# Allocation of Resources Without Limits or Throttling (CWE-770)

The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated.

**Stack:** Python

- Prevalence: 高 频繁被利用
- Impact: 中 建议审查
- Prevention: 已记录 3 个修复示例

**OWASP:** Security Misconfiguration (A05:2021-Security Misconfiguration) - #5

## Description

Without limits on resource allocation, an attacker can consume all available resources, causing denial of service for legitimate users.

## Prevention

基于 1 条 Shoulder 检测规则的 Allocation Without Limits 预防策略。

### Python

Add rate limiting to authentication and expensive API endpoints

## Warning Signs

- [MEDIUM] API endpoint lacks rate limiting protection
- [MEDIUM] API endpoints without rate limiting

## Consequences

- 拒绝服务 (DoS):资源消耗
- 拒绝服务 (DoS):崩溃/退出/重启

## Mitigations

- 对所有资源分配实施速率限制
- 为资源池设置最大上限
- 监控资源使用情况并实施告警

## Detection

- Total rules: 3
- Languages: javascript, typescript, python

## Rules by Language

### Python (1 rules)

- **Missing API Rate Limiting** [MEDIUM]: Detects API endpoints without rate limiting. Unprotected endpoints are
vulnerable to brute force attacks, credential stuffing, and denial of service.
Always implement rate limiting on authentication, expensive operations, and
public APIs.
  - Remediation: Add rate limiting decorator to authentication and expensive endpoints.

```python
from flask_limiter import Limiter
from flask_limiter.util import get_remote_address

limiter = Limiter(app=app, key_func=get_remote_address)

@app.route('/api/login', methods=['POST'])
@limiter.limit("5 per minute")
def login():
    user = authenticate(request.json)
    return jsonify({'token': generate_token(user)})
```

Learn more: https://shoulder.dev/learn/python/cwe-770/missing-rate-limiting