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Profile applicability: Level 1 - Master Node
Ensure that the admin.conf (and super-admin.conf file, where it exists) file ownership is set to root:root.
As part of initial cluster setup, default kubeconfig files are created to be used by the administrator of the cluster. These files contain private keys and certificates which allow for privileged access to the cluster. You should set their file ownership to maintain the integrity and confidentiality of the file. The file(s) should be owned by root:root.
Note
Note
By default, admin.conf and super-admin.conf file ownership is set to root:root.

Audit

Run the below command (based on the file location on your system) on the Control Plane node.
stat -c %U:%G /etc/kubernetes/admin.conf
On Kubernetes version 1.29 and higher run the following command as well.
stat -c %a /etc/kubernetes/super-admin.conf
Verify that the ownership is set to root:root.

Remediation

Run the below command (based on the file location on your system) on the Control Plane node.
chown root:root /etc/kubernetes/admin.conf
On Kubernetes 1.29+ the super-admin.conf file should also be modified, if present.
chown root:root /etc/kubernetes/super-admin.conf