UBUNTU-CVE-2019-15753

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    UBUNTU-CVE-2019-15753

    Published: 28 Aug 2019Last Modified: 24 Oct 2025
    Upstream:
    CVE-2019-15753

    Summary:

    Details: In OpenStack os-vif 1.15.x before 1.15.2, and 1.16.0, a hard-coded MAC aging time of 0 disables MAC learning in linuxbridge, forcing obligatory Ethernet flooding of non-local destinations, which both impedes network performance and allows users to possibly view the content of packets for instances belonging to other tenants sharing the same network. Only deployments using the linuxbridge backend are affected. This occurs in PyRoute2.add() in internal/command/ip/linux/impl_pyroute2.py.

    References: https://ubuntu.com/security/CVE-2019-15753, https://security.openstack.org/ossa/OSSA-2019-004.html, http://www.openwall.com/lists/oss-security/2019/08/29/2, https://review.opendev.org/672834, https://review.opendev.org/678098, https://www.cve.org/CVERecord?id=CVE-2019-15753

    Affected packages

    Package

    Name: python-os-vif

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.17.0-0ubuntu1

    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-2019-15753 | CVE-DB