mirror of
https://github.com/smittix/intercept.git
synced 2026-04-25 07:10:00 -07:00
8d9e5f9d56
Security improvements: - Add interface name validation to prevent command injection - Fix XSS vulnerability in pager message display - Add security headers (X-Content-Type-Options, X-Frame-Options, etc.) - Disable Werkzeug debug PIN - Add security documentation Features: - Add bias-t power support for SDR dongles across all modes Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
90 lines
3.4 KiB
Markdown
90 lines
3.4 KiB
Markdown
# Security Considerations
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INTERCEPT is designed as a **local signal intelligence tool** for personal use on trusted networks. This document outlines security considerations and best practices.
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## Network Binding
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By default, INTERCEPT binds to `0.0.0.0:5050`, making it accessible from any network interface. This is convenient for accessing the web UI from other devices on your local network, but has security implications:
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### Recommendations
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1. **Firewall Rules**: If you don't need remote access, configure your firewall to block external access to port 5050:
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```bash
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# Linux (iptables)
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sudo iptables -A INPUT -p tcp --dport 5050 -s 127.0.0.1 -j ACCEPT
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sudo iptables -A INPUT -p tcp --dport 5050 -j DROP
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# macOS (pf)
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echo "block in on en0 proto tcp from any to any port 5050" | sudo pfctl -ef -
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```
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2. **Bind to Localhost**: For local-only access, set the host environment variable:
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```bash
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export INTERCEPT_HOST=127.0.0.1
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python intercept.py
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```
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3. **Trusted Networks Only**: Only run INTERCEPT on networks you trust. The application has no authentication mechanism.
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## Authentication
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INTERCEPT does **not** include authentication. This is by design for ease of use as a personal tool. If you need to expose INTERCEPT to untrusted networks:
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1. Use a reverse proxy (nginx, Caddy) with authentication
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2. Use a VPN to access your home network
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3. Use SSH port forwarding: `ssh -L 5050:localhost:5050 your-server`
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## Security Headers
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INTERCEPT includes the following security headers on all responses:
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| Header | Value | Purpose |
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|--------|-------|---------|
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| `X-Content-Type-Options` | `nosniff` | Prevent MIME type sniffing |
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| `X-Frame-Options` | `SAMEORIGIN` | Prevent clickjacking |
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| `X-XSS-Protection` | `1; mode=block` | Enable browser XSS filter |
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| `Referrer-Policy` | `strict-origin-when-cross-origin` | Control referrer information |
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| `Permissions-Policy` | `geolocation=(self), microphone=()` | Restrict browser features |
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## Input Validation
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All user inputs are validated before use:
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- **Network interface names**: Validated against strict regex pattern
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- **Bluetooth interface names**: Must match `hciX` format
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- **MAC addresses**: Validated format
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- **Frequencies**: Validated range and format
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- **File paths**: Protected against directory traversal
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- **HTML output**: All user-provided content is escaped
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## Subprocess Execution
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INTERCEPT executes external tools (rtl_fm, airodump-ng, etc.) via subprocess. Security measures:
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- **No shell execution**: All subprocess calls use list arguments, not shell strings
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- **Input validation**: All user-provided arguments are validated before use
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- **Process isolation**: Each tool runs in its own process with limited permissions
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## Debug Mode
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Debug mode is **disabled by default**. If enabled via `INTERCEPT_DEBUG=true`:
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- The Werkzeug debugger PIN is disabled (not needed for local tool)
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- Additional logging is enabled
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- Stack traces are shown on errors
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**Never run in debug mode on untrusted networks.**
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## Reporting Security Issues
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If you discover a security vulnerability, please report it by:
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1. Opening a GitHub issue (for non-sensitive issues)
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2. Emailing the maintainer directly (for sensitive issues)
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Please include:
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- Description of the vulnerability
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- Steps to reproduce
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- Potential impact
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- Suggested fix (if any)
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