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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1992 Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP appliance Security Update 9 June 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Citrix ADC Citrix Gateway Citrix SD-WAN WANOP Publisher: Citrix Operating System: Network Appliance Impact/Access: Access Privileged Data -- Remote with User Interaction Denial of Service -- Remote/Unauthenticated Provide Misleading Information -- Remote with User Interaction Unauthorised Access -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2020-8300 CVE-2020-8299 Original Bulletin: https://support.citrix.com/article/CTX297155 - --------------------------BEGIN INCLUDED TEXT-------------------- Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP appliance Security Update Reference: CTX297155 Category : High Created : 08 June 2021 Modified : 08 June 2021 Applicable Products o Citrix ADC o Citrix Gateway o Citrix SD-WAN WANOP Description of Problem Multiple vulnerabilities have been discovered in Citrix ADC (formerly known as NetScaler ADC), Citrix Gateway (formerly known as NetScaler Gateway) and Citrix SD-WAN WANOP appliance models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities, if exploited, could result in the following security issues: +-------------+------------------+------------+----------+--------------------+ |CVE-ID |Description |CWE |Affected |Pre-conditions | | | | |Products | | +-------------+------------------+------------+----------+--------------------+ | | | |Citrix | | | |Network-based |CWE-400: |ADC, |The attacker machine| | |denial-of-service |Uncontrolled|Citrix |must be in the same | |CVE-2020-8299|from within the |Resource |Gateway, |Layer 2 network | | |same Layer 2 |Consumption |Citrix |segment as the | | |network segment | |SD-WAN |vulnerable appliance| | | | |WANOP | | +-------------+------------------+------------+----------+--------------------+ | |SAML | | | | | |authentication |CWE-284: |Citrix |Citrix ADC or Citrix| |CVE-2020-8300|hijack through a |Improper |ADC, |Gateway must be | | |phishing attack to|access |Citrix |configured as a SAML| | |steal a valid user|control |Gateway |SP or a SAML IdP | | |session | | | | +-------------+------------------+------------+----------+--------------------+ The following supported versions of Citrix ADC, Citrix Gateway and Citrix SD-WAN WANOP are affected by CVE-2020-8299: o Citrix ADC and Citrix Gateway 13.0 before 13.0-76.29 o Citrix ADC and Citrix Gateway 12.1 before 12.1-61.18 o Citrix ADC and NetScaler Gateway 11.1 before 65.20 o Citrix ADC 12.1-FIPS before 12.1-55.238 o Citrix SD-WAN WANOP 11.4 before 11.4.0 o Citrix SD-WAN WANOP 11.3 before 11.3.2 o Citrix SD-WAN WANOP 11.3 before 11.3.1a o Citrix SD-WAN WANOP 11.2 before 11.2.3a o Citrix SD-WAN WANOP 11.1 before 11.1.2c o Citrix SD-WAN WANOP 10.2 before 10.2.9a The following supported versions of Citrix ADC and Citrix Gateway are affected by CVE-2020-8300: o Citrix ADC and Citrix Gateway 13.0. before 13.0-82.41 o Citrix ADC and Citrix Gateway 12.1 before 12.1-62.23 o Citrix ADC and NetScaler Gateway 11.1 before 11.1-65.20 o Citrix ADC 12.1-FIPS before 12.1-55.238 These issues have already been addressed in Citrix-managed cloud services such as Citrix Gateway Service and Citrix Secure Workspace Access. Customers using Citrix-managed services do not need to take any additional action. What Customers Should Do The following supported versions of Citrix ADC, Citrix Gateway, and Citrix SD-WAN WANOP address CVE-2020-8299, a Medium severity vulnerability. o Citrix ADC and Citrix Gateway 13.0-76.29 and later releases of 13.0 o Citrix ADC and Citrix Gateway 12.1-61.18 and later releases of 12.1 o Citrix ADC and NetScaler Gateway 11.1-65.20 and later releases of 11.1 o Citrix ADC 12.1-FIPS 12.1-55.238 and later releases of 12.1-FIPS o Citrix SD-WAN WANOP 11.4.0 and later releases of 11.4 o Citrix SD-WAN WANOP 11.3.2 and later releases of 11.3 o Citrix SD-WAN WANOP 11.3.1a and later releases of 11.3 o Citrix SD-WAN WANOP 11.2.3a and later releases of 11.2 o Citrix SD-WAN WANOP 11.1.2c and later releases of 11.1 o Citrix SD-WAN WANOP 10.2.9a and later releases of 10.2 The following supported versions of Citrix ADC and Citrix Gateway address CVE-2020-8300, a High severity vulnerability. o Citrix ADC and Citrix Gateway 13.0-82.41 and later releases of 13.0 o Citrix ADC and NetScaler Gateway ADC 12.1-62.23 and later releases of 12.1 o Citrix ADC and NetScaler Gateway 11.1-65.20 and later releases of 11.1 o Citrix ADC 12.1-FIPS 12.1-55.238 and later releases of 12.1-FIPS NOTE: In addition, upon upgrading to the fixed version, customers must modify the device configuration to resolve CVE-2020-8300. See Citrix Application Delivery Controller and Citrix Gateway - SAML Configuration Reference Guide for details. Citrix strongly recommends that affected customers install relevant updates as soon as possible. Acknowledgements Citrix would like to thank ChenNan of Chaitin Security Research Lab, Wolfgang Ettlinger and Marc Nimmerrichter of Certitude Consulting 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 2021-06-08 Formatting Corrections - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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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