CVE-2019-9946 – kubernetes: Incorrect rule injection in CNI portmap plugin

https://notcve.org/view.php?id=CVE-2019-9946

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. La interfaz de red del contenedor (CNI) de Cloud Native Computing Foundation (CNCF), en su versión 0.7.4, tiene una configuración incorrecta en el firewall de red que afecta a Kubernetes. • https://access.redhat.com/errata/RHBA-2019:0862 https://github.com/containernetworking/plugins/pull/269#issuecomment-477683272 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCN66VYB3XS76SYH567SO7N3I254JOCT https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SGOOWAELGH3F7OXRBPH3HCNZELNLXYTW https://security.netapp.com/advisory/ntap-20190416-0002 https://access.redhat.com/security/cve/CVE-2019-9946 https://bugzilla.redhat.com/show_bug.cgi?id& • CWE-670: Always-Incorrect Control Flow Implementation CWE-841: Improper Enforcement of Behavioral Workflow •