PivotX 2.3.11: Code Execution

Date: 2016-03-15 13:48:41

1. Introduction

2. Overview

PivotX is a CMS for blogging written in PHP. In version 2.3.11, it is vulnerable to code execution by authenticated users because it does not check the extension of files when renaming them.

3. Details

Description

CVSS: High 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

The file upload functionality checks file extensions when uploading files to prevent the uploading of malicious files such as PHP files. However, the rename function does not check the extension of the new filename, leading to code execution.

An account in the advanced users, admins, or superadmins role is required to upload files.

Proof of Concept

1. Upload an image file containing PHP code with a valid extension such as png 2. rename it so it has a PHP extension: http://localhost/pivotx_latest/pivotx/index.php?page=media&file=imageshell.png&pivotxsession=ovyyn4ob2jc5ym92&answer=shell.php

4. Solution

This issue was not fixed by the vendor.

5. Report Timeline