UBUNTU-CVE-2019-6454

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    UBUNTU-CVE-2019-6454

    Published: 19 Feb 2019Last Modified: 22 Apr 2026
    Upstream:
    CVE-2019-6454
    Aliases:
    USN-3891-1

    Summary:

    Details: An issue was discovered in sd-bus in systemd 239. bus_process_object() in libsystemd/sd-bus/bus-objects.c allocates a variable-length stack buffer for temporarily storing the object path of incoming D-Bus messages. An unprivileged local user can exploit this by sending a specially crafted message to PID1, causing the stack pointer to jump over the stack guard pages into an unmapped memory region and trigger a denial of service (systemd PID1 crash and kernel panic).

    References: https://ubuntu.com/security/CVE-2019-6454, https://ubuntu.com/security/notices/USN-3891-1, https://www.cve.org/CVERecord?id=CVE-2019-6454

    Affected packages

    Package

    Name: systemd

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -229-4ubuntu21.16

    Affected versions

    225-1ubuntu9

    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