cis-aks-v180-3-1-4

name	cis-aks-v180-3.1.4
description	Ensure that the azure.json file ownership is set to root:root (Automated)
category	cis-aks
version	1.8.0
author	cyberstrike-official
tags	["cis","aks","kubernetes","azure","worker-node","file-ownership","azure-json"]
cis_id	3.1.4
cis_benchmark	CIS Azure Kubernetes Service (AKS) Benchmark v1.8.0
tech_stack	["kubernetes","azure","aks"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

3.1.4 Ensure that the azure.json file ownership is set to root:root (Automated)

Profile Applicability

• Level 1

Description

The azure.json file in an Azure Kubernetes Service (AKS) cluster is a configuration file used by the Kubernetes cloud provider integration for Azure. This file contains essential details that allow the Kubernetes cluster to interact with Azure resources effectively. It's part of the Azure Cloud Provider configuration, enabling Kubernetes components to communicate with Azure services for features like load balancers, storage, and networking.

Ensure that the file is owned by root:root.

Rationale

The azure.json file in AKS structure typically includes:

• Tenant ID: The Azure Tenant ID where the AKS cluster resides.
• Subscription ID: The Azure Subscription ID used for billing and resource management.
• AAD Client ID: The Azure Active Directory (AAD) application client ID used by the Kubernetes cloud provider to interact with Azure resources.
• AAD Client Secret: The secret for the AAD application.
• Resource Group: The name of the resource group where the AKS cluster resources are located.
• Location: The Azure region where the AKS cluster is deployed.
• VM Type: Specifies the type of VMs used by the cluster (e.g., standard VMs or Virtual Machine Scale Sets).
• Subnet Name, Security Group Name, Vnet Name, and Vnet Resource Group: Networking details for the cluster.
• Route Table Name: The name of the route table for the cluster.
• Storage Account Type: The default type of storage account to use for Kubernetes persistent volumes.

Impact

None

Audit Procedure

Method 1

First, SSH to the relevant worker node.

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 Kubelet config file:

ps -ef | grep kubelet

The output of the above command should return something similar to --config /etc/kubernetes/azure.json which is the location of the Kubelet config file.

Run the following command:

stat -c %U:%G /etc/kubernetes/azure.json

The output of the above command is the Kubelet config file's ownership. Verify that the ownership is set to .