How do I install the Cis K8S V200 4.1.8 skill?

Run npx skillmds@latest add cyberstrikeus/cis-k8s-v200-4-1-8 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Cis K8S V200 4.1.8 safe to use?

SkillMD's automated safety review verdict for this skill is PASS. Independent scanners report: SkillSpector: PASS, Skill Scanner: PASS. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Cis K8S V200 4.1.8?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Cis K8S V200 4.1.8 free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Cis K8S V200 4.1.8?

cyberstrikeus (@cyberstrikeus) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Cis K8S V200 4.1.8 by cyberstrikeus

Name: Cis K8S V200 4.1.8
Author: cyberstrikeus

File contents

4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual)

Profile Applicability

Level 1 - Worker Node

Description

Ensure that the certificate authorities file ownership is set to root:root.

Rationale

The certificate authorities file controls the authorities used to validate API requests. You should set its file ownership to maintain the integrity of the file. The file should be owned by root:root.

Impact

None

Audit

Run the following command:

ps -ef | grep kubelet

Find the file specified by the --client-ca-file argument.

Run the following command:

stat -c %U:%G <filename>

Verify that the ownership is set to root:root.

Remediation

Run the following command to modify the ownership of the --client-ca-file.

chown root:root <filename>

Default Value

By default no --client-ca-file is specified.

References

https://kubernetes.io/docs/admin/authentication/#x509-client-certs

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts - Restrict administrator privileges to dedicated administrator accounts on enterprise assets. Conduct general computing activities, such as internet browsing, email, and productivity suite use, from the user's primary, non-privileged account.	*	*	*
v7	4 Controlled Use of Administrative Privileges - Controlled Use of Administrative Privileges

---name: cis-k8s-v200-4-1-8description: Ensure that the client certificate authorities file ownership is set to root:root (Manual)---# 4.1.8 Ensure that the client certificate authorities file ownership is set to root:root (Manual)## Profile Applicability- Level 1 - Worker Node## DescriptionEnsure that the certificate authorities file ownership is set to `root:root`.## RationaleThe certificate authorities file controls the authorities used to validate API requests. You should set its file ownership to maintain the integrity of the file. The file should be owned by `root:root`.## ImpactNone## AuditRun the following command:```bashps -ef | grep kubelet```Find the file specified by the `--client-ca-file` argument.Run the following command:```bashstat -c %U:%G <filename>```Verify that the ownership is set to `root:root`.## RemediationRun the following command to modify the ownership of the `--client-ca-file`.```bashchown root:root <filename>```## Default ValueBy default no `--client-ca-file` is specified.## References1. https://kubernetes.io/docs/admin/authentication/#x509-client-certs## CIS Controls| Controls Version | Control | IG 1 | IG 2 | IG 3 || ---------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---- | ---- | ---- || v8 | 5.4 Restrict Administrator Privileges to Dedicated Administrator Accounts - Restrict administrator privileges to dedicated administrator accounts on enterprise assets. Conduct general computing activities, such as internet browsing, email, and productivity suite use, from the user's primary, non-privileged account. | \* | \* | \* || v7 | 4 Controlled Use of Administrative Privileges - Controlled Use of Administrative Privileges | | | |

Frequently asked questions

Cis K8S V200 4.1.8