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CVE-2022-29169

7.5 · HIGH

BigBlueButton is an open source web conferencing system.

Published Jun 1, 2022CWE-20EPSS 1.56%

Overview

CVE-2022-29169 is a high-severity vulnerability. It was published on June 1, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

BigBlueButton is an open source web conferencing system. Versions starting with 2.2 and prior to 2.3.19, 2.4.7, and 2.5.0-beta.2 are vulnerable to regular expression denial of service (ReDoS) attacks. By using specific a RegularExpression, an attacker can cause denial of service for the bbb-html5 service. The useragent library performs checking of device by parsing the input of User-Agent header and lets it go through lookupUserAgent() (alias of useragent.lookup() ). This function handles input by regexing and attackers can abuse that by providing some ReDos payload using `SmartWatch`. The maintainers removed `htmlclient/useragent` from versions 2.3.19, 2.4.7, and 2.5.0-beta.2. As a workaround, disable NginX forwarding the requests to the handler according to the directions in the GitHub Security Advisory.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/bigbluebutton/bigbluebutton/pull/14886GitHubgithub.com/bigbluebutton/bigbluebutton/pull/14896GitHubgithub.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-rwrv-p665-4vwpGitHubgithub.com/bigbluebutton/bigbluebutton/pull/14886GitHubgithub.com/bigbluebutton/bigbluebutton/pull/14896GitHubgithub.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-rwrv-p665-4vwp

How CyberStrike helps

Frequently asked questions

What is CVE-2022-29169?

CVE-2022-29169 is a high-severity vulnerability. It was published on June 1, 2022 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2022-29169?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2022-29169?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-29169?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-29169 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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