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V-242454

CAT II (Medium)

The Kubernetes kubeadm.conf must be owned by root.

Rule ID

SV-242454r961863_rule

STIG

Kubernetes Security Technical Implementation Guide

Version

V2R6

CCIs

CCI-000366

Discussion

The Kubernetes kubeeadm.conf contains sensitive information regarding the cluster nodes configuration. If this file can be modified, the Kubernetes Platform Plane would be degraded or compromised for malicious intent. Many of the security settings within the document are implemented through this file.

Check Content

Review the Kubeadm.conf file :

Get the path for Kubeadm.conf by running: 
sytstemctl status kubelet

Note the configuration file installed by the kubeadm is written to 
(Default Location: /etc/systemd/system/kubelet.service.d/10-kubeadm.conf)
stat -c %U:%G <kubeadm.conf path> | grep -v root:root

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

Fix Text

Change the ownership of the kubeadm.conf to root: root by executing the command:

chown root:root <kubeadm.conf path>