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AUSCERT External Security Bulletin Redistribution
ESB-2022.6474
Citrix ADC and Citrix Gateway Security Bulletin for CVE-2022-27518
14 December 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Citrix ADC
Citrix Gateway
Publisher: Citrix
Operating System: Windows
Resolution: Patch/Upgrade
CVE Names: CVE-2022-27518
Original Bulletin:
https://support.citrix.com/article/CTX474995/citrix-adc-and-citrix-gateway-security-bulletin-for-cve202227518
Comment: CVSS (Max): None available when published
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Citrix ADC and Citrix Gateway Security Bulletin for CVE-2022-27518
Reference: CTX474995
Category : Critical
Created : 13 December 2022
Modified : 13 December 2022
Applicable Products
o Citrix ADC
o Citrix Gateway
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|Pre-conditions |
| | | |Products| |
+--------------+---------------+----------------+--------+--------------------+
| |Unauthenticated|CWE-664: |Citrix |Citrix ADC or Citrix|
| |remote |Improper Control|Gateway,|Gateway must be |
|CVE-2022-27518|arbitrary code |of a Resource |Citrix |configured as a SAML|
| |execution |Through its |ADC |SP or a SAML IdP |
| | |Lifetime | | |
+--------------+---------------+----------------+--------+--------------------+
The following supported versions of Citrix ADC and Citrix Gateway are affected
by this vulnerability:
o Citrix ADC and Citrix Gateway 13.0 before 13.0-58.32
o Citrix ADC and Citrix Gateway 12.1 before 12.1-65.25
o Citrix ADC 12.1-FIPS before 12.1-55.291
o 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:
o add authentication samlAction
- Appliance is configured as a SAML SP
OR
o 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.
This bulletin only applies to customer-managed Citrix ADC and Citrix Gateway
appliances. Customers using Citrix-managed cloud services or Citrix-managed
Adaptive Authentication do not need to take any action.
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 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:
o Citrix ADC and Citrix Gateway 13.0-58.32 and later releases
o Citrix ADC and Citrix Gateway 12.1-65.25 and later releases of 12.1
o Citrix ADC 12.1-FIPS 12.1-55.291 and later releases of 12.1-FIPS
o 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 .
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
- --------------------------END INCLUDED TEXT--------------------
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