The Kubernetes kubelet config must have file permissions set to 644 or more restrictive.

STIG ID: CNTR-K8-003230  |  SRG: SRG-APP-000516-CTR-001330 |  Severity: medium |  CCI: CCI-000366 |  Vulnerability Id: V-242456

Vulnerability Discussion

The Kubernetes kubelet agent registers nodes with the API server and performs health checks to containers within pods. If this file can be modified, the information system would be unaware of pod or container degradation.

Check

Review the permissions of the Kubernetes config.yaml by using the command:

stat -c %a /var/lib/kubelet/config.yaml

If any of the files are have permissions more permissive than "644", this is a finding.

Fix

Change the permissions of the config.yaml to "644" by executing the command:

chmod 644 /var/lib/kubelet/config.yaml
This website is not created by, run, approved, or endorsed by the U.S. Department of Defense. Use at your own risk. This website is created by open-source software.