UBUNTU-CVE-2018-12291

    Dashboard / Vulnerabilities / UBUNTU-CVE-2018-12291

    UBUNTU-CVE-2018-12291

    Published: 13 Jun 2018Last Modified: 4 Feb 2026
    Upstream:
    CVE-2018-12291
    Aliases:
    USN-6076-1

    Summary:

    Details: The on_get_missing_events function in handlers/federation.py in Matrix Synapse before 0.31.1 has a security bug in the get_missing_events federation API where event visibility rules were not applied correctly.

    References: https://ubuntu.com/security/CVE-2018-12291, https://github.com/matrix-org/synapse/pull/3371, https://github.com/matrix-org/synapse/releases/tag/v0.31.1, https://ubuntu.com/security/notices/USN-6076-1, https://www.cve.org/CVERecord?id=CVE-2018-12291

    Affected packages

    Package

    Name: matrix-synapse

    Purl: pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.24.0+dfsg-1ubuntu0.1~esm1

    Affected versions

    0.19.2+dfsg-6

    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