UBUNTU-CVE-2019-18835

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    UBUNTU-CVE-2019-18835

    Published: 8 Nov 2019Last Modified: 4 Feb 2026
    Upstream:
    CVE-2019-18835
    Aliases:
    USN-6076-1

    Summary:

    Details: Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Events sent over /send_join, /send_leave, and /invite may not be correctly signed, or may not come from the expected servers.

    References: https://ubuntu.com/security/CVE-2019-18835, https://github.com/matrix-org/synapse/pull/6262, https://github.com/matrix-org/synapse/releases/tag/v1.5.0, https://ubuntu.com/security/notices/USN-6076-1, https://www.cve.org/CVERecord?id=CVE-2019-18835

    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
    UBUNTU-CVE-2019-18835 | CVE-DB