Title

The Kubernetes kubelet configuration file must be owned by root. (Cat II impact)

Discussion

The kubelet configuration file contains the runtime configuration of the kubelet service. If an attacker can gain access to this file, changes can be made to open vulnerabilities and bypass user authorizations inherent within Kubernetes with RBAC implemented.

Check Content

On the Master and worker nodes, change to the /etc/sysconfig directory. Run the command: ls -l kubelet Each kubelet configuration file must be owned by root:root. If any manifest file is not owned by root:root, this is a finding.

Fix Text

On the Master and Worker nodes, change to the /etc/sysconfig directory. Run the command: chown root:root kubelet To verify the change took place, run the command: ls -l kubelet The kubelet file should now be owned by root:root.

Additional Identifiers

Rule ID: SV-242406r712574_rule

Vulnerability ID: V-242406

Group Title: SRG-APP-000133-CTR-000300

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.