Cis Ocp V190 4.1.2

---
name: cis-ocp-v190-4.1.2
description: "Ensure that the kubelet service file ownership is set to root:root (Automated)"
category: cis-openshift
version: "1.9.0"
author: cyberstrike-official
tags: [cis, openshift, kubernetes, redhat, worker-nodes, worker-node-config-files]
cis_id: "4.1.2"
cis_benchmark: "CIS Red Hat OpenShift Container Platform Benchmark v1.9.0"
tech_stack: [kubernetes, openshift, redhat]
cwe_ids: []
chains_with: []
prerequisites: []
severity_boost: {}
---

# CIS Red Hat OpenShift Container Platform Benchmark v1.9.0 - Control 4.1.2

## Profile Applicability

- **Level:** 1

## Description

Ensure that the kubelet service file ownership is set to `root:root`.

## Rationale

The kubelet service file controls various parameters that set the behavior of 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`.

## Impact

None

## Audit Procedure

Run the following command to list the user and group for the `kubelet.service` file on each node:

```bash
for node in $(oc get nodes -o jsonpath='{.items[*].metadata.name}')
do
oc debug node/${node} -- chroot /host stat -c %U:%G /etc/systemd/system/kubelet.service
done
```

OR

```bash
for node in $(oc get nodes -o jsonpath='{.items[*].metadata.name}')
do
oc debug node/${node} -- chroot /host stat -c %U:%G /host/usr/lib/systemd/system/kubelet.service
done
```

Verify that the ownership is set to `root:root`.

## Remediation

None.

## Default Value

By default, OpenShift sets the default user and group for the `kubelet.service` file to `root:root`.

## References

1. https://docs.openshift.com/container-platform/4.5/architecture/control-plane.html#understanding-machine-config-operator_control-plane
2. https://docs.openshift.com/container-platform/4.5/scalability_and_performance/recommended-host-practices.html#create-a-kubeletconfig-crd-to-edit-kubelet-parameters_
3. https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/
4. https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/#44-joining-your-nodes
5. https://kubernetes.io/docs/reference/setup-tools/kubeadm/#kubelet-drop-in

## CIS Controls

| Controls Version | Control                                                                   | IG 1 | IG 2 | IG 3 |
| ---------------- | ------------------------------------------------------------------------- | ---- | ---- | ---- |
| v8               | 5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts | \*   | \*   | \*   |
| v7               | 4.3 Ensure the Use of Dedicated Administrative Accounts                   | \*   | \*   | \*   |

## MITRE ATT&CK Mappings

| Techniques / Sub-techniques | Tactics        | Mitigations |
| --------------------------- | -------------- | ----------- |
| T1083, T1222                | TA0005, TA0007 | M1026       |

## Profile

**Level 1** (Automated)