Overview

This implementation introduces a comprehensive security vulnerability scanning system for the tf-shell project to strengthen security posture and automate vulnerability detection across local development and CI/CD.

Objectives

• Automated vulnerability scanning for Python dependencies
• Code security analysis for the Python codebase
• Integration of multiple security tools (Safety, Bandit, Semgrep, pip-audit, etc.)
• GitHub Actions CI/CD security workflow setup
• Dependabot configuration for automated dependency updates
• Full documentation and testing guide
• Local developer tooling for running security scans

Implementation Details

Files Added / Modified

• SECURITY.md — Security policy & vulnerability reporting guidelines
• .github/dependabot.yml — Dependabot automated update config
• .github/workflows/security.yml — Comprehensive security scanning workflow for CI/CD
• requirements-security.txt — Dependencies for security scanning tools
• .bandit — Bandit scanner configuration
• tools/security_scan.py — Local security scanning script
• tools/BUILD — Bazel integration for security tools
• README.md — Security section and usage instructions added
• docs/security-testing-guide.md — Detailed testing guide for the security stack
• .gitignore — Exclude generated security reports

Integrated Security Tools

• Safety — Python dependency vulnerability scanner
• Bandit — Python code security analyzer
• Semgrep — Static analysis/security rules scanning
• pip-audit — Package vulnerability auditing
• CodeQL — GitHub semantic code analysis
• TruffleHog — Secret scanning (keys, tokens, secrets)
• Dependabot — Automated dependency update PRs

Usage

Local Scanning

# Install security tools
pip install -r requirements-security.txt

# Run the comprehensive local security scan
python tools/security_scan.py

# Or run via Bazel
bazel run //tools:security_scanner

Automated CI/CD Behavior

• Security scans run on every pull request
• Weekly scheduled security scans via GitHub Actions
• Dependabot opens weekly dependency update PRs
• Security reports uploaded as GitHub Actions artifacts (JSON/HTML outputs)

Benefits

• Proactive Security: Continuous vulnerability monitoring
• Developer Friendly: Easy local and CI workflows for developers
• Comprehensive Coverage: Multi-layered scanning approach across deps, code, secrets, and semantic analysis
• Automated Updates: Dependabot-driven patching workflow
• Detailed Reporting: Machine-readable reports with remediation guidance
• Standards-Aligned: Aligns with security best practices

Testing

See docs/security-testing-guide.md for a full testing matrix covering:

• Manual testing steps
• CI/CD pipeline validation
• Per-tool functional tests (Safety, Bandit, Semgrep, pip-audit, CodeQL, TruffleHog)
• Error-handling and failure-mode verification
• Performance and regression testing

Next Steps

1. Run the security scanner against the current codebase and review results.
2. Triage and remediate initial vulnerability findings.
3. Monitor Dependabot PRs and establish an internal review/merge process.
4. Add security metrics (e.g., time-to-remediate, number of findings) to tracking dashboards.
5. Evaluate adding extra tooling if coverage gaps appear.

Implementation Notes

• Built following TDD principles and includes comprehensive error handling.
• Tool configurations are adjustable for project needs.
• Architecture is extensible to add new scanners or reporting outputs.
• Integrates with existing Bazel build system for consistent tool invocation.