CVE-2022-29169 (GCVE-0-2022-29169)
Vulnerability from cvelistv5
Published
2022-06-01 22:20
Modified
2025-04-23 18:20
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-20 - Improper Input Validation
Summary
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.
References
security-advisories@github.comhttps://github.com/bigbluebutton/bigbluebutton/pull/14886Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/bigbluebutton/bigbluebutton/pull/14896Patch, Third Party Advisory
security-advisories@github.comhttps://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-rwrv-p665-4vwpMitigation, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/bigbluebutton/bigbluebutton/pull/14886Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/bigbluebutton/bigbluebutton/pull/14896Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-rwrv-p665-4vwpMitigation, Patch, Third Party Advisory
Impacted products
Vendor Product Version
bigbluebutton bigbluebutton Version: >= 2.2, < 2.3.19
Version: >= 2.4.0, < 2.4.7
Version: >= 2.5-alpha-1, < 2.5.0-beta.2
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