HTB22845: SQL Injection in cdnvote wordpress plugin

[advisory@xxxxxxxxxxx]

Vulnerability ID: HTB22845
Reference: 
http://www.htbridge.ch/advisory/sql_injection_in_cdnvote_wordpress_plugin.html
Product: cdnvote wordpress plugin
Vendor: Nakahira ( http://www.crossdrive.net/ ) 
Vulnerable Version: 0.4.1
Vendor Notification: 08 February 2011 
Vulnerability Type: SQL Injection
Risk level: High 
Credit: High-Tech Bridge SA - Ethical Hacking & Penetration Testing 
(http://www.htbridge.ch/) 

Vulnerability Details:
The vulnerability exists due to failure in the 
"/wp-content/plugins/cdnvote/cdnvote-post.php" script to properly sanitize 
user-supplied input in "cdnvote_post_id" and "cdnvote_point" variables.
Attacker can alter queries to the application SQL database, execute arbitrary 
queries to the database, compromise the application, access or modify sensitive 
data, or exploit various vulnerabilities in the underlying SQL database.

The following PoC is available:


<form action="http://[host]/wp-content/plugins/cdnvote/cdnvote-post.php"; 
method="post" name="main" >
<input type="hidden" name="cdnvote_post_id" value="SQL_CODE_HERE" />
<input type="hidden" name="cdnvote_point" value="OR_HERE" />
<input type="submit" value="Register" name="submit" />
</form>