 Bigbluebutton Bigbluebutton 2.2.12 Bigbluebutton Bigbluebutton 2.2.14 Bigbluebutton Bigbluebutton 2.2.15 Bigbluebutton Bigbluebutton 2.2.16 Bigbluebutton Bigbluebutton 2.2.17 Bigbluebutton Bigbluebutton 2.2.18 Bigbluebutton Bigbluebutton 2.2.19 Bigbluebutton Bigbluebutton 2.2.20 Bigbluebutton Bigbluebutton 2.2.21 Bigbluebutton Bigbluebutton 2.2.22 Bigbluebutton Bigbluebutton 2.2.23 Bigbluebutton Bigbluebutton 2.2.24 Bigbluebutton Bigbluebutton 2.2.25 Bigbluebutton Bigbluebutton 2.2.26 Bigbluebutton Bigbluebutton 2.2.27 Bigbluebutton Bigbluebutton 2.2.28 Bigbluebutton Bigbluebutton 2.2.29 Bigbluebutton Bigbluebutton 2.2.30 Bigbluebutton Bigbluebutton 2.2.31 Bigbluebutton Bigbluebutton 2.3 Bigbluebutton Bigbluebutton 2.3.0 Bigbluebutton Bigbluebutton 2.3.1 Bigbluebutton Bigbluebutton 2.3.2 Bigbluebutton Bigbluebutton 2.3.3 Bigbluebutton Bigbluebutton 2.3.4 Bigbluebutton Bigbluebutton 2.3.5 Bigbluebutton Bigbluebutton 2.3.6 Bigbluebutton Bigbluebutton 2.3.7 Bigbluebutton Bigbluebutton 2.3.8 Bigbluebutton Bigbluebutton 2.3.9 Bigbluebutton Bigbluebutton 2.3.10 Bigbluebutton Bigbluebutton 2.3.11 Bigbluebutton Bigbluebutton 2.3.12 Bigbluebutton Bigbluebutton 2.3.13 Bigbluebutton Bigbluebutton 2.3.14 Bigbluebutton Bigbluebutton 2.3.15 Bigbluebutton Bigbluebutton 2.3.16 Bigbluebutton Bigbluebutton 2.3.17 Bigbluebutton Bigbluebutton 2.4 Bigbluebutton Bigbluebutton 2.4.0 Bigbluebutton Bigbluebutton 2.4.1 Bigbluebutton Bigbluebutton 2.4.2 Bigbluebutton Bigbluebutton 2.4.3 Bigbluebutton Bigbluebutton 2.4.4 Bigbluebutton Bigbluebutton 2.4.5 Bigbluebutton Bigbluebutton 2.4.6 Bigbluebutton Bigbluebutton 2.4.7 Bigbluebutton Bigbluebutton 2.4.9 Bigbluebutton Bigbluebutton 2.5 Bigbluebutton Bigbluebutton 2.5.1 Bigbluebutton Bigbluebutton 2.5.2 Bigbluebutton Bigbluebutton 2.5.3 Bigbluebutton Bigbluebutton 2.5.4 Bigbluebutton Bigbluebutton 2.5.5 Bigbluebutton Bigbluebutton 2.5.6 Bigbluebutton Bigbluebutton 2.5.7 Bigbluebutton Bigbluebutton 2.5.8 Bigbluebutton Bigbluebutton 2.5.9 Bigbluebutton Bigbluebutton 2.5.10 Bigbluebutton Bigbluebutton 2.5.11 Bigbluebutton Bigbluebutton 2.5.12 Bigbluebutton Bigbluebutton 2.5.14 Bigbluebutton Bigbluebutton 2.5.15 Bigbluebutton Bigbluebutton 2.5.16 Bigbluebutton Bigbluebutton 2.5.17 Bigbluebutton Bigbluebutton 2.5.18	194

Common Weakness Enumeration (CWE)

CWE-918 - Server-Side Request Forgery (SSRF)

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

References