Security Scanner

Security Scanner

Routes security scanning tasks to the correct tool based on scan target and goal.

Routing Table

Tool Commands

trivy — Container & Filesystem CVE Scanning

# Install
brew install trivy

# Scan container image
trivy image nginx:latest

# Scan local filesystem
trivy fs /path/to/project

# Scan IaC (Terraform, k8s)
trivy config /path/to/iac

# JSON output
trivy image --format json --output results.json nginx:latest

# Fail on HIGH+ severity
trivy image --exit-code 1 --severity HIGH,CRITICAL nginx:latest

gitleaks — Git History Secret Scanning

# Install
brew install gitleaks

# Scan current repo
gitleaks detect --source . --report-format json --report-path gitleaks-report.json

# Scan specific branch
gitleaks detect --source . --log-opts "main..HEAD"

# Pre-commit hook
gitleaks protect --staged

trufflehog — Secret Detection + Validation

# Install
brew install trufflehog

# Scan GitHub repo
trufflehog github --repo https://github.com/org/repo

# Scan local filesystem
trufflehog filesystem /path/to/project --only-verified

# Scan git history (only verified live secrets)
trufflehog git file://. --only-verified --json

semgrep — SAST / Custom Rules

# Install
pip install semgrep

# Auto-detect language and use community rules
semgrep --config=auto /path/to/code

# Security-focused ruleset
semgrep --config=p/security-audit /path/to/code

# Specific language
semgrep --config=p/python /path/to/code

# Custom rule file
semgrep --config=rules.yml /path/to/code

# JSON output
semgrep --config=auto --json -o results.json /path/to/code

grype — SBOM-Based Vulnerability Scanning

# Install
brew install grype

# Also install syft for SBOM generation
brew install syft

# Scan container image
grype nginx:latest

# Scan from SBOM
syft nginx:latest -o syft-json > sbom.json
grype sbom:sbom.json

# Scan local directory
grype dir:/path/to/project

# Only show HIGH+
grype nginx:latest --fail-on high

gosec — Go Security Audit

# Install
go install github.com/securego/gosec/v2/cmd/gosec@latest

# Scan Go project
gosec ./...

# JSON output
gosec -fmt json -out results.json ./...

# Specific rule categories
gosec -include=G101,G401 ./...

# Exclude test files
gosec -exclude-dir=vendor ./...

owasp-zap — DAST Web App Scanning

# Docker (recommended)
docker pull ghcr.io/zaproxy/zaproxy:stable

# Baseline scan (passive)
docker run -t ghcr.io/zaproxy/zaproxy:stable zap-baseline.py \
  -t https://target-app.example.com -r report.html

# Full scan (active)
docker run -t ghcr.io/zaproxy/zaproxy:stable zap-full-scan.py \
  -t https://target-app.example.com -r report.html

# API scan (OpenAPI/Swagger)
docker run -t ghcr.io/zaproxy/zaproxy:stable zap-api-scan.py \
  -t https://target-app.example.com/openapi.json -f openapi -r report.html

snyk — SaaS-Integrated Scanning

# Install
brew install snyk
# or
npm install -g snyk

# Auth (requires SNYK_TOKEN or interactive login)
snyk auth $SNYK_TOKEN

# Scan dependencies
snyk test

# Scan container
snyk container test nginx:latest

# Scan IaC
snyk iac test /path/to/terraform/

# Monitor (report to Snyk dashboard)
snyk monitor

Decision Guide

"Scan my Docker image for CVEs" → trivy image "Did we ever commit a secret?" → gitleaks detect "Do we have live AWS keys anywhere?" → trufflehog --only-verified "Find SQL injection in our Python code" → semgrep --config=p/python "Scan our Go service for security issues" → gosec ./... "Test our running API for vulnerabilities" → owasp-zap zap-api-scan.py "Full SaaS-managed scanning with fix suggestions" → snyk (requires account)

Output Interpretation

• trivy / grype: CVE IDs, severity (CRITICAL/HIGH/MEDIUM/LOW), fixed-in version
• gitleaks / trufflehog: File path, line number, secret type, commit hash
• semgrep: Rule ID, message, file, line, fix suggestion
• gosec: CWE ID, severity, confidence, file, line
• owasp-zap: OWASP category, risk level, evidence, solution

CI Integration Notes

All tools support --exit-code 1 or equivalent to fail pipelines on findings. Trivy, semgrep, and snyk have native GitHub Actions integrations. Gitleaks has a pre-commit hook mode (gitleaks protect --staged).

Related Skills

• static-code-analysis — code scanning
• container-security — container scanning
• dependency-auditor — dependency scanning

GitNexus Index

This skill is indexed by GitNexus for knowledge graph traversal. Index path: /Users/localuser/.claude/skills/security-scanner/.gitnexus Last indexed: 2026-05-23