The --kubelet-certificate-authority argument is not set appropriately misconfiguration detected in c

Rule Details

Cortex AppSec Rule ID	APPSEC_K8S_73
Category - Subcategory	Kubernetes - Native Security Controls
Provider	OTHER
Severity	HIGH
Framework	Helm, Kubernetes, Kustomize

Impact

Verify kubelet's certificate before establishing connection.The connections from the apiserver to the kubelet are used for fetching logs for pods, attaching (through kubectl) to running pods, and using the kubelet's port-forwarding functionality. These connections terminate at the kubelet's HTTPS endpoint. By default, the apiserver does not verify the kubelet's serving certificate, which makes the connection subject to man-in-the-middle attacks, and unsafe to run over untrusted and/or public networks.

How to Fix

Kind: Pod [source,go]

{ "apiVersion: v1 kind: Pod metadata: creationTimestamp: null labels: component: kube-apiserver tier: control-plane name: kube-apiserver namespace: kube-system spec: containers:

• command:

• • kube-apiserver

• • --kubelet-certificate-authority=ca.file image: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0 ...", }

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