Arbitrary file overwrite in Documentum Administrator / Documentum Webtop

Advisory Content :

The following pre-advisory is also available in PDF format for download
at:
http://www.cybsec.com/vuln/CYBSEC-Security_Advisory_Documentum_dmclTrace
_Arbitrary_file_overwrite.pdf

Advisory Name: Arbitrary file overwrite in Documentum Administrator /
Documentum Webtop
==============

Vulnerability Class: Arbitrary file overwrite
====================

Release Date: 2008-02-05
=============

Affected Applications:
======================
* Documentum Administrator version 5.3.0.313
* Documentum Webtop version version 5.3.0.317
* Other applications and versions may also be affected

Affected Platforms:
===================
* Windows 2003 Server - Standard Edition
* Apache Tomcat 5.0.28
* Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_05-b04)
* Other platforms may also be affected

Local / Remote: Remote
===============

Severity: High
=========

Author: Pablo Gaston Milano
=======

Vendor Status: Confirmed. Updates Released.
==============

Reference to Vulnerability Disclosure Policy:
http://www.cybsec.com/vulnerability_policy.pdf
=============================================

Vulnerability Description:
==========================

Documentum Administrator and Documentum Webtop were found to be vulnerable
to arbitrary file overwrite, by specifying an arbitrary filename attribute
to the ?dmclTrace.jsp? page. It is also possible to control the contents of
the overwritten file, which could allow the remote upload and execution of
arbitrary code in the context of the user running the application server.

Impact:
=======
Exploitation of this vulnerability would allow an attacker to overwrite
arbitrary files on the server filesystem. This could be used to upload and
execute arbitrary code in the context of the user running the application
server.

Solution:
=========
The vendor reported that this vulnerability was fixed in SP4 and later.

Vendor Response:
================
. 2007-12-17: CYBSEC contacted Vendor.
. 2007-12-17: Vendor first response.
. 2008-01-04: Vendor confirmed vuln is fixed in latest SP.
. 2008-01-30: CYBSEC informed the vendor the disclosure plan.
. 2008-02-05: Advisory Public Disclosure.

Contact Information:
====================
For more information regarding the vulnerability feel free to contact the
researcher at pmilano <at> cybsec <dot> com.

About CYBSEC S.A. Security Systems
-----------------------------------

Since 1996 CYBSEC S.A. is devoted exclusively to provide professional
services specialized in Computer Security. More than 150 clients around
the
globe validate our quality and professionalism.
To keep objectivity, CYBSEC S.A. does not represent, neither sell, nor is
associated with other software and/or hardware provider companies.
Our services are strictly focused on Information Security, protecting our
clients from emerging security threats, mantaining their IT deployments
available, safe, and reliable.
Beyond professional services, CYBSEC is continuosly researching new defense
and attack techiniques and contributing with the security community with
high quality information exchange.

For more information, please visit www.cybsec.com

(c) 2008 - CYBSEC S.A. Security Systems

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Arbitrary file overwrite in Documentum Administrator / Documentum Webtop