CVE-2023-45129

2023-10-1018:15:19

CWE-770

[email protected]

web.nvd.nist.gov

synapse

matrix homeserver

cve-2023-45129

open source

denial of service

acl

security update

4.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

4.9 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

49.0%

JSON

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.

Affected configurations

Vulners

NVD

Node

matrix-orgsynapseRange<1.94.0

CPENameOperatorVersion
matrix:synapsematrix synapselt1.94.0

CPE	Name	Operator	Version
matrix:synapse	matrix synapse	lt	1.94.0

CNA Affected

[
  {
    "vendor": "matrix-org",
    "product": "synapse",
    "versions": [
      {
        "version": "< 1.94.0",
        "status": "affected"
      }
    ]
  }
]