Detections
Analytics
CVE-2023-45129
medium
Description
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API.
References
https://security.gentoo.org/glsa/202401-12
https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version
https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4