UBUNTU-CVE-2019-11842

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    UBUNTU-CVE-2019-11842

    Published: 9 May 2019Last Modified: 4 Feb 2026
    Upstream:
    CVE-2019-11842
    Aliases:
    USN-6076-1

    Summary:

    Details: An issue was discovered in Matrix Sydent before 1.0.3 and Synapse before 0.99.3.1. Random number generation is mishandled, which makes it easier for attackers to predict a Sydent authentication token or a Synapse random ID.

    References: https://ubuntu.com/security/CVE-2019-11842, https://matrix.org/blog/2019/05/03/security-updates-sydent-1-0-3-synapse-0-99-3-1-and-riot-android-0-9-0-0-8-99-0-8-28-a/, https://ubuntu.com/security/notices/USN-6076-1, https://www.cve.org/CVERecord?id=CVE-2019-11842

    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