Security Testing Strategy

Security Testing Strategy

This comprehensive security testing strategy covers all critical security domains for Puppeteer MCP, including specific test scenarios, automated testing approaches, and continuous monitoring strategies.

Security-First Approach

Puppeteer MCP follows a security-first development approach where every feature must pass security validation before release.

Testing Domains Overview

Our security testing framework covers these critical areas:

1. Authentication & Authorization - JWT validation, API key security, session management
2. Input Validation & Injection - SQL injection, XSS, command injection prevention
3. Network Security - TLS configuration, certificate validation, secure communications
4. Data Protection - Encryption, data handling, privacy compliance
5. Browser Security - Sandboxing, CSP implementation, secure automation
6. Compliance & Audit - Regulatory compliance, security audit procedures

1. Authentication & Authorization Testing

JWT Token Security

Our JWT implementation includes comprehensive validation testing:

// Security test example - JWT validation
describe('JWT Security Tests', () => {
  test('should reject expired tokens', async () => {
    const expiredToken = generateToken({ exp: Date.now() / 1000 - 3600 });
    const response = await request(app)
      .get('/api/sessions')
      .set('Authorization', `Bearer ${expiredToken}`);
    expect(response.status).toBe(401);
    expect(response.body.error).toContain('Token expired');
  });

  test('should prevent algorithm confusion attacks', async () => {
    const rsaToken = generateToken({ alg: 'RS256' }, hmacSecret);
    const response = await request(app)
      .get('/api/sessions')
      .set('Authorization', `Bearer ${rsaToken}`);
    expect(response.status).toBe(401);
  });
});

Key Attack Vectors Tested

• Token replay attacks and expiration enforcement
• Algorithm confusion and key confusion attacks
• Clock skew exploitation and timing attacks
• Invalid signature detection and handling

API Key Security

API key validation includes timing attack prevention:

// Constant-time API key validation
test('should prevent timing attacks on API key validation', async () => {
  const timings = [];
  for (let i = 0; i < 1000; i++) {
    const start = process.hrtime.bigint();
    await auth.validateApiKey(i % 2 === 0 ? validKey : invalidKey);
    const end = process.hrtime.bigint();
    timings.push(Number(end - start));
  }

  const variance = calculateVariance(timings);
  expect(variance).toBeLessThan(threshold);
});

2. Input Validation & Injection Testing

Injection Attack Prevention

Comprehensive testing against injection attacks:

// SQL Injection prevention testing
test('should prevent SQL injection in session queries', async () => {
  const maliciousInput = "'; DROP TABLE sessions; --";
  const response = await request(app)
    .post('/api/sessions')
    .send({ userId: maliciousInput });

  expect(response.status).toBe(400);
  expect(response.body.error).toContain('Invalid input');
});

// Command injection prevention
test('should prevent command injection in browser automation', async () => {
  const maliciousCommand = "$(rm -rf /)";
  const response = await request(app)
    .post('/api/browser/navigate')
    .send({ url: maliciousCommand });

  expect(response.status).toBe(400);
});

Data Sanitization

All inputs undergo strict validation and sanitization:

• URL validation with allowlist patterns
• Parameter sanitization using Zod schemas
• File path validation to prevent directory traversal
• Header injection prevention in HTTP responses

3. Network Security Testing

TLS Configuration Validation

Ensures secure communication protocols:

// TLS security testing
describe('TLS Security Tests', () => {
  test('should enforce minimum TLS version 1.2', async () => {
    const client = tls.connect({
      host: 'localhost',
      port: 3000,
      secureProtocol: 'TLSv1_method' // Force TLS 1.0
    });

    client.on('error', (error) => {
      expect(error.message).toContain('unsupported protocol');
    });
  });

  test('should validate certificate chain', async () => {
    const response = await https.get(serverUrl, {
      rejectUnauthorized: true
    });
    expect(response.socket.authorized).toBe(true);
  });
});

Security Headers

Validates proper security header implementation:

• Strict-Transport-Security for HTTPS enforcement
• Content-Security-Policy for XSS prevention
• X-Frame-Options for clickjacking protection
• X-Content-Type-Options for MIME sniffing prevention

4. Browser Security Testing

Sandboxing and Isolation

Browser automation includes security sandboxing:

// Browser security testing
test('should isolate browser contexts', async () => {
  const context1 = await browser.createIncognitoContext();
  const context2 = await browser.createIncognitoContext();

  await context1.newPage().goto('https://example.com');
  await context1.evaluate(() => {
    localStorage.setItem('test', 'context1');
  });

  const storage = await context2.evaluate(() => {
    return localStorage.getItem('test');
  });

  expect(storage).toBeNull(); // No cross-context contamination
});

test('should enforce content security policy', async () => {
  const page = await browser.newPage();
  const violations = [];

  page.on('response', response => {
    const csp = response.headers()['content-security-policy'];
    expect(csp).toBeTruthy();
  });
});

5. Automated Security Testing

CI/CD Integration

Security tests run automatically in our CI/CD pipeline:

# GitHub Actions security testing
- name: Security Tests
  run: |
    npm run test:security
    npm run security:scan
    npm run security:audit

Security Scanning Tools

Integrated security scanning includes:

• SAST (Static Analysis) with ESLint security rules
• Dependency Scanning with npm audit and Snyk
• Container Scanning for Docker image vulnerabilities
• Dynamic Testing with automated penetration testing

6. Compliance Testing

NIST Compliance

All security controls are tagged with NIST references:

/**
 * Session creation with NIST compliance
 * @nist ac-10 "Concurrent session control"
 * @nist ac-12 "Session termination"
 */
async function createSession(userId: string) {
  // Implementation with compliance validation
}

Audit Logging

Security-relevant events are logged for compliance:

• Authentication attempts (success/failure)
• Authorization decisions
• Data access and modifications
• Security policy violations

7. Penetration Testing

Automated Penetration Testing

Regular automated testing includes:

// Automated security probing
describe('Penetration Tests', () => {
  test('should resist brute force attacks', async () => {
    const attempts = [];
    for (let i = 0; i < 100; i++) {
      const start = Date.now();
      const response = await request(app)
        .post('/api/auth')
        .send({ username: 'admin', password: 'wrong' });
      attempts.push({ time: Date.now() - start, status: response.status });
    }

    // Should implement rate limiting and backoff
    const finalAttempt = attempts[attempts.length - 1];
    expect(finalAttempt.time).toBeGreaterThan(5000); // 5 second delay
  });
});

8. Security Monitoring

Real-time Security Monitoring

Continuous monitoring includes:

• Intrusion Detection monitoring suspicious patterns
• Rate Limiting tracking and enforcement
• Anomaly Detection identifying unusual behavior
• Security Metrics tracking security KPIs

Security Incident Response

Automated incident response procedures:

1. Detection - Automated threat detection
2. Assessment - Impact analysis and classification
3. Containment - Automated isolation procedures
4. Recovery - Service restoration protocols
5. Lessons Learned - Post-incident analysis

Implementation Checklist

Phase 1: Core Security (High Priority)

• Authentication & authorization testing
• Input validation and sanitization
• Basic security headers implementation
• TLS configuration validation

Phase 2: Advanced Security (Medium Priority)

• Browser security and sandboxing
• Advanced injection testing
• Security monitoring setup
• Penetration testing framework

Phase 3: Compliance & Monitoring (Ongoing)

• NIST compliance validation
• Audit logging implementation
• Continuous security monitoring
• Regular security assessments

Tools and Resources

Security Testing Tools

• Jest for automated security test execution
• OWASP ZAP for dynamic security testing
• Burp Suite for manual penetration testing
• Snyk for dependency vulnerability scanning

Related Documentation

• Architecture Security - Security architecture overview
• API Reference - Security-related API documentation
• Operations Guide - Security operations procedures

Getting Help

For security-related questions:

• Review Security Architecture for design context
• Check Operations for incident response
• Report security issues privately via email (not GitHub issues)

Security Disclosure

For security vulnerabilities, please follow responsible disclosure practices. Contact the security team directly rather than opening public issues.