GHSA-xvqg-mv25-rwvw
Parsing issue in matrix-org/node-irc leading to room takeovers
Quick fix
GHSA-xvqg-mv25-rwvw — matrix-appservice-irc: upgrade to the fixed version with the command below.
npm install matrix-appservice-irc@0.35.0Details
### Impact
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.
### Patched
The vulnerability has been patched in matrix-appservice-irc 0.35.0.
### Workarounds
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.
### References
- https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity
### Credits
Discovered and reported by [Val Lorentz](https://valentin-lorentz.fr/).
### For more information
If you have any questions or comments about this advisory email us at [security@matrix.org](mailto:security@matrix.org).
Are you affected?
Enter the version of the package you're using.
Affected packages
0Fixed in: 0.35.0npm install matrix-appservice-irc@0.35.0References
- https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-xvqg-mv25-rwvw[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2022-39203[ADVISORY]
- https://github.com/matrix-org/matrix-appservice-irc[PACKAGE]
- https://matrix.org/blog/2022/09/13/security-release-of-matrix-appservice-irc-0-35-0-high-severity[WEB]