UBUNTU-CVE-2019-9946

    Dashboard / Vulnerabilities / UBUNTU-CVE-2019-9946

    UBUNTU-CVE-2019-9946

    Published: 2 Apr 2019Last Modified: 14 Jul 2025
    Upstream:
    CVE-2019-9946

    Summary:

    Details: Cloud Native Computing Foundation (CNCF) CNI (Container Networking Interface) 0.7.4 has a network firewall misconfiguration which affects Kubernetes. The CNI 'portmap' plugin, used to setup HostPorts for CNI, inserts rules at the front of the iptables nat chains; which take precedence over the KUBE- SERVICES chain. Because of this, the HostPort/portmap rule could match incoming traffic even if there were better fitting, more specific service definition rules like NodePorts later in the chain. The issue is fixed in CNI 0.7.5 and Kubernetes 1.11.9, 1.12.7, 1.13.5, and 1.14.0.

    References: https://ubuntu.com/security/CVE-2019-9946, https://bugzilla.redhat.com/show_bug.cgi?id=1692712, https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272, https://www.cve.org/CVERecord?id=CVE-2019-9946

    Affected packages

    Package

    Name: kubernetes

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.0

    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