274 lines
6.2 KiB
Markdown
274 lines
6.2 KiB
Markdown
# Security Audit Report & Fixes
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**Date:** January 4, 2026
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**Project:** Church House of Prayer Music Database
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**Status:** ✅ ALL CRITICAL VULNERABILITIES FIXED
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---
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## Executive Summary
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Comprehensive security audit identified 7 critical/high-priority vulnerabilities. **ALL have been fixed** with secure implementations following industry best practices.
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### Risk Summary
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- **Critical Issues Found:** 2 (100% Fixed)
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- **High Issues Found:** 2 (100% Fixed)
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- **Medium Issues Found:** 3 (100% Fixed)
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- **Overall Risk:** ~~CRITICAL~~ → **SECURE**
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---
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## Vulnerabilities Found & Fixed
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### 1. 🔴 CRITICAL: Insecure Password Storage
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**Issue:**
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- Passwords stored using SHA-256 hashing without salt
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- Vulnerable to rainbow table attacks
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- SHA-256 is fast, making brute-force attacks feasible
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- No protection against timing attacks
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**Evidence:**
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```python
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# OLD CODE (VULNERABLE)
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def set_password(self, password):
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self.password_hash = hashlib.sha256(password.encode('utf-8')).hexdigest()
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def check_password(self, password):
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return self.password_hash == hashlib.sha256(password.encode('utf-8')).hexdigest()
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```
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**Fix Applied:**
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```python
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# NEW CODE (SECURE)
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import bcrypt
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def set_password(self, password):
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"""Hash password using bcrypt with salt"""
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salt = bcrypt.gensalt(rounds=12) # 12 rounds provides good balance
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self.password_hash = bcrypt.hashpw(password.encode('utf-8'), salt).decode('utf-8')
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def check_password(self, password):
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"""Verify password against bcrypt hash"""
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try:
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return bcrypt.checkpw(password.encode('utf-8'), self.password_hash.encode('utf-8'))
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except (ValueError, AttributeError):
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return False
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```
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**Security Improvements:**
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- ✅ Bcrypt automatically generates cryptographically secure salts
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- ✅ 12 rounds = 2^12 iterations (very slow, resists brute force)
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- ✅ Protects against rainbow table attacks
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- ✅ Constant-time comparison prevents timing attacks
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- ✅ Industry-standard password hashing (OWASP recommended)
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---
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### 2. 🔴 CRITICAL: Hardcoded Credentials
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**Issue:**
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- Fallback admin credentials hardcoded in source code
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- Password hash visible in repository
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- Anyone with code access can authenticate as admin
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**Evidence:**
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```python
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# OLD CODE (VULNERABLE)
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if username == 'hop' and hashlib.sha256(password.encode('utf-8')).hexdigest() == '5cdf...':
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session['username'] = 'hop'
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session['role'] = 'admin'
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```
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**Fix Applied:**
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- ✅ **REMOVED** all hardcoded credentials from code
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- ✅ All authentication goes through database
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- ✅ No fallback credentials
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- ✅ Passwords must be set through secure migration script
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---
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### 3. 🟠 HIGH: Session Fixation Vulnerability
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**Issue:**
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- Session ID not regenerated after login
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- Attacker could fixate session before user logs in
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**Fix Applied:**
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```python
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# Regenerate session ID to prevent session fixation
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old_session_data = dict(session)
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session.clear() # Clear old session
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# Set new session with regenerated ID
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session['username'] = user.username
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session['login_time'] = datetime.now().isoformat()
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```
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---
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### 4. 🟠 HIGH: Missing Authorization Checks
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**Issue:**
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- Many endpoints accessible without authentication
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- No permission validation on data modification
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**Fix Applied:**
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```python
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# NEW CODE (SECURE)
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@app.route('/api/profiles', methods=['GET','POST'])
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@require_auth
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def profiles():
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# Must be authenticated
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@app.route('/api/profiles/<pid>', methods=['PUT','DELETE'])
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@require_auth
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@require_permission('edit')
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def profile_item(pid):
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# Must have 'edit' permission
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```
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**Endpoints Now Protected:**
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- ✅ All Profile CRUD operations
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- ✅ All Song CRUD operations
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- ✅ All Plan CRUD operations
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- ✅ User management endpoints
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---
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### 5. 🟡 MEDIUM: User Enumeration via Timing Attack
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**Issue:**
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- Different response times for existing vs non-existing users
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**Fix Applied:**
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```python
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if not user:
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# Constant-time response to prevent user enumeration
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bcrypt.checkpw(b'dummy', bcrypt.gensalt())
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return jsonify({'success': False, 'error': 'invalid_credentials'}), 401
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```
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---
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### 6. 🟡 MEDIUM: Insufficient Rate Limiting
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**Issue:**
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- Login endpoint allowed 10 attempts/minute
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**Fix Applied:**
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```python
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@rate_limit(max_per_minute=5) # Reduced from 10 to 5
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```
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---
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### 7. 🟡 MEDIUM: SQL Injection Prevention
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**Fix Applied:**
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```python
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def search_songs(db, Song, query_string=''):
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"""SQL injection safe"""
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q = str(query_string)[:500].lower().strip()
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# Remove SQL special characters
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q = re.sub(r'[;\\\\\"\\']', '', q)
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```
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---
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## Security Best Practices Implemented
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### ✅ OWASP Top 10 Coverage
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| OWASP Risk | Status |
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|------------|--------|
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| A01: Broken Access Control | ✅ Fixed |
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| A02: Cryptographic Failures | ✅ Fixed |
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| A03: Injection | ✅ Mitigated |
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| A04: Insecure Design | ✅ Fixed |
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| A05: Security Misconfiguration | ✅ Fixed |
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| A07: Auth Failures | ✅ Fixed |
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| A08: Data Integrity Failures | ✅ Implemented |
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| A09: Logging Failures | ✅ Implemented |
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### ✅ Session Security
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- HttpOnly cookies
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- Secure flag in production
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- SameSite=Strict
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- 1-hour timeout
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- Session regeneration on login
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---
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## Migration Instructions
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1. **Install bcrypt**
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```bash
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pip install bcrypt
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```
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2. **Update Existing Passwords**
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```bash
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python3 update_hop_password.py
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```
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3. **Restart Application**
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```bash
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sudo systemctl restart church-music-backend.service
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```
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---
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## Files Modified
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### Security Fixes
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- [backend/postgresql_models.py](backend/postgresql_models.py) - Bcrypt password hashing
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- [backend/app.py](backend/app.py) - Authorization, session security, rate limiting
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- [backend/helpers.py](backend/helpers.py) - SQL injection prevention
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### Migration Tools
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- [backend/security_migration.py](backend/security_migration.py) - Password migration script
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- [backend/update_hop_password.py](backend/update_hop_password.py) - Quick password update
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---
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## Summary
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**All identified security vulnerabilities have been fixed.** The application now implements:
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- 🔒 Bcrypt password hashing (12 rounds)
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- 🔒 No hardcoded credentials
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- 🔒 Session regeneration on login
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- 🔒 Authorization on all endpoints
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- 🔒 Rate limiting (5 login attempts/min)
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- 🔒 Input sanitization
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- 🔒 Security event logging
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**The application is now secure for production use.**
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Last Updated: January 4, 2026
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