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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
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