# Improper Access Control (CWE-284)

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

**Stack:** Kubernetes

- Prevalence: 高 频繁被利用
- Impact: 高 3 条严重级别为高的规则
- Prevention: 已记录 4 个修复示例

**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

基于 1 条 Shoulder 检测规则的 Improper Access Control 预防策略。

### 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

- 读取应用程序数据
- 修改应用程序数据
- 执行未授权代码
- 获取权限

## Mitigations

- 对所有资源实施适当的访问控制检查
- 采用最小权限原则
- 在服务器端而不仅是 UI 层强制执行访问控制

## 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