# Cis Aks V180 4.1.10

> Cis Aks V180 4.1.10 is an Agent Skill for devops & security published in the CyberStrikeus/CyberStrike repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.

Minimize access to the approval sub-resource of certificatesigningrequests objects (Manual)

- Skill name: `cis-aks-v180-4.1.10`
- Category: [DevOps & Security](https://www.openparable.com/skill/devops-security/1)
- Source: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Server_Software/Kubernetes/CIS_Azure_Kubernetes_Service_AKS_Benchmark_v1.8.0/cis-aks-v180-4.1.10/SKILL.md
- Repository: CyberStrikeus/CyberStrike (1,211 GitHub stars when collected)

## SKILL.md

# 4.1.10 Minimize access to the approval sub-resource of certificatesigningrequests objects (Manual)

## Profile Applicability

- Level 1

## Description

Users with access to the update the `approval` sub-resource of `CertificateSigningRequests` objects can approve new client certificates for the Kubernetes API effectively allowing them to create new high-privileged user accounts.

This can allow for privilege escalation to full cluster administrator, depending on users configured in the cluster.

## Rationale

The ability to update certificate signing requests should be limited.

## Audit

Review the users who have access to update the `approval` sub-resource of `CertificateSigningRequests` objects in the Kubernetes API.

## Remediation

Where possible, remove access to the `approval` sub-resource of `CertificateSigningRequests` objects.

## References

1. [https://kubernetes.io/docs/concepts/security/rbac-good-practices/#csrs-and-certificate-issuing](https://kubernetes.io/docs/concepts/security/rbac-good-practices/#csrs-and-certificate-issuing)

## CIS Controls

| Controls Version | Control                                           | IG 1 | IG 2 | IG 3 |
| ---------------- | ------------------------------------------------- | ---- | ---- | ---- |
| v8               | 6.8 Define and Maintain Role-Based Access Control |      |      | x    |

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Source: https://www.openparable.com/skill/devops-security/cis-aks-v180-4-1-10 (OpenParable). Cite the canonical URL above.