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.
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:
-
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
Obtaining Support on This Issue
Subscribe to Receive Alerts
Reporting Security Vulnerabilities to Citrix
Disclaimer
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 |