nas/SECURITY.md

Security Policy

🔒 Security Overview

The NAS Setup Script takes security seriously. This document outlines our security policy, how to report vulnerabilities, and our commitment to maintaining a secure codebase.

🚨 Reporting Vulnerabilities

If you discover a security vulnerability in this project, please help us by reporting it responsibly.

📧 How to Report

Please DO NOT report security vulnerabilities through public GitHub issues.

Instead, please report security vulnerabilities by emailing:

• Email: moin@linuxcommand.dev
• Subject: [SECURITY] NAS Setup Script Vulnerability Report

⏰ Response Timeline

We will acknowledge your report within 48 hours and provide a more detailed response within 7 days indicating our next steps.

We will keep you informed about our progress throughout the process of fixing the vulnerability.

📋 What to Include

Please include the following information in your report:

• A clear description of the vulnerability
• Steps to reproduce the issue
• Potential impact and severity
• Any suggested fixes or mitigations
• Your contact information for follow-up

🛡️ Security Considerations

Current Security Features

The NAS Setup Script includes several security measures:

• Input Validation: Comprehensive validation of all user inputs
• SSH Hardening: Ed25519 key generation and secure configurations
• Firewall Management: IPv4/IPv6 firewall rules with UFW/Firewalld
• Intrusion Detection: Fail2ban integration for brute-force protection
• Audit Logging: System auditing with auditd
• Access Control: Mandatory Access Control (AppArmor/SELinux)
• Secure Defaults: Conservative security settings by default
• Distribution Detection: Robust 5-method fallback system with container environment detection
• Version Validation: Advanced regex parsing and bc calculator for precise version comparisons
• Unit Testing: Comprehensive test suite (66+ test cases) ensuring code reliability
• Container Security: Detection and warnings for Docker/Podman/LXC/WSL environments

Known Limitations

• Root Access Required: The script requires root/sudo privileges for system configuration
• Network Dependencies: Internet access required for package downloads
• Service Exposure: Configured services may expose ports to networks
• User Responsibility: End users are responsible for their network security

🔧 Security Updates

Security updates will be released as patch versions following semantic versioning:

• Critical vulnerabilities: Immediate patch release
• High severity: Within 7 days
• Medium/Low severity: Included in next minor release

📚 Best Practices for Users

Before Installation

• Review the code and understand what the script does
• Test in a virtualized environment first
• Backup important data before running
• Ensure you have console access in case of issues

After Installation

• Change default passwords immediately
• Review firewall rules and service configurations
• Monitor system logs regularly
• Keep the system updated with security patches
• Use strong, unique passwords for all services

Network Security

• Place the NAS in a secure network segment
• Use VPN for remote access when possible
• Implement network segmentation
• Regularly audit network access logs

🏷️ Vulnerability Classification

We use the following severity levels:

• Critical: Remote code execution, privilege escalation, data loss
• High: Authentication bypass, significant data exposure
• Medium: Information disclosure, DoS attacks
• Low: Minor issues with limited impact

🤝 Security Hall of Fame

We appreciate security researchers who help make this project safer. With your permission, we'll acknowledge your contribution in our security hall of fame.

📞 Contact

For security-related questions or concerns:

• Security Issues: Use the reporting process above
• General Security Questions: Create a GitHub Discussion
• Documentation Issues: Submit a GitHub Issue

📜 Disclaimer

This software is provided "as is" without warranty. Users are responsible for their own security practices and should evaluate the suitability of this software for their specific use case.

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Last updated: October 2025 /Volumes/homes/sebastian/Projekte/github/nas-main/SECURITY.md