==================================================================== CERT-Renater Note d'Information No. 2021/VULN312 _____________________________________________________________________ DATE : 09/06/2021 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running Citrix ADC, Citrix Gateway, Citrix SD-WAN WANOP. ===================================================================== https://support.citrix.com/article/CTX297155 _____________________________________________________________________ CTX297155 Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP appliance Security Update Security Bulletin | High | Created: 08 Jun 2021 | Modified: 08 Jun 2021 Applicable Products Citrix ADC Citrix Gateway 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 Products Pre-conditions CVE-2020-8299 Network-based denial-of-service from within the same Layer 2 network segment CWE-400: Uncontrolled Resource Consumption Citrix ADC, Citrix Gateway, Citrix SD-WAN WANOP The attacker machine must be in the same Layer 2 network segment as the vulnerable appliance CVE-2020-8300 SAML authentication hijack through a phishing attack to steal a valid user session CWE-284: Improper access control Citrix ADC, Citrix Gateway Citrix ADC or Citrix Gateway must be configured as a SAML SP or a SAML IdP The following supported versions of Citrix ADC, Citrix Gateway and Citrix SD-WAN WANOP are affected by CVE-2020-8299: Citrix ADC and Citrix Gateway 13.0 before 13.0-76.29 Citrix ADC and Citrix Gateway 12.1 before 12.1-61.18 Citrix ADC and NetScaler Gateway 11.1 before 65.20 Citrix ADC 12.1-FIPS before 12.1-55.238 Citrix SD-WAN WANOP 11.4 before 11.4.0 Citrix SD-WAN WANOP 11.3 before 11.3.2 Citrix SD-WAN WANOP 11.3 before 11.3.1a Citrix SD-WAN WANOP 11.2 before 11.2.3a Citrix SD-WAN WANOP 11.1 before 11.1.2c 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: Citrix ADC and Citrix Gateway 13.0. before 13.0-82.41 Citrix ADC and Citrix Gateway 12.1 before 12.1-62.23 Citrix ADC and NetScaler Gateway 11.1 before 11.1-65.20 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. Citrix ADC and Citrix Gateway 13.0-76.29 and later releases of 13.0 Citrix ADC and Citrix Gateway 12.1-61.18 and later releases of 12.1 Citrix ADC and NetScaler Gateway 11.1-65.20 and later releases of 11.1 Citrix ADC 12.1-FIPS 12.1-55.238 and later releases of 12.1-FIPS Citrix SD-WAN WANOP 11.4.0 and later releases of 11.4 Citrix SD-WAN WANOP 11.3.2 and later releases of 11.3 Citrix SD-WAN WANOP 11.3.1a and later releases of 11.3 Citrix SD-WAN WANOP 11.2.3a and later releases of 11.2 Citrix SD-WAN WANOP 11.1.2c and later releases of 11.1 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. Citrix ADC and Citrix Gateway 13.0-82.41 and later releases of 13.0 Citrix ADC and NetScaler Gateway ADC 12.1-62.23 and later releases of 12.1 Citrix ADC and NetScaler Gateway 11.1-65.20 and later releases of 11.1 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 ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================