CMS Balitbang 3.3 Arbitary File Upload Vulnerability

[eidelweiss@xxxxxxxxxxxxxxx]

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    CMS Balitbang v.3.3 Arbitary file upload vulnerability
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Software:   CMS Balitbang
Vendor:     www.kajianwebsite.org
Vuln Type:  Arbitary file upload
Download link:  http://www.kajianwebsite.org/download/CMS%20versi%203.3.zip
Author:     eidelweiss
contact:    eidelweiss[at]windowslive[dot]com
Home:       www.eidelweiss.info
Gratz:  xx_user , kuris , and YOU !!!
   
References: 
http://eidelweiss-advisories.blogspot.com/2011/03/cms-balitbang-v-33-arbitary-file-upload.html
   
   
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    description:
CMS balitbang is content management system for educational website.
Namanya sih bukan CMS Balitbang, cuma berhubungan CMS ini dikembangin oleh 
Balitbang Kemendiknas makanya lebih terkenal dengan sebutan CMS Balitbang. CMS 
Balitbang ini ditujukan untuk kepentingan dunia pendidikan Indonesia terutama 
untuk sekolah sekolah yang belum punya Website Sekolahnya. Harapannya kedepan 
Balitbang menginginkan semua sekolah di Indonesia punya Sistem Informasi 
Berbasis Website yang bisa diakses oleh banyak orang.
 
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    Vulnerability details:
 
CMS Balitbang 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:
 
    /webtemp/functions/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'] = 'http://localhost/webtemp/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
 
---
 
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//webtemp/functions/editor/filemanager/connectors/uploadtest.html    
// upload your file here
    or
[!] 
http://host/path_to_CMSBalitbang/functions/editor/filemanager/connectors/uploadtest.html
 
    your shell or file will be placed here
 
[!] http://localhost/webtemp/userfiles/ <= here
   
   
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    Nothing Impossible In This World Even Nobody`s Perfect
   
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