CVE Vulnerability

CVE-2022-31152

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](https://spec.matrix.org/v1.2/rooms/v9/#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`](https://matrix-org.github.io/synapse/latest/usage/configuration/config_documentation.html#federation_domain_whitelist) to an empty list (`[]`) as a workaround.

7.5 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/matrix-org/synapse/pull/13087 Issue Tracking Patch
https://github.com/matrix-org/synapse/pull/13088 Issue Tracking Patch
https://github.com/matrix-org/synapse/releases/tag/v1.62.0 Release Notes Third Party Advisory
https://github.com/matrix-org/synapse/security/advisories/GHSA-jhjh-776m-4765 Issue Tracking Mitigation
Configurations

Configuration 1

cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*
Information

Published : 2022-09-02 08:15

Updated : 2022-09-09 03:21

NVD link : CVE-2022-31152

Mitre link : CVE-2022-31152

Products Affected
No products.
CWE
CWE-755