Security Enhancements and Best Practices Improvements

[dmisiuk]

Security Enhancements and Best Practices Improvements

This PR implements comprehensive security improvements to the OpenHands Apple Silicon setup, addressing multiple security concerns and following Docker security best practices.

🔒 Security Improvements

Container Security

• Resource Limits: Added configurable memory (4GB) and CPU (2.0) limits to prevent resource exhaustion
• Read-only Filesystem: Implemented read-only root filesystem with tmpfs mounts for /tmp and /run
• Capability Management: Implemented least privilege with capability dropping (only essential capabilities added)
• Security Options: Added no-new-privileges security option to prevent privilege escalation

Docker Security

• Socket Monitoring: Added Docker socket permission validation and warnings
• Image Validation: Added image existence checks before container startup
• Secure Cleanup: Replaced unsafe docker container prune with targeted cleanup

Environment Security

• Variable Validation: Added detection of suspicious environment variables containing secrets
• File Permissions: Implemented secure file permissions (600) for logs and PID files
• Audit Logging: Added comprehensive security event logging with timestamps

🛠️ Technical Improvements

Enhanced Script Features

• Security Command: Added ./openhands-gui.sh security for detailed security information
• Better Error Handling: Implemented set -euo pipefail for strict error handling
• Configuration Management: Added configurable environment variables for all settings
• Improved Logging: Enhanced logging with security event tracking

Configuration Options

• OPENHANDS_CONTAINER_NAME: Custom container name
• OPENHANDS_MEMORY_LIMIT: Memory limit (default: 4g)
• OPENHANDS_CPU_LIMIT: CPU limit (default: 2.0)
• LOG_ALL_EVENTS: Verbose logging control

📋 New Files

• SECURITY.md: Comprehensive security policy documentation
• Enhanced .gitignore: Added security.log to excluded files

🔍 Security Monitoring

The enhanced script now provides:

• Security audit logging
• Docker socket permission monitoring
• Container resource usage tracking
• Environment variable validation
• File permission enforcement

🚀 Breaking Changes

None - all changes are backward compatible and enhance security without affecting functionality.

🧪 Testing

All improvements have been tested for:

• Backward compatibility
• Security effectiveness
• Performance impact
• Usability improvements

📚 Documentation

Added comprehensive security documentation including:

• Security features overview
• Best practices guide
• Security monitoring procedures
• Incident response recommendations
• Configuration options

This PR significantly improves the security posture of the OpenHands Apple Silicon setup while maintaining full functionality and ease of use.