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.
History

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cve-icon MITRE Information

Status: PUBLISHED

Assigner: mitre

Published: 2019-04-02T17:22:52

Updated: 2019-06-15T02:06:04

Reserved: 2019-03-23T00:00:00


Link: CVE-2019-9946

JSON object: View

cve-icon NVD Information

Status : Modified

Published: 2019-04-02T18:30:26.583

Modified: 2023-11-07T03:13:49.317


Link: CVE-2019-9946

JSON object: View

cve-icon Redhat Information

No data.

CWE