Vulnerabilities > CVE-2022-39200 - Unspecified vulnerability in Matrix Dendrite
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
LOW Availability impact
NONE Summary
Dendrite is a Matrix homeserver written in Go. In affected versions events retrieved from a remote homeserver using the `/get_missing_events` path did not have their signatures verified correctly. This could potentially allow a remote homeserver to provide invalid/modified events to Dendrite via this endpoint. Note that this does not apply to events retrieved through other endpoints (e.g. `/event`, `/state`) as they have been correctly verified. Homeservers that have federation disabled are not vulnerable. The problem has been fixed in Dendrite 0.9.8. Users are advised to upgrade. There are no known workarounds for this issue.
Vulnerable Configurations
References
- https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3
- https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3
- https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c
- https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c