GHSA-xvqg-mv25-rwvw
Parsing issue in matrix-org/node-irc leading to room takeovers
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | matrix-appservice-irc | < 0.35.0 | 0.35.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
### 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 [[email protected]](mailto:[email protected]).
References
External links from the advisory. They lead to third-party sites.