Hash: SHA1

             AUSCERT External Security Bulletin Redistribution

   Vulnerability in XenDesktop 7.0 upgrade could result in policy bypass
                              24 October 2013


        AusCERT Security Bulletin Summary

Product:           Citrix XenDesktop
Publisher:         Citrix
Operating System:  Windows
Impact/Access:     Reduced Security -- Unknown/Unspecified
Resolution:        Mitigation
CVE Names:         CVE-2013-6077  

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

Vulnerability in XenDesktop 7.0 upgrade could result in policy bypass

Document ID: CTX138627
Created On: Oct 22, 2013
Updated On: Oct 22, 2013
Average Rating: 5 (1 ratings)

View products this document applies to link to products this document applies 

Severity: Medium

Description of Problem

A vulnerability has been identified in Citrix XenDesktop 7.0 that could prevent
policy rules from being correctly applied following an upgrade from earlier 
versions of Citrix XenDesktop.

This vulnerability affects deployments of Citrix XenDesktop that have been 
upgraded from version 5.6 or earlier to version 7.0. Customers upgrading from
Citrix XenDesktop version 5.6 or earlier directly to Citrix XenDesktop version
7.1 are not affected by this vulnerability.

This vulnerability has been assigned the following CVE number:

- - CVE-2013-6077: Failure to correctly apply policy rule permissions following 
upgrade of Citrix XenDesktop from version 5.x to version 7.0.

What Customers Should Do

Customers that have upgraded from Citrix XenDesktop version 5.6 or earlier to 
Citrix XenDesktop version 7.0 are advised to verify that that their policy 
rules have the correct permissions. Further information on how to verify and 
reset policy rule permissions can be found in the Citrix Knowledge Center and 
the location below:

CTX139335 - How to Use PowerShell to Reset BrokerAccessPolicyRule Settings for 

Customers currently planning upgrades from Citrix XenDesktop 5.6 or earlier may
wish to consider upgrading to version 7.1 directly.

What Citrix Is Doing

Citrix is notifying customers and channel partners about this potential 
security issue. This article is also available from the Citrix Knowledge Center
at http://support.citrix.com/.

Obtaining Support on This Issue

If you require technical assistance with this issue, please contact Citrix 
Technical Support. Contact details for Citrix Technical Support are available
at http://www.citrix.com/site/ss/supportContacts.asp.

Reporting Security Vulnerabilities to Citrix

Citrix welcomes input regarding the security of its products and considers any
and all potential vulnerabilities seriously. If you would like to report a 
security issue to Citrix, please compose an e-mail to secure@citrix.com 
stating the exact version of the product in which the vulnerability was found 
and the steps needed to reproduce the vulnerability.

This document applies to:

XenDesktop 7

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:


Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
Comment: http://www.auscert.org.au/render.html?it=1967