Information
Ensure that Kubernetes PKI key files have permissions of 600.
Rationale:
Kubernetes makes use of a number of key files as part of the operation of its components. The permissions on these files should be set to 600 to protect their integrity and confidentiality.
Solution
Run the below command (based on the file location on your system) on the master node. For example,
chmod -R 600 /etc/kubernetes/pki/*.key
Impact:
None
Default Value:
By default, the keys used by Kubernetes are set to have permissions of 600
References:
https://kubernetes.io/docs/admin/kube-apiserver/