CVE-2019-9946

CVE Details

Release Date:

2019-04-02

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.

See more information about CVE-2019-9946 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	7.5	Base Metrics:	AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Access Vector:	Network	Attack Complexity:	Low
Privileges Required:	None	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	High	Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 7 (kubeadm-ha-setup)	ELSA-2019-4593	2019-04-13
Oracle Linux version 7 (kubeadm-upgrade)	ELSA-2019-4593	2019-04-13
Oracle Linux version 7 (kubernetes)	ELSA-2019-4593	2019-04-13
Oracle Linux version 7 (kubernetes-cni)	ELSA-2019-4593	2019-04-13
Oracle Linux version 7 (kubernetes-cni-plugins)	ELSA-2019-4593	2019-04-13

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team