CVE-2022-29169

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.

Affected products

Bigbluebutton, Nginx

Bigbluebutton

< 2.3.19, 2.4.7, 2.5

Fix

Available

CVSS 3.1

7.5 HIGH

EPSS

1.5% (71th percentile)

Weakness

CWE-1333, CWE-20

NVD status

Modified

Published

2022-06-01

No exploit for CVE-2022-29169 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.