CubeCart™ 3.0.3 multiple variable Cross site scripting

Wednesday, September 28, 2005
################################################
CubeCart™ 3.0.3 multiple variable Cross site scripting
Vendor url: www.cubecart.com
bug report:http://bugs.cubecart.com/?do=details&id=363
Advisore:http://lostmon.blogspot.com/2005/09/
cubecart-303-multiple-variable-cross.html
vendor confirmed: yes exploit avalable: yes
Fix available: yes
OSVDB ID:19860,>19861
Securitytracker:1014984
BID:14962
################################################

CubeCart contains a flaw that allows a remote cross site scripting
attack.This flaw exists because the application does not validate
some variables upon submission to cart.php and index.php scripts.
This could allow a user to create a specially crafted URL that
would execute arbitrary code in a user's browser within the trust
relationship between the browser and the server,leading to a
loss of integrity.

###############
VERSIONS
###############

CubeCart™ 3.0.3 vulnerable
CubeCart™ 3.0.4 not vulnerable

#################
Timeline
#################

Discovered: 24 sep 2005
vendor notify: 24 sep 2005
Vendor response:26 sep 2005
Solution: 28 sep 2005
Disclosure:24 sep 2005
Public disclosure: 28 sep 2005

###############
Examples:
###############

http://victim]/cc3/cart.php?act=reg&redir=L3NpdGUvZGVt
by9jYzMvaW5kZXgucGhwP3NlYXJjaFN0cj0lMjIlM0UlM0NzY3JpcH
QlM0VhbGVydCUyOCUyOSUzQyUyRnNjcmlwdCUzRSZhbXA7YWN0PXZpZ
XdDYXQmYW1wO1N1Ym1pdD1Hbw==[XSS-CODE]

http://[victim]/cc3/cart.php?act=reg&redir=[XSS-CODE]


http://[victim]cc3/index.php?searchStr=%3D%22%3E%3Cscript
%3Ealert%28document.cookie%29%3C%2Fscript%3E&act=viewCat
&Submit=Go

http://[victim]cc3/index.php?act=login&redir=L3NpdG
UvZGVtby9jYzMvaW5kZXgucGhwP2FjdD12aWV3RG9jJmFtcDtkb
2NJZD0x[XSS-CODE]

#############
SOLUTION
#############

The vendor has release a fix.
and the follow URI are available for download
the latest version of CubeCart.

http://www.cubecart.com/site/forums/index.php?download=222

Thnx to all CubeCart Tem , they make a very Good work !!!

################################################
MANUAL FIX
################################################
///////////////////////////////////////
// 1. Open: /includes/content/reg.inc.php
////////

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find at around line 123:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$redir = base64_decode($_GET['redir']);

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Replace with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$redir = base64_decode(treatGet($_GET['redir']));

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find at around line 170:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$reg->assign("VAL_ACTION","cart.php?act=reg&
redir=".$_GET['redir']);

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Replace with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$reg->assign("VAL_ACTION","cart.php?act=reg&
redir=".treatGet($_GET['redir']));

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Save, close and upload this file.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


///////////////////////////////////////
// 2. Open: /includes/content/login.inc.php
////////


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find at around line 55:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

header("Location: ".str_replace("&","&",
base64_decode($_GET['redir'])));

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Replace with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

header("Location: ".str_replace("&","&",
base64_decode(treatGet($_GET['redir']))));

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find at around line 74:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$login->assign("VAL_SELF",$_GET['redir']);

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Replace with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$login->assign("VAL_SELF",treatGet($_GET['redir']));

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Save, close and upload this file.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


///////////////////////////////////////
// 3. Open: /includes/boxes/searchForm.inc.php
////////

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find at around line 40:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$box_content->assign("SEARCHSTR",$_GET['searchStr']);

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Replace with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$box_content->assign("SEARCHSTR",treatGet($_GET['searchStr']));

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Save, close and upload this file.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


///////////////////////////////////////
// 4. Open: /includes/content/viewCat.inc.php
////////

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find at around line 108:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$searchwords = split ( "[ ,]", $_GET['searchStr']);

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Replace with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$searchwords = split ( "[ ,]", treatGet($_GET['searchStr']));

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find at around line 308:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$view_cat->assign("TXT_NO_PRODUCTS",$lang['front']['viewCat']['no_products_match']." ".$_GET['searchStr']);

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Replace with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$view_cat->assign("TXT_NO_PRODUCTS",$lang['front']['viewCat']['no_products_match']." ".treatGet($_GET['searchStr']));

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Save, close and upload this file.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


///////////////////////////////////////
// 5. Open: /includes/functions.inc.php
////////


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At around line 25 find:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

| functions.inc.php
| ========================================
| Core Frontend Functions
+----------------------------------------------
*/

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Directly under this add:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

//////////////////////////////////
// treat GET vars stop XSS
////////
function treatGet($text){

$text = preg_replace("/(\)/si", "", "$text");
$text = strip_tags($text);
$text = str_replace(array("'","\"",">","<","\\"), "", $text);
return $text;

}



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
At around line 384 find:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

function currentPage(){

$currentPage = $_SERVER['PHP_SELF'];

if (isset($_SERVER['QUERY_STRING'])) {

$currentPage .= "?" . htmlentities($_SERVER['QUERY_STRING']);

}

return $currentPage;

}


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Replace this with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

function currentPage(){

$currentPage = $_SERVER['PHP_SELF'];

if (isset($_SERVER['QUERY_STRING'])) {

$currentPage .= "?" . htmlentities(treatGet($_SERVER['QUERY_STRING']));

}

return $currentPage;

}

///////////////////////////////////////
// 6. Open: /includes/ini.inc.php
////////

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Find at around line 108:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$ini['ver'] = '3.0.3';

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Replace with:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

$ini['ver'] = '3.0.4';

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Save, close and upload this file.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// end of manual fix :O)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

##################### €nd ########################

Thnx to estrella to be my ligth
Thnx to all manglers of http://www.osvdb.org

--
atentamente:
Lostmon (lostmon@gmail.com)
Web-Blog: http://lostmon.blogspot.com/
--
La curiosidad es lo que hace mover la mente....

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