CVEvulnerability

CVE-2022-31152

7.5 HIGH Published 2022-09-02 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2022-09-02
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.4 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-703, CWE-755

Description

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix specification specifies a list of event authorization rules which must be checked when determining if an event should be accepted into a room. In versions of Synapse up to and including version 1.61.0, some of these rules are not correctly applied. An attacker could craft events which would be accepted by Synapse but not a spec-conformant server, potentially causing divergence in the room state between servers. Administrators of homeservers with federation enabled are advised to upgrade to version 1.62.0 or higher. Federation can be disabled by setting `federation_domain_whitelist` to an empty list (`[]`) as a workaround.

Affected configurations

• matrix synapse (< 1.62.0)

Related

Weakness · CWE (2)

  • CWE-703 Improper Check or Handling of Exceptional Conditions weakness
  • CWE-755 Improper Handling of Exceptional Conditions weakness

References