CVE-2022-29169

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Summary

CVECVE-2022-29169
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-06-01 23:15:00 UTC
Updated2023-07-21 16:40:00 UTC
DescriptionBigBlueButton 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.

Risk And Classification

Problem Types: CWE-1333

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Bigbluebutton Bigbluebutton All All All All
Application Bigbluebutton Bigbluebutton 2.5 alpha1 All All
Application Bigbluebutton Bigbluebutton 2.5 alpha2 All All
Application Bigbluebutton Bigbluebutton 2.5 alpha3 All All
Application Bigbluebutton Bigbluebutton 2.5 alpha4 All All
Application Bigbluebutton Bigbluebutton 2.5 alpha5 All All
Application Bigbluebutton Bigbluebutton 2.5 alpha6 All All
Application Bigbluebutton Bigbluebutton 2.5 beta1 All All

References

ReferenceSourceLinkTags
refactor: Remove the endpoint html5/useragent by gustavotrott · Pull Request #14886 · bigbluebutton/bigbluebutton · GitHub MISC github.com
fix: Backport refactor: Remove the endpoint html5/useragent #14886 by antobinary · Pull Request #14896 · bigbluebutton/bigbluebutton · GitHub MISC github.com
ReDoS on endpoint html5client/useragent · Advisory · bigbluebutton/bigbluebutton · GitHub CONFIRM github.com
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