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WordPress Appointment Booking Calendar 1.1.23 Shortcode SQL Injection

WordPress Appointment Booking Calendar 1.1.23 Shortcode SQL Injection
Posted Jan 26, 2016
Authored by Joaquin Ramirez Martinez

WordPress Appointment Booking Calendar plugin versions 1.1.23 and below suffer from a shortcode remote SQL injection vulnerability.

tags | exploit, remote, sql injection
MD5 | 43a554bb1fe05c73f363f9e83707cf5b

WordPress Appointment Booking Calendar 1.1.23 Shortcode SQL Injection

Change Mirror Download
# Exploit Title: WordPress appointment-booking-calendar <=1.1.23 - Shortcode SQL injection
# Date: 2016-01-24
# Google Dork: Index of /wordpress/wp-content/plugins/appointment-booking-calendar/
# Exploit Author: Joaquin Ramirez Martinez [i0 security-lab]
# Software Link: http://wordpress.dwbooster.com/calendars/booking-calendar-contact-form
# Vendor: CodePeople.net
# Vebdor URI: http://codepeople.net
# Version: 1.1.23
# OWASP Top10: A1-Injection
# Tested on: windows 10 + firefox + sqlmap 1.0.

===================
PRODUCT DESCRIPTION
===================
"Appointment Booking Calendar is a plugin for **accepting online bookings** from a set of **available time-slots in
a calendar**. The booking form is linked to a **PayPal** payment process.

You can use it to accept bookings for medical consultation, classrooms, events, transportation and other activities
where a specific time from a defined set must be selected, allowing you to define the maximum number of bookings
that can be accepted for each time-slot."

(copy of readme file)


======================
EXPLOITATION TECHNIQUE
======================
remote

==============
SEVERITY LEVEL
==============

critical

================================
TECHNICAL DETAILS && DESCRIPTION
================================

A SQL injection flaw was discovered within the latest WordPress appointment-booking-calendar plugin version 1.1.20.

The flaw was found in the function to run when a shortcode is found within a page in the wordpress site.
The function mentioned use unsanitized attributes and a user authenticated as a editor, autor or
administrator (compromised) can exploit this vulnerability by adding crafted shortcodes on a page or post.

The security risk of SQL injection vulnerabilities are extremely because by using this type of flaw,
an attacker can compromise the entire web server.

================
PROOF OF CONCEPT
================

An attacker(editor, autor or administrator) can embed into a post the following shortcode...

[CPABC_APPOINTMENT_LIST calendar="-1 or sleep(10)#"]

... and the post will take ten seconds loading.

==========
CREDITS
==========

Vulnerability discovered by:
Joaquin Ramirez Martinez [i0 security-lab]
strparser[at]gmail[dot]com
https://www.facebook.com/I0-security-lab-524954460988147/
https://www.youtube.com/channel/UCe1Ex2Y0wD71I_cet-Wsu7Q


========
TIMELINE
========

2016-01-08 vulnerability discovered
2016-01-24 reported to vendor
2016-01-25 released appointment-booking-calendar 1.1.24
2016-01-26 full disclosure

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