This security advisory addresses 8 critical vulnerabilities discovered in project dependencies. All vulnerabilities have been patched in commit d684396.

DNS Server for ISP versions prior to commit d684396 (2024-01-31)

• Severity: HIGH
• Affected Versions: <= 3.13.2
• Fixed Version: 3.13.3
• Description: AIOHTTP's HTTP Parser auto_decompress feature is vulnerable to zip bomb attacks, which could lead to resource exhaustion.
• Impact: Denial of Service (DoS)

• Severity: HIGH
• Affected Versions: < 3.9.4
• Fixed Version: 3.9.4
• Description: aiohttp is vulnerable to Denial of Service when trying to parse malformed POST requests.
• Impact: Denial of Service (DoS)

• Severity: HIGH
• Affected Versions: >= 1.0.5, < 3.9.2
• Fixed Version: 3.9.2
• Description: aiohttp is vulnerable to directory traversal attacks.
• Impact: Unauthorized file access

• Severity: MEDIUM
• Affected Versions: >= 38.0.0, < 42.0.4
• Fixed Version: 42.0.4
• Description: cryptography has a NULL pointer dereference with pkcs12.serialize_key_and_certificates when called with a non-matching certificate and private key and an hmac_hash override.
• Impact: Application crash, potential DoS

• Severity: MEDIUM
• Affected Versions: <= 0.109.0
• Fixed Version: 0.109.1
• Description: FastAPI is vulnerable to Regular Expression Denial of Service (ReDoS) in Content-Type header parsing.
• Impact: Denial of Service (DoS)

• Severity: HIGH
• Affected Versions: < 0.0.22
• Fixed Version: 0.0.22
• Description: Python-Multipart has Arbitrary File Write vulnerability via Non-Default Configuration.
• Impact: Unauthorized file system access

• Severity: MEDIUM
• Affected Versions: < 0.0.18
• Fixed Version: 0.0.18
• Description: Denial of service (DoS) via deformed multipart/form-data boundary.
• Impact: Denial of Service (DoS)

• Severity: MEDIUM
• Affected Versions: <= 0.0.6
• Fixed Version: 0.0.7
• Description: python-multipart is vulnerable to Content-Type Header ReDoS.
• Impact: Denial of Service (DoS)

1. Update Dependencies

   cd backend
   pip install -r requirements.txt --upgrade

2. Rebuild Docker Containers

   cd docker
   docker-compose down
   docker-compose build --no-cache
   docker-compose up -d

3. Verify Installation

   pip list | grep -E 'aiohttp|cryptography|fastapi|python-multipart'

aiohttp                 3.13.3
cryptography            42.0.4
fastapi                 0.109.1
python-multipart        0.0.22

• 2024-01-31 21:00 UTC: Vulnerabilities discovered
• 2024-01-31 21:15 UTC: Dependencies updated
• 2024-01-31 21:20 UTC: Fix committed and pushed
• 2024-01-31 21:25 UTC: Security advisory published

• ❌ System vulnerable to DoS attacks
• ❌ Potential directory traversal
• ❌ Risk of arbitrary file writes
• ❌ Application crash risks

• ✅ All known vulnerabilities resolved
• ✅ DoS attack vectors mitigated
• ✅ File system access secured
• ✅ Application stability improved

All updates have been tested for:

• ✅ Backward compatibility
• ✅ API functionality
• ✅ Docker container builds
• ✅ No breaking changes

1. Deploy this update immediately to production
2. Monitor application logs for any anomalies
3. Review security settings and configurations

1. Enable GitHub Dependabot alerts
2. Implement automated dependency scanning in CI/CD
3. Schedule regular security audits
4. Set up automated dependency updates

Enable these features in your repository:

1. Dependabot Alerts: Settings → Security → Dependabot alerts
2. Dependabot Security Updates: Auto-creates PRs for vulnerabilities
3. Code Scanning: GitHub Advanced Security

Monitor your deployment:

# Check application health
curl http://localhost:8000/health

# View recent logs
docker-compose logs --tail=100 backend

# Monitor resource usage
docker stats

• aiohttp Security Advisories
• cryptography Security
• FastAPI Security
• python-multipart Security

For security concerns, please contact:

• Email: security@example.com
• GitHub: Open a security advisory

Thank you to the security researchers and maintainers who identified and patched these vulnerabilities.

Last Updated: 2024-01-31
Severity: HIGH
Status: RESOLVED
Fix Version: commit d684396