DescriptionCloud 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.
Overall state of this security issue: Revisit
This issue is currently rated as having moderate severity.
|National Vulnerability Database|
|National Vulnerability Database||SUSE|
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.
|CaaS Platform 1.0||kubernetes||Not affected|
|CaaS Platform 2.0||kubernetes||Not affected|
|CaaS Platform 3.0||kubernetes||Affected|
|OpenStack Cloud Magnum Orchestration 7.0||kubernetes||Not affected|
|SUSE Linux Enterprise Module for Public Cloud 12||kubernetes||Not affected|