Vulnerabilities > CVE-2022-29169 - Unspecified vulnerability in Bigbluebutton

CVSS 7.5 - HIGH

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

NONE

Integrity impact

NONE

Availability impact

HIGH

network

low complexity

bigbluebutton

NVD

Published: 2022-06-01

Updated: 2023-07-21

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.

Vulnerable Configurations

Part	Description	Count
Application	Bigbluebutton Bigbluebutton Bigbluebutton 2.5 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 2.4.0 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	98

Summary

Vulnerable Configurations

References