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.
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References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2019-04-02T17:22:52
Updated: 2024-08-04T22:10:08.508Z
Reserved: 2019-03-23T00:00:00
Link: CVE-2019-9946
Vulnrichment
No data.
NVD
Status : Modified
Published: 2019-04-02T18:30:26.583
Modified: 2024-11-21T04:52:38.937
Link: CVE-2019-9946
Redhat