An AKS's Kubelet should use TLS authentication

azure.kubernetes
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Description

Disable anonymous requests to the Kubelet server. You should rely on authentication to authorize access and disallow anonymous requests to prevent unwanted actions in your cluster.

Remediation

Choose one of the following remediation methods. For both methods, a restart of the Kubelet service is required.

Kubelet config file

  1. Add the following JSON to the /etc/kubernetes/kubelet/kubelet-config.json file.
"authentication": { "x509": {"clientCAFile": "<path/to/client-ca-file>" }}"

Executable arguments

  1. Edit the kubelet service file on each worker node and ensure the following parameters are part of the KUBELET_ARGS variable string.
--client-ca-file=<path/to/client-ca-file>