Initial commit - Church Music Database
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legacy-site/documentation/md-files/SECURITY_AUDIT.md
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Security audit results and recommendations for Church Music Database
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Date: December 15, 2025
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Audit Type: Full-stack security and code quality review
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## CRITICAL ISSUES FIXED
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### Backend (Python/Flask)
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✅ 1. Database Session Leaks - FIXED
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- Added try-finally blocks to all endpoints
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- Implemented proper session cleanup
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- Fixed get_db() function to prevent premature closure
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✅ 2. Input Validation - FIXED
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- Added length limits on all string inputs (title, artist, name: 500 chars)
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- Added file size validation (10MB max)
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- Added filename validation to prevent path traversal
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- Added query parameter length limits (500 chars)
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- Added ID validation for all endpoints
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✅ 3. SQL Injection Protection - ENHANCED
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- Already using SQLAlchemy ORM (parameterized queries)
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- Added input sanitization
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- Added validation on filter types in search
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✅ 4. Security Headers - ADDED
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- X-Content-Type-Options: nosniff
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- X-Frame-Options: DENY
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- X-XSS-Protection: 1; mode=block
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- Strict-Transport-Security (HSTS)
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- Server header removal
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✅ 5. Request Size Limits - ADDED
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- MAX_CONTENT_LENGTH: 16MB
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- File upload: 10MB limit
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- Prevents DoS attacks
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✅ 6. Session Security - ENHANCED
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- Secure cookie flags in production
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- HTTPOnly flag set
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- SameSite=Lax
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- Session timeout: 1 hour
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✅ 7. Environment Variables - VALIDATED
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- Added production checks for SECRET_KEY and POSTGRESQL_URI
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- Created .env.example template
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- Added warning for default passwords
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### Database (PostgreSQL)
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✅ 8. Indexes Added for Performance
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- idx_profile_name on profiles(name)
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- idx_song_title, idx_song_artist, idx_song_band on songs
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- idx_plan_date, idx_plan_profile on plans
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- Composite indexes on junction tables
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✅ 9. Unique Constraints Added
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- uq_plan_song (prevents duplicate songs in plans)
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- uq_profile_song (prevents duplicate profile-song associations)
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- uq_profile_song_key (one key per profile-song)
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✅ 10. Cascade Deletes Configured
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- ON DELETE CASCADE for ProfileSong, ProfileSongKey, PlanSong
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- ON DELETE SET NULL for Plan.profile_id
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- Prevents orphaned records
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✅ 11. Password Validation - ADDED
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- Checks for default password in production
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- Raises error if 'your_password' found in POSTGRESQL_URI
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### Frontend (React)
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✅ 12. Error Handling - IMPROVED
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- Better error logging in API settings parsing
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- Automatic corrupted settings cleanup
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- Graceful fallbacks throughout
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## REMAINING RECOMMENDATIONS
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### High Priority
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⚠️ 1. Authentication Enhancement
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- Current: Client-side password hash (easily bypassed)
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- Recommended: JWT tokens with backend authentication
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- Recommended: OAuth2 or SAML for enterprise
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⚠️ 2. Rate Limiting
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- Install flask-limiter: pip install flask-limiter
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- Add rate limits to prevent brute force attacks
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- Suggested: 100 requests per minute per IP
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⚠️ 3. HTTPS/TLS Configuration
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- Currently using HTTP
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- Production MUST use HTTPS
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- Configure reverse proxy (nginx) with Let's Encrypt certificates
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⚠️ 4. Content Security Policy (CSP)
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- Add CSP headers to prevent XSS attacks
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- Restrict script sources to same-origin
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### Medium Priority
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⚠️ 5. Code Organization
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- App.js is 7579 lines (too large)
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- Recommended: Split into smaller components
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- Implement proper component structure
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⚠️ 6. API Versioning
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- Add /api/v1/ prefix to all endpoints
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- Allows backward compatibility during updates
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⚠️ 7. Logging Enhancement
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- Implement structured logging (JSON format)
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- Add request ID tracking
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- Log security events (failed auth, suspicious activity)
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⚠️ 8. Database Backup Strategy
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- Implement automated daily backups
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- Test restore procedures
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- Store backups offsite
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### Low Priority
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⚠️ 9. Performance Optimization
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- Add Redis caching for frequently accessed data
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- Implement pagination for large result sets
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- Add database query caching
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⚠️ 10. Monitoring
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- Add application monitoring (Sentry, New Relic)
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- Database performance monitoring
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- Uptime monitoring
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## DEPLOYMENT CHECKLIST
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Before deploying to production:
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□ Change all default passwords
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□ Set SECRET_KEY environment variable
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□ Enable HTTPS/TLS
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□ Configure firewall rules
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□ Set up database backups
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□ Run migrate_database.py to add indexes
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□ Test all endpoints
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□ Review logs for errors
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□ Set FLASK_ENV=production
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□ Disable debug mode
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□ Configure reverse proxy (nginx/Apache)
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## MAINTENANCE TASKS
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Weekly:
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- Review application logs
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- Check database size
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- Monitor failed login attempts
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Monthly:
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- Update dependencies (pip, npm)
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- Review and rotate secrets
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- Test backup restore procedure
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Quarterly:
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- Security audit
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- Performance review
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- Dependency vulnerability scan
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## FILES CREATED/MODIFIED
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✅ Modified:
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- backend/app.py (security fixes, session management)
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- backend/postgresql_models.py (indexes, constraints)
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- frontend/src/api.js (error handling)
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✅ Created:
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- .env.example (environment template)
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- backend/migrate_database.py (database migration script)
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- SECURITY_AUDIT.md (this file)
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## TESTING COMMANDS
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# Test backend endpoints
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curl <http://localhost:8080/api/health>
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# Check database connections
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python -c "from backend.postgresql_models import engine; print(engine.connect())"
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# Run migration
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cd backend && python migrate_database.py
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# Install updated dependencies
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cd backend && pip install -r requirements.txt
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cd frontend && npm install
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## SUPPORT
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For questions or issues, refer to:
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- CONFIGURATION_GUIDE.md
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- POSTGRESQL_SETUP_COMPLETE.md
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- QUICK_REFERENCE.md
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"""
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