The Kubernetes API Server must have file permissions set to 644 or more restrictive.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-242458	CNTR-K8-003250	SV-242458r712730_rule		Medium

Description
The Kubernetes manifests are those files that contain the arguments and settings for the Master Node services. These services are etcd, the API Server, controller, proxy, and scheduler. If these files can be changed, the scheduler will be implementing the changes immediately. Many of the security settings within the document are implemented through these manifests.

STIG	Date
Kubernetes Security Technical Implementation Guide	2021-04-14

Details

Check Text ( C-45733r712728_chk )
Review the permissions of the Kubernetes Kubelet by using the command: stat -c %a /etc/kubernetes/manifests/* If any of the files are have permissions more permissive than "644", this is a finding.

Fix Text (F-45691r712729_fix)
Change the permissions of the manifest files to "root: root" by executing the command: chown root:root /etc/kubernetes/manifests/*