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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1993 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: https://support.citrix.com/article/CTX316690 - --------------------------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 installer. 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. Acknowledgements 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 . Disclaimer 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 time. Changelog Date Change 2021-06-08 Initial Publication - --------------------------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: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane 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). 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