2011/08/22

JagoanStore CMS Arbitary file upload vulnerability

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JagoanStore CMS Arbitary file upload vulnerability
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Software: JagoanStore CMS
Vendor: www.jagoanstore.com
Price: Rp.900.000 (IDR)
Vuln Type: Arbitary file upload

Author: eidelweiss
contact: eidelweiss[at]windowslive[dot]com
Home: www.eidelweiss-advisories.blogspot.com
Gratz: Devilzc0de, YOGYACARDERLINK, and YOU !!!

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description:
JagoanStore, adalah CMS untuk membuat toko online.
JagoanStore dibuat tidak hanya berdasar pada hal teknis pembuatan website, dalam pembuatannya juga di desain untuk membuat web toko online Anda mampu menjadi senjata ampuh bagi bisnis Anda.
Kini Anda tinggal fokus pada peningkatan penjualan online Anda.

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Vulnerability details:

JagoanStore CMS is using the old version of FCKeditor for upload file to all user.And all know the old version of FCKeditor have a vulnerability and attacker might be able to upload arbitrary files containing malicious PHP code due to multiple file extensions isn't properly checked.
Here is the code:

/manage/fckeditor/editor/filemanager/connectors/php/config.php

global $Config ;

// SECURITY: You must explicitly enable this "connector". (Set it to "true").
// WARNING: don't just set "$Config['Enabled'] = true ;", you must be sure that only
// authenticated users can access this file or use some kind of session checking.
$Config['Enabled'] = true ; // <= 1

---

// Path to user files relative to the document root.
$Config['UserFilesPath'] = '/userfiles/' ; // <= here is the path of attacker file or shell backdoor will be placed.

// following setting enabled.
$Config['ForceSingleExtension'] = true ; // <= 2

$Config['AllowedExtensions']['File'] = array('7z', 'aiff', 'asf', 'avi', 'bmp', 'csv', 'doc', 'fla', 'flv', 'gif', 'gz', 'gzip', 'jpeg', 'jpg', 'mid', 'mov', 'mp3', 'mp4', 'mpc', 'mpeg', 'mpg', 'ods', 'odt', 'pdf', 'png', 'ppt', 'pxd', 'qt', 'ram', 'rar', 'rm', 'rmi', 'rmvb', 'rtf', 'sdc', 'sitd', 'swf', 'sxc', 'sxw', 'tar', 'tgz', 'tif', 'tiff', 'txt', 'vsd', 'wav', 'wma', 'wmv', 'xls', 'xml', 'zip') ; // <= 3

$Config['AllowedExtensions']['Image'] = array('bmp','gif','jpeg','jpg','png') ;
---

with a default configuration of this script, an attacker might be able to upload arbitrary files containing malicious PHP code due to multiple file extensions isn't properly checked


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exploit & p0c

[!] http://host/manage/fckeditor/editor/filemanager/connectors/uploadtest.html // upload your file here
or
[!] http://host/path_to_CMSBalitbang/manage/fckeditor/editor/filemanager/connectors/uploadtest.html

your shell or file will be placed here

[!] http://localhost/userfiles/ <= here

Nb: You can use trick from pentesters.ir about FCKeditor :D
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Nothing Impossible In This World Even Nobody`s Perfect

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Time Line:
- Bug Reported to vendor
- Vendor Response and confirm the bug
- Vendor apply fix and patch
- Vendor awarded bounty (very kind vendor and this is first local vendor that really nice for me)


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