Fix API Rate Limit Exhaustion in Cuba
In the Cuban digital landscape, where infrastructure is often resource-constrained and bandwidth is expensive, API Rate Limit Exhaustion is a critical vulnerability. Without throttling, a single actor can saturate an ETECSA-hosted backend, leading to complete service denial or cost spikes. We solve this by implementing middleware-level request tracking to drop malicious traffic before it hits the database.
The Vulnerable Pattern
const express = require('express'); const app = express();// VULNERABLE: No rate limiting implemented. // An attacker can script thousands of requests per second to exhaust memory/CPU. app.post(‘/api/v1/nauta-recharge’, (req, res) => { const { account, amount } = req.body; // Database logic here res.status(200).json({ status: ‘processing’ }); });
app.listen(80);
The Secure Implementation
The secure implementation utilizes the 'express-rate-limit' middleware to create a bottleneck for automated scripts. By setting a 'windowMs' and a 'max' request count, we ensure that the server only processes a manageable volume of traffic per unique IP address. In the context of Cuba, where many users may share public IPs (NAT), it is recommended to eventually upgrade this to token-based (JWT) limiting or use Redis to store states across multiple server instances to avoid blocking legitimate users while still neutralizing high-velocity DoS attacks.
const express = require('express'); const rateLimit = require('express-rate-limit'); const app = express();// SECURE: Implement a sliding window limiter const limiter = rateLimit({ windowMs: 15 * 60 * 1000, // 15 minutes max: 100, // Limit each IP to 100 requests per window standardHeaders: true, // Return rate limit info in the
RateLimit-*headers legacyHeaders: false, // Disable theX-RateLimit-*headers message: ‘Demasiadas solicitudes. Por favor, intente más tarde.’, });// Apply the rate limiting middleware to all API routes app.use(‘/api/’, limiter);
app.post(‘/api/v1/nauta-recharge’, (req, res) => { res.status(200).json({ status: ‘processing’ }); });
app.listen(80);
Your Cuba API
might be exposed to API Rate Limit Exhaustion
74% of Cuba apps fail this check. Hackers use automated scanners to find this specific flaw. Check your codebase before they do.
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