cis-ocp-v160-1-1-13

name	cis-ocp-v160-1.1.13
description	Ensure that the kubeconfig file permissions are set to 600 or more restrictive (Manual)
category	cis-openshift
version	1.6.0
author	cyberstrike-official
tags	["cis","openshift","kubernetes","redhat","control-plane","master-node-config-files","kubeconfig","admin-config","file-permissions"]
cis_id	1.1.13
cis_benchmark	CIS Red Hat OpenShift Container Platform Benchmark v1.6.0
tech_stack	["kubernetes","openshift","redhat"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

CIS Red Hat OpenShift Container Platform Benchmark v1.6.0 - Control 1.1.13

Profile Applicability

• Level: 1

Description

Ensure that the kubeconfig file has permissions of 600 or more restrictive.

Rationale

The administrator kubeconfig file defines various settings for the administration of the cluster. 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 Procedure

In OpenShift 4 the admin config file is stored in /etc/kubernetes/kubeconfig with permissions 600. Run the following command:

for i in $(oc get nodes  -o name)
do
  oc debug $i --  <<EOF
       chroot /host
       stat -c%a /etc/kubernetes/kubeconfig
EOF
done

Verify that the permissions are 600 or more restrictive.

Remediation

There is no remediation for updating the permissions of kubeconfig. The file is owned by an OpenShift operator and any changes to the file will result in a degraded cluster state. Please do not attempt to remediate the permissions of this file.

Default Value

By default, in OpenShift 4.14, the kubeconfig has permissions of 600.

In older versions of OpenShift, the kubeconfig has permissions of 644, and is not remediable. Please upgrade to OpenShift 4.14 when possible.

References

1. https://docs.openshift.com/container-platform/4.5/cli_reference/openshift_cli/administrator-cli-commands.html
2. https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3