CVE Vulnerabilities

CVE-2022-31152

Improper Check or Handling of Exceptional Conditions

Published: Sep 02, 2022 | Modified: Nov 21, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

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.

Weakness

The product does not properly anticipate or handle exceptional conditions that rarely occur during normal operation of the product.

Affected Software

Name Vendor Start Version End Version
Synapse Matrix * 1.62.0 (excluding)
Matrix-synapse Ubuntu bionic *
Matrix-synapse Ubuntu trusty *
Matrix-synapse Ubuntu upstream *
Matrix-synapse Ubuntu xenial *

References