cis-k8s-v1120-1-1-3

name	cis-k8s-v1120-1.1.3
description	Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated)
category	cis-k8s
version	1.12.0
author	cyberstrike-official
tags	["cis","kubernetes","control-plane","config-files","controller-manager","permissions","level1"]
cis_id	1.1.3
cis_benchmark	CIS Kubernetes Benchmark v1.12.0
tech_stack	["kubernetes"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

1.1.3 Ensure that the controller manager pod specification file permissions are set to 600 or more restrictive (Automated)

Profile Applicability

• Level 1 - Master Node

Description

Ensure that the controller manager pod specification file has permissions of 600 or more restrictive.

Rationale

The controller manager pod specification file controls various parameters that set the behavior of the Controller Manager on the master node. You should restrict its file permissions to maintain the integrity of the file. The file should be writable by only the administrators on the system.

Impact

None

Audit

Run the below command (based on the file location on your system) on the Control Plane node. For example,

stat -c %a /etc/kubernetes/manifests/kube-controller-manager.yaml

Verify that the permissions are 600 or more restrictive.

Remediation

Run the below command (based on the file location on your system) on the Control Plane node. For example,

chmod 600 /etc/kubernetes/manifests/kube-controller-manager.yaml

Default Value

By default, the kube-controller-manager.yaml file has permissions of 640.

References

1. https://kubernetes.io/docs/admin/kube-apiserver/

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	3.3 Configure Data Access Control Lists	*	*	*
v7	14.6 Protect Information through Access Control Lists	*	*	*