The Kubernetes Kubelet certificate authority must be owned by root.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-242450	CNTR-K8-003170	SV-242450r864022_rule		Medium

Description
The Kubernetes kube proxy kubeconfig contain the argument and setting for the Control Planes. These settings contain network rules for restricting network communication between pods, clusters, and networks. If these files can be changed, data traversing between the Kubernetes Control Panel components would be compromised. Many of the security settings within the document are implemented through this file.

Description

The Kubernetes kube proxy kubeconfig contain the argument and setting for the Control Planes. These settings contain network rules for restricting network communication between pods, clusters, and networks. If these files can be changed, data traversing between the Kubernetes Control Panel components would be compromised. Many of the security settings within the document are implemented through this file.

STIG	Date
Kubernetes Security Technical Implementation Guide	2022-09-13

Details

Check Text ( C-45725r863917_chk )
Change to the /etc/sysconfig/ directory on the Kubernetes Control Plane. Review the ownership of the Kubernetes client-ca-file by using the command: more kubelet --client-ca-file argument Note certificate location Review the ownership of the Kubernetes client-ca-file by using the command: stat -c %U:%G \| grep -v root:root If the command returns any non root:root file permissions, this is a finding.

Check Text ( C-45725r863917_chk )

Change to the /etc/sysconfig/ directory on the Kubernetes Control Plane.
Review the ownership of the Kubernetes client-ca-file by using the command:
more kubelet
--client-ca-file argument
Note certificate location

Review the ownership of the Kubernetes client-ca-file by using the command:
stat -c %U:%G | grep -v root:root

If the command returns any non root:root file permissions, this is a finding.

Fix Text (F-45683r712705_fix)
Change the permissions of the Kube Proxy to "root" by executing the command: chown root:root .