vulnerability
Oracle Linux: CVE-2019-9946: ELSA-2019-4593: kubernetes kubeadm-upgrade kubeadm-ha-setup security update (IMPORTANT)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:P/A:N) | Mar 28, 2019 | Apr 14, 2019 | Dec 3, 2025 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
Mar 28, 2019
Added
Apr 14, 2019
Modified
Dec 3, 2025
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.
Solutions
oracle-linux-upgrade-kubeadmoracle-linux-upgrade-kubeadm-ha-setuporacle-linux-upgrade-kubeadm-upgradeoracle-linux-upgrade-kubectloracle-linux-upgrade-kubeletoracle-linux-upgrade-kubernetes-cnioracle-linux-upgrade-kubernetes-cni-plugins
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