The Kubernetes KubeletConfiguration file must be owned by root.

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The Kubernetes KubeletConfiguration file must be owned by root.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-242406	CNTR-K8-000880	SV-242406r918168_rule		Medium

Description
The kubelet configuration file contains the runtime configuration of the kubelet service. If an attacker can gain access to this file, changes can be made to open vulnerabilities and bypass user authorizations inherent within Kubernetes with RBAC implemented.

STIG	Date
Kubernetes Security Technical Implementation Guide	2023-06-20

Details

Check Text ( C-45681r863815_chk )
On the Kubernetes Control Plane and Worker nodes, run the command: ps -ef \| grep kubelet Check the config file (path identified by: --config): Change to the directory identified by --config (example /etc/sysconfig/) run the command: ls -l kubelet Each kubelet configuration file must be owned by root:root. If any manifest file is not owned by root:root, this is a finding.

Fix Text (F-45639r863816_fix)
On the Control Plane and Worker nodes, change to the --config directory. Run the command: chown root:root kubelet To verify the change took place, run the command: ls -l kubelet The kubelet file should now be owned by root:root.