Run2 vulnerability csv reporting

Vulnerability CSV Reporting (Round 2)

CSV Schema (exact column names required)

Package,Version,CVE_ID,Severity,CVSS_Score,Fixed_Version,Title,Url

Complete, Production-Ready Script

import json, csv, sys

def get_cvss_score(vuln):
    """Extract CVSS v3 score: NVD > GHSA > RedHat > N/A"""
    cvss = vuln.get('CVSS', {})
    if not isinstance(cvss, dict):
        return 'N/A'
    for source in ['nvd', 'ghsa', 'redhat']:
        entry = cvss.get(source, {})
        if isinstance(entry, dict):
            score = entry.get('V3Score')
            if score is not None and isinstance(score, (int, float)):
                return score
    return 'N/A'

def generate_csv(json_input, csv_output, severities=('HIGH', 'CRITICAL')):
    with open(json_input, encoding='utf-8') as f:
        data = json.load(f)

    records = []
    seen = set()  # Deduplicate by (package, version, CVE)

    for result in data.get('Results', []):
        for vuln in (result.get('Vulnerabilities') or []):  # Handle None
            severity = vuln.get('Severity', '')
            if severity not in severities:
                continue

            key = (vuln.get('PkgName'), vuln.get('InstalledVersion'), vuln.get('VulnerabilityID'))
            if key in seen:
                continue
            seen.add(key)

            records.append({
                'Package': vuln.get('PkgName') or 'N/A',
                'Version': vuln.get('InstalledVersion') or 'N/A',
                'CVE_ID': vuln.get('VulnerabilityID') or 'N/A',
                'Severity': severity,
                'CVSS_Score': get_cvss_score(vuln),
                'Fixed_Version': vuln.get('FixedVersion') or 'N/A',  # handles None AND ""
                'Title': vuln.get('Title') or 'N/A',
                'Url': vuln.get('PrimaryURL') or 'N/A',
            })

    headers = ['Package', 'Version', 'CVE_ID', 'Severity',
               'CVSS_Score', 'Fixed_Version', 'Title', 'Url']

    with open(csv_output, 'w', newline='', encoding='utf-8') as f:
        writer = csv.DictWriter(f, fieldnames=headers)
        writer.writeheader()
        writer.writerows(records)

    print(f"[+] Wrote {len(records)} HIGH/CRITICAL records to {csv_output}")
    return records

if __name__ == '__main__':
    generate_csv('/root/trivy_report.json', '/root/security_audit.csv')

Key Improvements Over Round 1

1. Deduplication: Use a seen set to avoid duplicate (pkg, version, CVE) entries
2. Null safety: result.get('Vulnerabilities') or [] handles None Vulnerabilities
3. Empty string fix: vuln.get('FixedVersion') or 'N/A' catches both None and ""
4. Type safety: Added isinstance checks in CVSS extraction
5. Encoding: Always use encoding='utf-8' for both read and write

Field Mapping Reference

CSV Column	Trivy JSON Field	Notes
Package	PkgName	Package name
Version	InstalledVersion	Installed version string
CVE_ID	VulnerabilityID	CVE/GHSA identifier
Severity	Severity	HIGH or CRITICAL (filtered)
CVSS_Score	CVSS.{source}.V3Score	Via priority extraction
Fixed_Version	FixedVersion	Empty/None → 'N/A'
Title	Title	Short description
Url	PrimaryURL	AVD/NVD reference link