UBUNTU-CVE-2018-10657

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    UBUNTU-CVE-2018-10657

    Published: 2 May 2018Last Modified: 4 Feb 2026
    Upstream:
    CVE-2018-10657
    Aliases:
    USN-6076-1

    Summary:

    Details: Matrix Synapse before 0.28.1 is prone to a denial of service flaw where malicious events injected with depth = 2^63 - 1 render rooms unusable, related to federation/federation_base.py and handlers/message.py, as exploited in the wild in April 2018.

    References: https://ubuntu.com/security/CVE-2018-10657, https://github.com/matrix-org/synapse/commit/33f469ba19586bbafa0cf2c7d7c35463bdab87eb, https://matrix.org/blog/2018/05/01/security-update-synapse-0-28-1/, https://docs.google.com/document/d/1I3fi2S-XnpO45qrpCsowZv8P8dHcNZ4fsBsbOW7KABI/edit#heading=h.fj95ykuss7s1, https://ubuntu.com/security/notices/USN-6076-1, https://www.cve.org/CVERecord?id=CVE-2018-10657

    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