Vulnerability Description
matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. Attackers can specify a specific string of characters, which would confuse the bridge into combining an attacker-owned channel and an existing channel, allowing them to grant themselves permissions in the channel. The vulnerability has been patched in matrix-appservice-irc 0.35.0. As a workaround operators may disable dynamic channel joining via `dynamicChannels.enabled` to prevent users from joining new channels, which prevents any new channels being bridged outside of what is already bridged, and what is specified in the config.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Matrix | Matrix Irc Bridge | < 0.35.0 |
Related Weaknesses (CWE)
References
- https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-xvqMitigationThird Party Advisory
- https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-3Vendor Advisory
- https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-xvqMitigationThird Party Advisory
- https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-3Vendor Advisory
FAQ
What is CVE-2022-39203?
CVE-2022-39203 is a vulnerability with a CVSS score of 8.8 (HIGH). matrix-appservice-irc is an open source Node.js IRC bridge for Matrix. Attackers can specify a specific string of characters, which would confuse the bridge into combining an attacker-owned channel an...
How severe is CVE-2022-39203?
CVE-2022-39203 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-39203?
Check the references section above for vendor advisories and patch information. Affected products include: Matrix Matrix Irc Bridge.