matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms
### Impact It was possible to craft an event such that it would leak part of a targeted message event from another bridged room. This required knowing an event ID to target. ### Patches Please upgrade to 1.0.1. ### Workarounds You can set the `matrixHandler.eventCacheSize` config value to `0` to workaround this bug. However, this may impact performance. ### 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).
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2023-38700US | low3.7 | — | ||
matrix-appservice-irc is a Node.js IRC bridge for Matrix. Prior to version 1.0.1, it was possible to craft an event such that it would leak part of a targeted message event from an… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/matrix-org/matrix-appservice-ircPACKAGE
- https://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9b5c973fd89d61498d75WEB
- https://github.com/matrix-org/matrix-appservice-irc/releases/tag/1.0.1WEB
- https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-c7hh-3v6c-fj4qWEB
- https://nvd.nist.gov/vuln/detail/CVE-2023-38700ADVISORY
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