The Kubernetes conf files must be owned by root.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-242446	CNTR-K8-003130	SV-242446r712694_rule		Medium

Description
The Kubernetes conf files contain the arguments and settings for the Master Node services. These services are controller 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 this file.

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

Details

Check Text ( C-45721r712692_chk )
Review the Kubernetes conf files by using the command: stat -c %U:%G /etc/kubernetes/admin.conf | grep -v root:root stat -c %U:%G /etc/kubernetes/scheduler.conf | grep -v root:root stat -c %U:%G /etc/kubernetes/controller-manager.conf | grep -v root:root If the command returns any non root:root file permissions, this is a finding.

Fix Text (F-45679r712693_fix)
Change the ownership of the conf files to root: root by executing the command: chown root:root /etc/kubernetes/admin.conf chown root:root /etc/kubernetes/scheduler.conf chown root:root /etc/kubernetes/controller-manager.conf