CVE-2021-34431

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    CVE-2021-34431

    Published: 22 Jul 2021Last Modified: 27 Aug 2026

    Summary:

    Details: In Eclipse Mosquitto version 1.6 to 2.0.10, if an authenticated client that had connected with MQTT v5 sent a crafted CONNECT message to the broker a memory leak would occur, which could be used to provide a DoS attack against the broker.

    References: https://bugs.eclipse.org/bugs/show_bug.cgi?id=573191

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 4555ee79e513d9a6dc5c13d527c56cb2cfdd24d0
    Fixed -None

    Affected versions

    v2.0.10
    v2.0.9
    v2.0.8
    v2.0.7
    v2.0.6
    v2.0.5
    v2.0.4
    v2.0.3
    v2.0.2
    v2.0.1
    v2.0.0

    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
    CVE-2021-34431 | CVE-DB