matrix-org/matrix-appservice-irc · Security
matrix-appservice-irc events can be crafted to leak parts of targeted messages from other bridged rooms
- GHSA ID
- GHSA-c7hh-3v6c-fj4q
- CVE ID
- CVE-2023-38700
- Severity
- low
- Published
- Updated
- CVSS
- 3.5 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
- CVSS v3
- 3.5 · CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
Description
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.
For more information
If you have any questions or comments about this advisory email us at [email protected].
CWEs
- CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
References
- https://github.com/matrix-org/matrix-appservice-irc/security/advisories/GHSA-c7hh-3v6c-fj4q ↗
- https://github.com/matrix-org/matrix-appservice-irc/commit/8bbd2b69a16cbcbeffdd9b5c973fd89d61498d75 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2023-38700 ↗
- https://github.com/matrix-org/matrix-appservice-irc/releases/tag/1.0.1 ↗
- https://github.com/advisories/GHSA-c7hh-3v6c-fj4q ↗