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Profile applicability: Level 1 - Master Node
Ensure that the controller manager pod specification file has permissions of 600 or more restrictive.
The controller manager pod specification file controls various parameters that set the behavior of the Controller Manager on the master node. You should restrict its file permissions to maintain the integrity of the file. The file should be writable by only the administrators on the system.
Note
Note
By default, the kube-controller-manager.yaml file has permissions of 640.

Audit

  1. Run the below command (based on the file location on your system) on the Control Plane node.
    stat -c %a /etc/kubernetes/manifests/kube-controller-manager.yaml
  2. Verify that the permissions are 600 or more restrictive.

Remediation

Run the below command (based on the file location on your system) on the Control Plane node.
chmod 600 /etc/kubernetes/manifests/kube-controller-manager.yaml