Description of Problem
Vulnerabilities have been discovered in Citrix Gateway and Citrix ADC, listed below. Note that only appliances that are operating as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) are affected by the first issue, which is rated as a Critical severity vulnerability.
CVE-ID |
Description |
CWE |
Affected Products |
Pre-conditions |
CVE-2022-27510 |
Unauthorized access to Gateway user capabilities |
CWE-288: Authentication Bypass Using an Alternate Path or Channel |
Citrix Gateway, Citrix ADC |
Appliance must be configured as a
|
CVE-2022-27513 |
Remote desktop takeover via phishing |
CWE-345: Insufficient Verification of Data Authenticity |
Citrix Gateway, Citrix ADC |
Appliance must be configured as a
and the RDP proxy functionality must be configured |
CVE-2022-27516 |
User login brute force protection functionality bypass |
CWE-693: Protection Mechanism Failure |
Citrix Gateway, Citrix ADC |
Appliance must be configured as a
OR
and the user lockout functionality “Max Login Attempts” must be configured for either Gateway or AAA virtual server |
The following supported versions of Citrix ADC and Citrix Gateway are affected by this vulnerability:
-
Citrix ADC and Citrix Gateway 13.1 before 13.1-33.47
-
Citrix ADC and Citrix Gateway 13.0 before 13.0-88.12
-
Citrix ADC and Citrix Gateway 12.1 before 12.1.65.21
-
Citrix ADC 12.1-FIPS before 12.1-55.289
-
Citrix ADC 12.1-NDcPP before 12.1-55.289
This bulletin only applies to customer-managed Citrix ADC and Citrix Gateway appliances. Customers using Citrix-managed cloud services do not need to take any action.
What Customers Should Do
Affected customers of Citrix ADC and Citrix Gateway are recommended to install the relevant updated versions of Citrix ADC or Citrix Gateway as soon as possible:
-
Citrix ADC and Citrix Gateway 13.1-33.47 and later releases
-
Citrix ADC and Citrix Gateway 13.0-88.12 and later releases of 13.0
-
Citrix ADC and Citrix Gateway 12.1-65.21 and later releases of 12.1
-
Citrix ADC 12.1-FIPS 12.1-55.289 and later releases of 12.1-FIPS
-
Citrix ADC 12.1-NDcPP 12.1-55.289 and later releases of 12.1-NDcPP
Please note that Citrix ADC and Citrix Gateway versions prior to 12.1 are EOL and customers on those versions are recommended to upgrade to one of the supported versions.
Additionally, and unrelated to the aforementioned CVEs, security enhancements to help protect customers against HTTP Request Smuggling attacks have been added in the above versions of Citrix ADC, and Citrix Gateway. Customers may enable these enhancements using the Citrix ADC management interface. Please see https://support.citrix.com/article/CTX472830 for more information.
Acknowledgements
What Citrix is Doing
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Disclaimer
Changelog
Date | Change |
2022-11-08 | Initial Publication |
2022-11-10 | Clarification regarding Gateway configuration |