# Security Policy
## Supported Versions
We actively support the following versions of MCP Color Server with security updates:
| Version | Supported |
| ------- | ------------------ |
| 1.x.x | :white_check_mark: |
| < 1.0 | :x: |
## Reporting a Vulnerability
We take the security of MCP Color Server seriously. If you believe you have found a security vulnerability, please report it to us as described below.
### How to Report
**Please do not report security vulnerabilities through public GitHub issues.**
Instead, please report them via email to: **security@mcp-color-server.org**
You should receive a response within 48 hours. If for some reason you do not, please follow up via email to ensure we received your original message.
### What to Include
Please include the following information in your report:
- Type of issue (e.g. buffer overflow, SQL injection, cross-site scripting, etc.)
- Full paths of source file(s) related to the manifestation of the issue
- The location of the affected source code (tag/branch/commit or direct URL)
- Any special configuration required to reproduce the issue
- Step-by-step instructions to reproduce the issue
- Proof-of-concept or exploit code (if possible)
- Impact of the issue, including how an attacker might exploit the issue
This information will help us triage your report more quickly.
### Preferred Languages
We prefer all communications to be in English.
## Security Measures
### Input Validation
MCP Color Server implements comprehensive input validation:
- **Color Format Validation**: All color inputs are validated against known safe formats
- **Parameter Bounds Checking**: Numeric parameters are checked for valid ranges
- **URL Sanitization**: Image URLs are validated and sanitized before processing
- **File Type Validation**: Uploaded files are checked for valid image types
- **Size Limits**: All inputs have appropriate size limits to prevent resource exhaustion
### Output Sanitization
- **HTML Generation**: All generated HTML is sanitized to prevent XSS attacks
- **CSS Generation**: Generated CSS is validated to prevent code injection
- **SVG Sanitization**: SVG outputs are sanitized to remove potentially malicious content
- **Base64 Validation**: All base64 encoded outputs are validated for integrity
### Resource Protection
- **Memory Limits**: Operations are limited to prevent memory exhaustion (100MB per request)
- **Processing Timeouts**: Long-running operations have timeouts to prevent resource hogging
- **Rate Limiting**: Built-in rate limiting for expensive operations
- **Concurrent Request Limits**: Maximum concurrent requests are limited
### Secure Dependencies
- **Regular Updates**: Dependencies are regularly updated to patch security vulnerabilities
- **Vulnerability Scanning**: Automated scanning for known vulnerabilities in dependencies
- **Minimal Dependencies**: We use minimal, well-maintained dependencies to reduce attack surface
- **License Compliance**: All dependencies are checked for license compatibility
## Security Best Practices for Users
### Server Deployment
When deploying MCP Color Server in production:
1. **Network Security**
- Run behind a reverse proxy (nginx, Apache)
- Use HTTPS for all communications
- Implement proper firewall rules
- Limit network access to necessary ports only
2. **Process Security**
- Run the server with minimal privileges
- Use a dedicated user account for the server process
- Implement proper logging and monitoring
- Set up log rotation to prevent disk space issues
3. **Resource Limits**
- Configure appropriate memory limits
- Set CPU usage limits
- Implement disk space monitoring
- Use process managers (PM2, systemd) for automatic restarts
4. **Input Validation**
- Validate all inputs at the application layer
- Implement additional rate limiting if needed
- Monitor for suspicious activity patterns
- Log security-relevant events
### Client Integration
When integrating with MCP Color Server:
1. **Authentication**
- Implement proper authentication mechanisms
- Use secure communication channels
- Validate server responses
- Handle errors gracefully
2. **Data Handling**
- Validate all data received from the server
- Sanitize outputs before displaying to users
- Implement proper error handling
- Log security events appropriately
## Known Security Considerations
### Image Processing
- **File Size Limits**: Large image files can consume significant memory
- **File Type Validation**: Only specific image formats are supported
- **Processing Timeouts**: Image processing operations have timeouts
- **Memory Management**: Automatic cleanup of image processing resources
### Color Calculations
- **Precision Limits**: Mathematical operations are limited to prevent overflow
- **Input Validation**: All color values are validated for valid ranges
- **Algorithm Safety**: Color algorithms are designed to handle edge cases safely
### Visualization Generation
- **HTML Sanitization**: All generated HTML is sanitized
- **CSS Validation**: Generated CSS is validated for safety
- **Resource Limits**: Visualization generation has memory and time limits
- **Output Validation**: All outputs are validated before returning
## Vulnerability Disclosure Timeline
1. **Initial Report**: Vulnerability reported via email
2. **Acknowledgment**: We acknowledge receipt within 48 hours
3. **Investigation**: We investigate and validate the vulnerability (1-7 days)
4. **Fix Development**: We develop and test a fix (1-14 days depending on severity)
5. **Release**: We release a patched version
6. **Public Disclosure**: We publicly disclose the vulnerability after users have had time to update (typically 30 days after release)
## Security Updates
Security updates are released as patch versions (e.g., 1.0.1, 1.0.2) and are clearly marked in the changelog. We recommend:
- Subscribe to release notifications on GitHub
- Regularly update to the latest version
- Review security advisories before updating
- Test updates in a staging environment first
## Contact Information
For security-related questions or concerns:
- **Email**: security@mcp-color-server.org
- **GPG Key**: [Available on request]
- **Response Time**: Within 48 hours for initial response
For general questions about security practices:
- **GitHub Discussions**: Use the Security category
- **Documentation**: Check the security section in our docs
- **Community**: Join our community discussions
## Acknowledgments
We would like to thank the following individuals for responsibly disclosing security vulnerabilities:
- [List will be updated as vulnerabilities are reported and fixed]
## Security Resources
- [OWASP Top 10](https://owasp.org/www-project-top-ten/)
- [Node.js Security Best Practices](https://nodejs.org/en/docs/guides/security/)
- [npm Security Advisories](https://www.npmjs.com/advisories)
- [GitHub Security Advisories](https://github.com/advisories)
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This security policy is reviewed and updated regularly to ensure it remains current with best practices and emerging threats.