Source: matrix-synapse X-Debbugs-CC: t...@security.debian.org Severity: grave Tags: security
Hi, The following vulnerability was published for matrix-synapse. CVE-2024-31208[0]: | Synapse is an open-source Matrix homeserver. A remote Matrix user | with malicious intent, sharing a room with Synapse instances before | 1.105.1, can dispatch specially crafted events to exploit a weakness | in the V2 state resolution algorithm. This can induce high CPU | consumption and accumulate excessive data in the database of such | instances, resulting in a denial of service. Servers in private | federations, or those that do not federate, are not affected. Server | administrators should upgrade to 1.105.1 or later. Some workarounds | are available. One can ban the malicious users or ACL block servers | from the rooms and/or leave the room and purge the room using the | admin API. https://github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4v https://github.com/element-hq/synapse/commit/55b0aa847a61774b6a3acdc4b177a20dc019f01a (v1.105.1) If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2024-31208 https://www.cve.org/CVERecord?id=CVE-2024-31208 Please adjust the affected versions in the BTS as needed.
