cis-eks-v160-3-1-2

name	cis-eks-v160-3.1.2
description	Ensure that the kubelet kubeconfig file ownership is set to root:root (Automated)
category	cis-eks
version	1.6.0
author	cyberstrike-official
tags	["cis","eks","kubernetes","aws","worker-node","configuration-files","file-ownership"]
cis_id	3.1.2
cis_benchmark	CIS Amazon Elastic Kubernetes Service (EKS) Benchmark v1.6.0
tech_stack	["kubernetes","aws","eks"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

3.1.2 Ensure that the kubelet kubeconfig file ownership is set to root:root (Automated)

Profile Applicability

• Level 1

Description

If kubelet is running, ensure that the file ownership of its kubeconfig file is set to root:root.

Rationale

The kubeconfig file for kubelet controls various parameters for the kubelet service in the worker node. You should set its file ownership to maintain the integrity of the file. The file should be owned by root:root.

Audit Procedure

Method 1 - SSH to the worker nodes:

To check to see if the Kubelet Service is running:

sudo systemctl status kubelet

The output should return Active: active (running) since...

Run the following command on each node to find the appropriate kubeconfig file:

ps -ef | grep kubelet

The output of the above command should return something similar to --kubeconfig /var/lib/kubelet/kubeconfig which is the location of the kubeconfig file.

Run this command to obtain the kubeconfig file ownership:

stat -c %U:%G /var/lib/kubelet/kubeconfig

The output of the above command gives you the kubeconfig file's ownership. Verify that the ownership is set to root:root.

Method 2 - Create and Run a Privileged Pod:

You will need to run a pod that is privileged enough to access the host's file system. This can be achieved by deploying a pod that uses the hostPath volume to mount the node's file system into the pod.

apiVersion: v1
kind: Pod
metadata:
  name: file-check
spec:
  volumes:
    - name: host-root
      hostPath:
        path: /
        type: Directory
  containers:
      
       
       [, ]