Details
Ensure that the controller manager pod specification file has permissions of 644 or more restrictive.
Rationale:
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.
Impact:
None
Solution
Run the below command (based on the file location on your system) on the master node. For example,
chmod 644 /etc/kubernetes/manifests/kube-controller-manager.yaml
Default Value:
By default, the kube-controller-manager.yaml file has permissions of 640.
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Unix.