security-analyzer

What this skill does

# Security Analyzer

Analyze environments for vulnerabilities, fetch current CVE/exploit data, and generate phased remediation plans with TDD validation.

## Quick Start

When the user requests a security scan:

1. Run environment discovery: `python .claude/skills/security-analyzer/scripts/discover_env.py .`
2. Save output to `inventory.json`
3. Run vulnerability scan: `python .claude/skills/security-analyzer/scripts/fetch_vulns.py inventory.json`
4. Save output to `scan_results.json`
5. Generate reports: `python .claude/skills/security-analyzer/scripts/generate_report.py scan_results.json inventory.json`

## Workflow

### Phase 1: Environment Discovery

Scan working directory for:
- **Dependencies**: `package.json`, `requirements.txt`, `Gemfile`, `go.mod`, `Cargo.toml`, `pom.xml`
- **Containers**: `Dockerfile`, `docker-compose.yml`, `kubernetes/*.yaml`
- **Cloud IaC**: `terraform/*.tf`, `cloudformation/*.yaml`, `*.bicep`
- **Secrets**: `.env*` files (flag exposure risk, never log values)

Run the discovery script:
```bash
python .claude/skills/security-analyzer/scripts/discover_env.py /path/to/project > inventory.json
```

### Phase 2: Vulnerability Intelligence

Fetch current threat data using the vulnerability scanner:

```bash
python .claude/skills/security-analyzer/scripts/fetch_vulns.py inventory.json > scan_results.json
```

| Source | Priority | Use For |
|--------|----------|---------|
| CISA KEV | 1 | Actively exploited vulns (use WebSearch) |
| NVD | 2 | CVE details + CVSS scores (use WebSearch) |
| GitHub Advisories | 3 | Package-specific vulns (use WebSearch) |
| OSV.dev | 4 | Open source vulns (API in script) |

For CISA KEV and additional context, supplement with:
```
WebSearch: "CVE-XXXX-YYYY CISA KEV exploit"
```

### Phase 3: Risk Scoring

The scanner calculates risk scores using:

```
Risk = (CVSS * 0.3) + (Exploitability * 0.3) + (Criticality * 0.2) + (Exposure * 0.2)

Exploitability: 10=CISA KEV, 7=public exploit, 3=theoretical
Criticality: 10=auth/payment, 5=core business, 2=logging
Exposure: 10=internet-facing, 5=internal, 2=air-gapped
```

### Phase 4: Phased Remediation

Generate reports with fix commands and validation tests:

```bash
python .claude/skills/security-analyzer/scripts/generate_report.py scan_results.json inventory.json
```

Each finding includes:
1. Vulnerability details + risk score
2. Actual fix code/patch (not just recommendations)
3. Pre-fix test (proves vuln exists)
4. Remediation unit tests (tests the fix code)
5. Post-fix validation (proves vuln resolved)

### Phase 5: Reports

Output two reports:
- `security-report-technical.md` — Full details for engineers
- `security-report-executive.md` — Summary for leadership

See `references/report-templates.md` for output structure.

## TDD Pattern

For each vulnerability, generate three test types:

```python
def test_vuln_exists():
    """PASS before fix, FAIL after"""
    assert is_vulnerable("component") == True

def test_fix_works():
    """Unit test for remediation code"""
    result = apply_fix(vulnerable_config)
    assert result.is_secure()

def test_vuln_resolved():
    """FAIL before fix, PASS after"""
    assert is_vulnerable("component") == False
```

## Fix Types by Finding

| Finding | Output |
|---------|--------|
| Dependency CVE | Version bump command + lockfile update |
| Container issue | Dockerfile patch |
| IaC misconfiguration | Terraform/K8s fix |
| Code vulnerability | Source patch + test |
| Secret exposure | Rotation commands + `.gitignore` update |

## Example Interaction

**User:** "Run a security scan on this project"

**Claude:**
1. Discovers 47 npm dependencies, 3 Dockerfiles, 2 Terraform configs
2. Fetches current CVE data from OSV.dev
3. Identifies 12 vulnerabilities (2 critical, 4 high, 6 medium)
4. Generates phased remediation plan with:
   - Actual fix commands (`npm install [email protected]`)
   - Code patches for IaC misconfigurations
   - TDD tests proving each fix works
5. Outputs technical and executive reports