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Red Hat: CVE-2019-9946: Incorrect rule injection in CNI portmap plugin (Multiple Advisories)

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Red Hat: CVE-2019-9946: Incorrect rule injection in CNI portmap plugin (Multiple Advisories)

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
04/02/2019
Created
02/09/2021
Added
02/08/2021
Modified
12/15/2023

Description

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.

Solution(s)

  • redhat-upgrade-buildah
  • redhat-upgrade-buildah-debuginfo
  • redhat-upgrade-buildah-debugsource
  • redhat-upgrade-buildah-tests
  • redhat-upgrade-buildah-tests-debuginfo
  • redhat-upgrade-cockpit-podman
  • redhat-upgrade-container-selinux
  • redhat-upgrade-containernetworking-plugins
  • redhat-upgrade-containernetworking-plugins-debuginfo
  • redhat-upgrade-containernetworking-plugins-debugsource
  • redhat-upgrade-containers-common
  • redhat-upgrade-fuse-overlayfs
  • redhat-upgrade-fuse-overlayfs-debuginfo
  • redhat-upgrade-fuse-overlayfs-debugsource
  • redhat-upgrade-oci-systemd-hook
  • redhat-upgrade-oci-systemd-hook-debuginfo
  • redhat-upgrade-oci-systemd-hook-debugsource
  • redhat-upgrade-oci-umount
  • redhat-upgrade-oci-umount-debuginfo
  • redhat-upgrade-oci-umount-debugsource
  • redhat-upgrade-podman
  • redhat-upgrade-podman-debuginfo
  • redhat-upgrade-podman-debugsource
  • redhat-upgrade-podman-docker
  • redhat-upgrade-podman-manpages
  • redhat-upgrade-podman-remote
  • redhat-upgrade-podman-remote-debuginfo
  • redhat-upgrade-podman-tests
  • redhat-upgrade-python-podman-api
  • redhat-upgrade-runc
  • redhat-upgrade-runc-debuginfo
  • redhat-upgrade-runc-debugsource
  • redhat-upgrade-skopeo
  • redhat-upgrade-skopeo-debuginfo
  • redhat-upgrade-skopeo-debugsource
  • redhat-upgrade-skopeo-tests
  • redhat-upgrade-slirp4netns
  • redhat-upgrade-slirp4netns-debuginfo
  • redhat-upgrade-slirp4netns-debugsource
  • redhat-upgrade-toolbox

References

  • CVE-2019-9946
  • RHBA-2019:0862
  • RHSA-2019:3403

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