full-disclosure - Advisory: Directory traversal in CitrusDB

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From: dornseif at informatik.rwth-aachen.de (Maximillian Dornseif)
Subject: Advisory: Directory traversal in CitrusDB

                   Advisory: Directory traversal in CitrusDB

RedTeam found a directory traversal vulnerability in CitrusDB which  
results
in inclusion of any accessible local .php file.

Details
=======

Product: CitrusDB
Affected Version: 0.3.6, probably <= 0.3.5, too
Immune Version: none (2005-02-03)
OS affected: all
Security-Risk: medium
Remote-Exploit: no
Vendor-URL: http://www.citrusdb.org
Vendor-Status: informed
Advisory-URL:  
http://tsyklon.informatik.rwth-aachen.de/redteam/advisories/rt-sa-2005 
-005
Advisory-Status: public
CVE: CAN-2005-0411  
(http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0411#)

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."

It is possible to include any local accessible .php file.

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

CitrusDB uses a wrapper script (./citrusdb/tools/index.php) to load  
different
modules and tools. The GET parameter "load"   specifies which file  
should be
included. With a relative path appended any .php file, that may be  
accessed
by the script, on the server may be included.

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

To include /tmp/exploit.php use:
http://<target>/citrusdb/tools/index.php?load=../../../../../../tmp/ 
exploit
Note: You need to be logged in to access this url.

Workaround
==========

n/a (2005-02-03)

Fix
===

n/a (2005-02-03)

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

The security risk is rated medium. An attacker needs to be able to  
create a
.php file on the local filesystem which is normally a high barrier but  
in
shared hosting enviroments this may be easier.

History
=======

2005-02-04 Email sent to author
2005-02-12 CVE number requested
2005-02-14 posted as CAN-2005-0411

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/

-- 
Maximillian Dornseif, Dipl. Jur., CISSP
Laboratory for Dependable Distributed Systems, RWTH Aachen University
Tel. +49 241 80-21431 - http://md.hudora.de/
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