PYSEC-2023-199

    Dashboard / Vulnerabilities / PYSEC-2023-199

    PYSEC-2023-199

    Published: 10 Oct 2023Last Modified: 8 Nov 2023

    Summary:

    Details: 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.

    References: https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version, https://github.com/matrix-org/synapse/pull/16360, https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4

    Affected packages

    Package

    Name: matrix-synapse

    Purl: pkg:pypi/matrix-synapse

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.94.0

    Affected versions

    0.33.5
    0.33.5.1
    0.33.6
    0.33.6rc1
    0.33.7
    0.33.7rc1
    0.33.7rc2
    0.33.8
    0.33.8rc2
    0.33.9

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    PYSEC-2023-199 | CVE-DB