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.
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Wed, 23 Apr 2025 19:15:00 +0000
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2022-06-01T22:20:12.000Z
Updated: 2025-04-23T18:20:31.969Z
Reserved: 2022-04-13T00:00:00.000Z
Link: CVE-2022-29169

Updated: 2024-08-03T06:17:54.142Z

Status : Modified
Published: 2022-06-01T23:15:07.970
Modified: 2024-11-21T06:58:37.840
Link: CVE-2022-29169

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