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CVE-2019-9946

Disclosure Date: April 02, 2019
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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.

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CVSS V3 Severity and Metrics
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General Information

Vendors

  • cncf,
  • kubernetes,
  • netapp

Products

  • cloud insights -,
  • kubernetes,
  • kubernetes 1.13.6,
  • kubernetes 1.14.0,
  • portmap
Technical Analysis