CVE-2022-27518: Citrix ADC and Citrix Gateway Security Bulletin for CVE-2022-27518

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Security Bulletin | Critical | {{likeCount}} found this helpful | Created: {{articleFormattedCreatedDate}} | Modified: {{articleFormattedModifiedDate}}

Description of Problem

A vulnerability has been discovered in Citrix Gateway and Citrix ADC, listed below, that, if exploited, could allow an unauthenticated remote attacker to perform arbitrary code execution on the appliance.

CVE-ID

Description

CWE

Affected Products

Pre-conditions

CVE-2022-27518

Unauthenticated remote arbitrary code execution

CWE-664: Improper Control of a Resource Through its Lifetime

Citrix Gateway, Citrix ADC

Citrix ADC or Citrix Gateway must be configured as a SAML SP or a SAML IdP

The following supported versions of Citrix ADC and Citrix Gateway are affected by this vulnerability:

• Citrix ADC and Citrix Gateway 13.0 before 13.0-58.32

• Citrix ADC and Citrix Gateway 12.1 before 12.1-65.25

• Citrix ADC 12.1-FIPS before 12.1-55.291

• Citrix ADC 12.1-NDcPP before 12.1-55.291

Citrix ADC and Citrix Gateway version 13.1 is unaffected.

Customers can determine if their Citrix ADC or Citrix Gateway is configured as a SAML SP or a SAML IdP by inspecting the ns.conf file for the following commands:

• add authentication samlAction

  - Appliance is configured as a SAML SP

         OR 

• add authentication samlIdPProfile

  - Appliance is configured as a SAML IdP

If either of the commands are present in the ns.conf file and if the version is an affected version, then the appliance must be updated.

What Customers Should Do

Exploits of this issue on unmitigated appliances in the wild have been reported. Citrix strongly urges affected customers of Citrix ADC and Citrix Gateway to install the relevant updated versions of Citrix ADC or Citrix Gateway as soon as possible:

• Citrix ADC and Citrix Gateway 13.0-58.32 and later releases

• Citrix ADC and Citrix Gateway 12.1-65.25 and later releases of 12.1

• Citrix ADC 12.1-FIPS 12.1-55.291 and later releases of 12.1-FIPS

• Citrix ADC 12.1-NDcPP 12.1-55.291 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.

Citrix has also published a related blog at https://www.citrix.com/blogs/2022/12/13/critical-security-update-now-available-for-citrix-adc-citrix-gateway/ , which contains further context

What Citrix is Doing

Citrix is notifying customers and channel partners about this potential security issue through the publication of this security bulletin on the Citrix Knowledge Center at https://support.citrix.com/securitybulletins.

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.

Subscribe to Receive Alerts

Citrix strongly recommends that all customers subscribe to receive alerts when a Citrix security bulletin is created or modified at https://support.citrix.com/user/alerts.

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. Customers are therefore recommended to always view the latest version of this document directly from the Citrix Knowledge Center.

Changelog

Date

Change

2022-12-13

Initial Publication

2022-12-13

Minor font changes

2022-12-13

Enabling email notifications

2022-12-13

Added a link to the Citrix blog post which contains further context