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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-242456	CNTR-K8-003230	SV-242456r961863_rule		Medium

Description

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.

STIG	Date
Kubernetes Security Technical Implementation Guide	2024-08-22

Details

Check Text (C-45731r712722_chk)

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 Text (F-45689r821617_fix)

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

chmod 644 /var/lib/kubelet/config.yaml