WordPress Top-10 2.4.2 SQL Injection

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DefenseCode ThunderScan SAST Advisory: WordPress Top-10 Plugin  
SQL Injection Security Vulnerability  
  
  
Advisory ID: DC-2017-12-003  
Advisory Title: WordPress Top-10 Plugin SQL Injection Security Vulnerability  
Advisory URL: http://www.defensecode.com/advisories.php  
Software: WordPress Top-10 plugin  
Language: PHP  
Version: 2.4.2 and below  
Vendor Status: Vendor contacted, update released  
Release Date: 2017/12/13  
Risk: High  
  
  
  
1. General Overview  
===================  
During the security audit of Top-10 plugin for WordPress CMS, security  
vulnerability was discovered using DefenseCode ThunderScan application  
source code security analysis platform.  
  
More information about ThunderScan is available at URL:  
http://www.defensecode.com  
  
  
2. Software Overview  
====================  
According to the plugin developers, Top-10 WordPress plugin can count  
daily and total visits per post and display the most popular posts  
based on the number of views.  
  
According to wordpress.org, it has more than 30,000 active installs.  
  
Homepage:  
https://wordpress.org/plugins/Top-10/  
https://webberzone.com/plugins/Top-10/  
  
  
3. Vulnerability Description  
============================  
During the security analysis, ThunderScan discovered SQL injection  
vulnerability in Top-10 WordPress plugin.  
  
The easiest way to reproduce the vulnerability is to visit the  
provided URL while being logged in as administrator or another user  
that is authorized to access the plugin settings page. Users that do  
not have full administrative privileges could abuse the database  
access the vulnerability provides to either escalate their privileges  
or obtain and modify database contents they were not supposed to be  
able to.  
  
3.1 SQL injection  
Vulnerable Function: $wpdb->get_results( $sql, 'ARRAY_A' )  
Vulnerable Variable: $_REQUEST['orderby']  
File: Top-10\admin\class-stats.php  
---------  
111 $orderby = sanitize_text_field( wp_unslash( $_REQUEST['orderby']  
) );  
...  
134 $sql = "SELECT $fields FROM {$table_name} $join WHERE 1=1 $where  
$groupby $orderby $limits";  
...  
136 $result = $wpdb->get_results( $sql, 'ARRAY_A' );  
---------  
  
  
4. Solution  
===========  
After the vulnerability was reported the vendor resolved the security  
issues. All users are strongly advised to update WordPress Top-10  
plugin to the latest available version.  
  
  
5. Credits  
==========  
Discovered by Neven Biruski using DefenseCode ThunderScan source code  
security analyzer.  
  
  
6. Disclosure Timeline  
======================  
2017/04/04 Vendor contacted  
2017/04/05 Vendor responded  
2017/04/07 Update released  
2017/12/13 Advisory released to the public  
  
  
7. About DefenseCode  
====================  
DefenseCode L.L.C. delivers products and services designed to analyze  
and test web, desktop and mobile applications for security  
vulnerabilities.  
  
DefenseCode ThunderScan is a SAST (Static Application Security  
Testing, WhiteBox Testing) solution for performing extensive security  
audits of application source code. ThunderScan SAST performs fast and  
accurate analyses of large and complex source code projects delivering  
precise results and low false positive rate.  
  
DefenseCode WebScanner is a DAST (Dynamic Application Security  
Testing, BlackBox Testing) solution for comprehensive security audits  
of active web applications. WebScanner will test a website's security  
by carrying out a large number of attacks using the most advanced  
techniques, just as a real attacker would.  
  
Subscribe for free software trial on our website  
http://www.defensecode.com/ .  
  
E-mail: defensecode[at]defensecode.com  
  
Website: http://www.defensecode.com  
Twitter: https://twitter.com/DefenseCode/  
  
  
  
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