Dependency Scanning

Identify vulnerabilities in third-party dependencies and libraries.

When to Use This Skill

Use this skill when:

• Managing third-party dependencies
• Implementing software composition analysis
• Meeting compliance requirements
• Securing the software supply chain
• Automating vulnerability detection

Prerequisites

• Package manifest files (package.json, requirements.txt, etc.)
• CI/CD pipeline access
• Dependency scanning tool

Tool Comparison

Tool	Type	Languages	Best For
Snyk	Commercial/Free	Many	Comprehensive SCA
Dependabot	Free (GitHub)	Many	Automated PRs
OWASP Dep-Check	OSS	Many	Free scanning
npm audit	Built-in	Node.js	Quick checks
pip-audit	OSS	Python	Python projects
Trivy	OSS	Many	Container deps

Snyk

CLI Usage

# Install
npm install -g snyk

# Authenticate
snyk auth

# Test project
snyk test

# Monitor project (track over time)
snyk monitor

# Test specific manifest
snyk test --file=package.json
snyk test --file=requirements.txt

# Output formats
snyk test --json > snyk-results.json
snyk test --sarif > snyk-results.sarif

# Fix vulnerabilities
snyk fix

# Ignore vulnerability
snyk ignore --id=SNYK-JS-LODASH-567746 --expiry=2024-12-31 --reason="No exploit path"

CI Integration

# .github/workflows/snyk.yml
name: Snyk Security

on:
  push:
    branches: [main]
  pull_request:

jobs:
  snyk:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Run Snyk to check for vulnerabilities
        uses: snyk/actions/node@master
        env:
          SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
        with:
          args: --severity-threshold=high

      - name: Upload results to GitHub
        uses: github/codeql-action/upload-sarif@v3
        with:
          sarif_file: snyk.sarif

Policy File

# .snyk
version: v1.25.0
ignore:
  SNYK-JS-LODASH-567746:
    - '*':
        reason: No user input reaches this function
        expires: 2024-12-31
        created: 2024-01-15

  'snyk:lic:npm:gpl-3.0':
    - '*':
        reason: Internal use only
        
patch: {}

GitHub Dependabot

Configuration

# .github/dependabot.yml
version: 2
updates:
  # JavaScript/Node.js
  - package-ecosystem: "npm"
    directory: "/"
    schedule:
      interval: "weekly"
      day: "monday"
    open-pull-requests-limit: 10
    reviewers:
      - "security-team"
    labels:
      - "dependencies"
      - "security"
    ignore:
      - dependency-name: "aws-sdk"
        update-types: ["version-update:semver-major"]
    groups:
      development-dependencies:
        dependency-type: "development"
        update-types:
          - "minor"
          - "patch"

  # Python
  - package-ecosystem: "pip"
    directory: "/"
    schedule:
      interval: "daily"
    
  # Docker
  - package-ecosystem: "docker"
    directory: "/"
    schedule:
      interval: "weekly"
    
  # GitHub Actions
  - package-ecosystem: "github-actions"
    directory: "/"
    schedule:
      interval: "weekly"

Security Alerts

# Automated security updates
# Enable in repository Settings > Security > Dependabot

# Dependabot will automatically:
# - Create PRs for vulnerable dependencies
# - Update to patched versions
# - Provide CVE details in PR description

OWASP Dependency-Check

Installation

# Download
wget https://github.com/jeremylong/DependencyCheck/releases/download/v9.0.0/dependency-check-9.0.0-release.zip
unzip dependency-check-9.0.0-release.zip

# Or via Homebrew
brew install dependency-check

Usage

# Scan project
dependency-check --project "MyProject" \
  --scan /path/to/project \
  --out /path/to/reports \
  --format HTML \
  --format JSON

# With specific analyzers
dependency-check --project "MyProject" \
  --scan . \
  --enableExperimental \
  --disableRetireJS

# CI configuration
dependency-check --project "MyProject" \
  --scan . \
  --format JSON \
  --failOnCVSS 7 \
  --suppression suppression.xml

Suppression File

<!-- suppression.xml -->
<?xml version="1.0" encoding="UTF-8"?>
<suppressions xmlns="https://jeremylong.github.io/DependencyCheck/dependency-suppression.1.3.xsd">
  <suppress>
    <notes>False positive - not using vulnerable function</notes>
    <packageUrl regex="true">^pkg:npm/lodash@.*$</packageUrl>
    <cve>CVE-2021-23337</cve>
  </suppress>
  
  <suppress until="2024-12-31">
    <notes>Risk accepted - mitigated by WAF</notes>
    <cpe>cpe:/a:apache:struts:2.5.0</cpe>
    <vulnerabilityName>CVE-2023-12345</vulnerabilityName>
  </suppress>
</suppressions>

Maven Integration

<!-- pom.xml -->
<plugin>
  <groupId>org.owasp</groupId>
  <artifactId>dependency-check-maven</artifactId>
  <version>9.0.0</version>
  <configuration>
    <failBuildOnCVSS>7</failBuildOnCVSS>
    <suppressionFiles>
      <suppressionFile>suppression.xml</suppressionFile>
    </suppressionFiles>
  </configuration>
  <executions>
    <execution>
      <goals>
        <goal>check</goal>
      </goals>
    </execution>
  </executions>
</plugin>

Language-Specific Tools

Node.js (npm audit)

# Run audit
npm audit

# JSON output
npm audit --json

# Fix automatically
npm audit fix

# Fix with breaking changes
npm audit fix --force

# Production only
npm audit --production

Python (pip-audit)

# Install
pip install pip-audit

# Scan installed packages
pip-audit

# Scan requirements file
pip-audit -r requirements.txt

# Output formats
pip-audit --format json
pip-audit --format cyclonedx-json

# Fix vulnerabilities
pip-audit --fix

Go (govulncheck)

# Install
go install golang.org/x/vuln/cmd/govulncheck@latest

# Scan project
govulncheck ./...

# JSON output
govulncheck -json ./...

Ruby (bundler-audit)

# Install
gem install bundler-audit

# Update database
bundle-audit update

# Run audit
bundle-audit check

# Output format
bundle-audit check --format json

SBOM Generation

CycloneDX

# Node.js
npx @cyclonedx/cyclonedx-npm --output-file sbom.json

# Python
pip install cyclonedx-bom
cyclonedx-py -o sbom.json

# Go
go install github.com/CycloneDX/cyclonedx-gomod/cmd/cyclonedx-gomod@latest
cyclonedx-gomod mod -json > sbom.json

Syft

# Install
curl -sSfL https://raw.githubusercontent.com/anchore/syft/main/install.sh | sh -s

# Generate SBOM
syft dir:/path/to/project -o cyclonedx-json > sbom.json
syft dir:/path/to/project -o spdx-json > sbom-spdx.json

# From container
syft myimage:latest -o cyclonedx-json > sbom.json

CI/CD Pipeline

# Comprehensive dependency scanning
name: Dependency Security

on:
  push:
    branches: [main]
  pull_request:
  schedule:
    - cron: '0 8 * * *'

jobs:
  scan:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: npm audit
        run: npm audit --audit-level=high

      - name: Snyk scan
        uses: snyk/actions/node@master
        env:
          SNYK_TOKEN: ${{ secrets.SNYK_TOKEN }}
        with:
          args: --severity-threshold=high
          
      - name: Generate SBOM
        run: npx @cyclonedx/cyclonedx-npm --output-file sbom.json

      - name: Upload SBOM
        uses: actions/upload-artifact@v4
        with:
          name: sbom
          path: sbom.json

Common Issues

Issue: Too Many Alerts

Problem: Overwhelmed by vulnerability count Solution: Prioritize by exploitability, filter by severity

Issue: No Fix Available

Problem: Vulnerable dependency has no patch Solution: Consider alternatives, implement compensating controls

Issue: Breaking Updates

Problem: Security fix breaks functionality Solution: Review changelogs, test thoroughly, use lockfiles

Best Practices

• Scan on every build
• Use lockfiles for reproducibility
• Set severity thresholds
• Generate and track SBOMs
• Document exceptions properly
• Update dependencies regularly
• Monitor for new vulnerabilities
• Automate PR creation for updates

Related Skills

• sast-scanning - Code vulnerabilities
• container-scanning - Container dependencies
• github-actions - CI integration