CVEvulnerability

CVE-2019-9946

7.5 HIGH Published 2019-04-02 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2019-04-02
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
7.5 HIGH — CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CVSS 2.0 ([email protected])
5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
Weaknesses
CWE-670

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.

Affected configurations

• cncf portmap (< 0.7.5) • kubernetes kubernetes (< 1.11.9) • kubernetes kubernetes (>= 1.12.0 < 1.12.7) • kubernetes kubernetes (>= 1.13.0 < 1.13.5) • kubernetes kubernetes 1.13.6 • kubernetes kubernetes 1.14.0 • netapp cloud insights

Related

Weakness · CWE (1)

  • CWE-670 Always-Incorrect Control Flow Implementation weakness

References