CVE-2019-15753

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    CVE-2019-15753

    Published: 28 Aug 2019Last Modified: 8 Jul 2026

    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://launchpad.net/bugs/1837252, http://www.openwall.com/lists/oss-security/2019/08/29/2, https://review.opendev.org/672834, https://review.opendev.org/678098, https://security.openstack.org/ossa/OSSA-2019-004.html

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 1546d349b1656bc98286af47f1e2748b76743abc
    Fixed -ec9d5430300c908ea9a1c64151eee7af522a44e7

    Affected versions

    1.16.0

    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