# Improper Access Control (CWE-284)

The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

**Stack:** Kubernetes

- Prevalence: 높음 자주 악용됨
- Impact: 높음 3개의 높은 심각도 규칙
- Prevention: 문서화됨 4개의 수정 예시

**OWASP:** Broken Access Control (A01:2021-Broken Access Control) - #1

## Description

Access control involves determining which subjects can access which objects. When access control is implemented incorrectly, it can lead to unauthorized access to sensitive data or functionality.

## Prevention

1개의 Shoulder 탐지 규칙을 기반으로 한 Improper Access Control 예방 전략.

### Kubernetes

Define NetworkPolicy resources to restrict pod-to-pod traffic and enforce network segmentation

## Warning Signs

- [MEDIUM] Workload has no NetworkPolicy for network segmentation
- [MEDIUM] Kubernetes deployments without associated NetworkPolicy resources

## Consequences

- 애플리케이션 데이터 읽기
- 애플리케이션 데이터 수정
- 승인되지 않은 코드 실행
- 권한 획득

## Mitigations

- 모든 리소스에 대해 적절한 접근 제어 검사를 구현하세요
- 최소 권한 원칙을 사용하세요
- 접근 제어는 UI뿐 아니라 서버에서도 강제하세요

## Detection

- Total rules: 4
- Languages: go, javascript, typescript, kubernetes, yaml, python

## Rules by Language

### Kubernetes (1 rules)

- **Missing Network Policy** [MEDIUM]: Detects Kubernetes deployments without associated NetworkPolicy resources.
  - Remediation: Define a NetworkPolicy to control pod network access.

```yaml
kind: NetworkPolicy
spec:
  podSelector: {}
  policyTypes: [Ingress]
```

Learn more: https://shoulder.dev/learn/kubernetes/cwe-284/missing-network-policy

### Yaml (1 rules)

- **Missing Network Policy** [MEDIUM]: Detects Kubernetes deployments without associated NetworkPolicy resources.
  - Remediation: Define a NetworkPolicy to control pod network access.

```yaml
kind: NetworkPolicy
spec:
  podSelector: {}
  policyTypes: [Ingress]
```

Learn more: https://shoulder.dev/learn/kubernetes/cwe-284/missing-network-policy