Bugtraq: LightBlog Remote File Upload Vulnerability

[omnipresent () email it]

 LightBlog 9.5 - REMOTE FILE UPLOAD VULNERABILITY
by Omni
1) Infos
---------
Date : 2008-01-30
Product : LightBlog
Version : v 9.5
Vendor : http://www.publicwarehouse.co.uk/
Vendor Status :
2008-01-31 Informed!
2008-01-31 Patch received from vendor!
2008-02-01 Published!


Description : Lightblog provides webmasters who don't have SQL databases with a fully featured blogging system. Using
text files to store data, there's no need for complicated installation procedures or a potentially pricey
hosting bill.
Dork : "Powered by LightBlog" - Powered by LightBlog
Source : omnipresent - omni - http://omni.netsons.org

E-mail : omnipresent[at]NOSPAMemail[dot]it - omni[at]NOSPAMplayhack[dot]
Team : Playhack.net Security


2) Security Issues
-------------------


--- [ Remote File Upload Vulnerability ] ---
===============================================
A remote file upload vulnerability is present in LightBlog version 9.5.
Users without permissions are able to upload any kind of files, also .php; so the attacker can upload their own remote 
PHP
shell.
The file vulnerable is: cp_upload_image.php, and you can find it under the root directory of the blog uploaded. (shown
in the section PoC).


--- [ PoC ] ---
===============
http://localhost/light/cp_upload_image.php
Just look for your PHP shell, upload it (shell.php) and then use it:
http://localhost/light/images/shell.php


--- [ Patch ] ---
===============
- Edit the source code.
- use CHMOD
- Delete cp_upload_image.php
- Use the vendor patch.