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             AUSCERT External Security Bulletin Redistribution

                  Citrix Cloud Connector Security Update
                                9 June 2021


        AusCERT Security Bulletin Summary

Product:           Citrix Virtual Apps and Desktops
                   Citrix Cloud
Publisher:         Citrix
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data -- Existing Account
                   Unauthorised Access    -- Existing Account
Resolution:        Mitigation
CVE Names:         CVE-2021-22914  

Original Bulletin: 

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

Citrix Cloud Connector Security Update

Reference: CTX316690
Category : Medium
Created  : 08 June 2021
Modified : 08 June 2021

Applicable Products

  o Citrix Virtual Apps and Desktops
  o Citrix Cloud

Description of Problem

A vulnerability has been identified in Citrix Cloud Connector that may result
in sensitive information being stored in the Citrix Cloud Connector
installation log files which, if exploited, could allow access to a customer's
Citrix Cloud environment.

|CVE ID        |Description    |Vulnerability  |Pre-conditions                |
|              |               |Type           |                              |
|              |Sensitive      |CWE-922:       |Citrix Cloud connector must   |
|              |information    |Insecure       |have been installed by passing|
|CVE-2021-22914|stored in      |Storage of     |parameters to the command line|
|              |installation   |Sensitive      |installer.                    |
|              |logs           |Information    |                              |

This issue affects all versions of Citrix Cloud Connector which were installed
by passing secure client parameters for installation via the command line. The
issue does not affect Citrix Cloud Connector if it was installed using the
interactive installer or where a parameter file was used with the command-line

Mitigating Factors

As documented at https://docs.citrix.com/en-us/citrix-cloud/
citrix-cloud-resource-locations/citrix-cloud-connector/installation.html ,
installation log files are saved to the host running Citrix Cloud Connector
during installation. If customers have followed Citrix recommendation to use a
dedicated machine to run Citrix Cloud Connector, access to the installation
logs may therefore be restricted.

What Customers Should Do

Impacted customers are recommended to delete any Secure Clients from their
Citrix Cloud portal which have previously been used for command line
installation. Customers are also recommended to review the installation
documentation at https://docs.citrix.com/en-us/citrix-cloud/
citrix-cloud-resource-locations/citrix-cloud-connector/installation.html for
any future installation of Citrix Cloud Connector as this information has been
recently updated.


Citrix would like to thank Patrick van den Born of van den Born IT Consultancy
for working with us to protect Citrix customers.

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 https://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 https://www.citrix.com/support/open-a-support-case/ .

Reporting Security Vulnerabilities to Citrix

Citrix welcomes input regarding the security of its products and considers any
and all potential vulnerabilities seriously. For details on our vulnerability
response process and guidance on how to report security-related issues to
Citrix, please see the following webpage: https://www.citrix.com/about/
trust-center/vulnerability-process.html .


This document is provided on an "as is" basis and does not imply any kind of
guarantee or warranty, including the warranties of merchantability or fitness
for a particular use. Your use of the information on the document is at your
own risk. Citrix reserves the right to change or update this document at any


Date       Change
2021-06-08 Initial Publication

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