This document provides a comprehensive security audit of the Connex application, covering all implemented features and potential vulnerabilities.

• ✅ JWT-based authentication with secure token handling
• ✅ Password hashing using bcrypt with appropriate cost factor
• ✅ Role-based access control (RBAC) ready
• ✅ Secure session management
• ✅ Token expiration and refresh mechanisms

• ✅ Request validation using struct tags and custom validation
• ✅ SQL injection protection through parameterized queries (sqlx)
• ✅ Input sanitization for user-provided data
• ✅ Content-Type validation for API endpoints

• ✅ Redis-based rate limiting with configurable limits
• ✅ Per-IP rate limiting for general endpoints
• ✅ Stricter rate limiting for authentication endpoints
• ✅ Rate limit headers in responses
• ✅ Graceful degradation when Redis is unavailable

• ✅ Configurable CORS policy with secure defaults
• ✅ Security headers middleware
• ✅ Content Security Policy (CSP) ready
• ✅ XSS protection headers

• ✅ Parameterized queries preventing SQL injection
• ✅ Connection pooling with limits
• ✅ Database connection encryption (SSL/TLS)
• ✅ Prepared statements usage

• ✅ Cache key sanitization using MD5 hashing
• ✅ Cache invalidation mechanisms
• ✅ No sensitive data in cache keys
• ✅ Cache bypass for authenticated endpoints

• ✅ Prometheus metrics with secure defaults
• ✅ OpenTelemetry tracing with configurable sampling
• ✅ Structured logging without sensitive data exposure
• ✅ Health check endpoints for monitoring

• ✅ Centralized error handling
• ✅ No sensitive information in error responses
• ✅ Consistent error response format
• ✅ Proper HTTP status codes

Issue: Metrics endpoint /metrics was publicly accessible Fix: Added authentication middleware for metrics endpoint in production Status: ✅ Fixed

Issue: OpenTelemetry traces could contain sensitive data Fix: Implemented trace sampling and sensitive data filtering Status: ✅ Fixed

Issue: Rate limiting could be bypassed with certain headers Fix: Improved IP detection logic considering proxies Status: ✅ Fixed

Issue: Cache keys could be manipulated Fix: Implemented MD5 hashing for cache keys Status: ✅ Fixed

• Use HTTPS/TLS in production
• Implement proper secrets management (HashiCorp Vault, AWS Secrets Manager)
• Enable security headers (HSTS, CSP, etc.)
• Configure proper CORS origins
• Use strong JWT secrets (32+ characters)
• Enable database SSL/TLS

• Set up security monitoring for failed login attempts
• Monitor for unusual traffic patterns
• Alert on rate limit violations
• Monitor for SQL injection attempts
• Set up log aggregation and analysis

• Implement API key authentication for external services
• Add request/response logging for audit trails
• Implement account lockout after failed attempts
• Add two-factor authentication (2FA)
• Implement password complexity requirements

• Use container security scanning
• Implement network segmentation
• Regular security updates and patches
• Backup encryption
• Disaster recovery procedures

• Unit tests for security functions
• Integration tests for authentication flows
• Penetration testing scripts
• Security linting (gosec, nancy)

• Authentication bypass attempts
• SQL injection testing
• XSS payload testing
• Rate limiting bypass attempts
• Authorization testing

• Data minimization
• Right to be forgotten
• Data portability
• Privacy by design

• Access controls
• Audit logging
• Change management
• Incident response

1. Detection: Automated monitoring and alerting
2. Assessment: Impact analysis and severity classification
3. Containment: Immediate response to limit damage
4. Eradication: Root cause analysis and fix
5. Recovery: System restoration and verification
6. Lessons Learned: Documentation and process improvement

• Security Team: security@yourcompany.com
• Emergency Contact: +1-XXX-XXX-XXXX

This document should be updated:

• After each security audit
• When new features are added
• After security incidents
• Quarterly review

• OWASP Top 10
• Go Security Best Practices
• JWT Security Best Practices
• Prometheus Security