Credit Card data disclosure in CitrusDB

[Maximillian Dornseif <dornseif () informatik rwth-aachen de>]

Credit Card data disclosure in CitrusDB

A group of students at our lab called  RedTeam found an information
disclosure vulnerability in CitrusDB which can result in disclosure of
credit card information.

Details
=======

Product: CitrusDB
Affected Version: <= 0.3.5
Immune Version: >=0.3.6
OS affected: all
Security-Risk: very high
Remote-Exploit: yes
Vendor-URL: http://www.citrusdb.org/
Vendor-Status: informed, new version released
Advisory-URL:
http://tsyklon.informatik.rwth-aachen.de/redteam/rt-sa-2005-001
CVE: CAN-2005-0229

Introduction
============

Description from vendor:
"CitrusDB is an open source customer database application that uses PHP
and a database backend (currently MySQL) to keep track of customer
information, services, products, billing, and customer service
information."

CitrusDB uses a textfile to temporarily store credit card information.
This textfile is located in the web tree via a static URL and thus
accessible to third parties. It also isn't deleted after processing
resulting in a big window of opportunity for an attacker.

More Details
============

The URL to the textfile "<path to CitrusDB>/io/newfile.txt" is stated
in the files "tools/uploadcc.php" and "tools/importcc.php". The <path
to CitrusDB> is always known while surfing. Therefor also "newfile.txt"
containing the credit card data can be easily found and accessed. This
leads to disclosure of the confidential data stored in that file.

Proof of Concept
================

Add "/citrusdb/io/newfile.txt" to the URL of a site running CitrusDB
default installation.

Workaround
==========

Either deny access to the file using access restriction features of
your webserver or change CitrusDB to use a file outside document root
and not accessible via http.

Fix
===

Update to CitrusDB version 0.3.6 or higher and set the $path_to_ccfile
in the configuration to a path not accessible via http

Security Risk
=============

The software is still beta, so it probably isn't widely used. To sites
running CitrusDB, the risk is very high because credit card data is
concerned. Disclosure of credit card data can lead to serious liability
issues for the site.

Vendor Status
=============

2005-01-28 Email sent to author
2005-01-28 Answer from author received, new version released

RedTeam
=======

RedTeam is a penetration testing group working at the Laboratory for
Dependable Distributed Systems at RWTH-Aachen University. You can find
more Information on the RedTeam Project at
http://tsyklon.informatik.rwth-aachen.de/redteam/

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html