Title

The Kubernetes KubeletConfiguration 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 Kubernetes Control Plane and Worker nodes, run the command: ps -ef | grep kubelet Check the config file (path identified by: --config): Change to the directory identified by --config (example /etc/sysconfig/) 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 Control Plane and Worker nodes, change to the --config 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-242406r918168_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.