===================================================================== CERT-Renater Note d'Information No. 2024/VULN035 _____________________________________________________________________ DATE : 17/01/2024 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running Citrix NetScaler ADC and NetScaler Gateway versions prior to 14.1-12.35, 13.1-51.15, 13.0-92.21, NetScaler ADC versions prior to 13.1-FIPS 13.1-37.176, 12.1-FIPS 12.1-55.302, 12.1-NDcPP 12.1-55.302. ===================================================================== https://support.citrix.com/article/CTX584986/netscaler-adc-and-netscaler-gateway-security-bulletin-for-cve20236548-and-cve20236549 _____________________________________________________________________ CTX584986 NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2023-6548 and CVE-2023-6549 Security Bulletin | Severity: High Applicable Products NetScaler Gateway NetScaler Description of Problem Two vulnerabilities have been discovered in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). Affected Versions: The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities: NetScaler ADC and NetScaler Gateway 14.1 before 14.1-12.35 NetScaler ADC and NetScaler Gateway 13.1 before 13.1-51.15 NetScaler ADC and NetScaler Gateway 13.0 before 13.0-92.21 NetScaler ADC 13.1-FIPS before 13.1-37.176 NetScaler ADC 12.1-FIPS before 12.1-55.302 NetScaler ADC 12.1-NDcPP before 12.1-55.302 Note: NetScaler ADC and NetScaler Gateway version 12.1 is now End Of Life (EOL) and is vulnerable. This bulletin only applies to customer-managed NetScaler ADC and NetScaler Gateway products. Customers using Citrix-managed cloud services or Citrix-managed Adaptive Authentication do not need to take any action. Summary: NetScaler ADC and NetScaler Gateway contain the vulnerabilities described below. CVE ID Description Pre-requisites CWE CVSS CVE-2023-6548 Authenticated (low privileged) remote code execution on Management Interface Access to NSIP, CLIP or SNIP with management interface access CWE-94 5,5 CVE-2023-6549 Denial of Service Appliance must be configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server CWE-119 8,2 Mitigating Factors CVE- 2023- 6548 only impacts the management interface. Cloud Software Group strongly recommends that network traffic to the appliance’s management interface is separated, either physically or logically, from normal network traffic. In addition, we recommend that you do not expose the management interface to the internet, as explained in the secure deployment guide. Removing such exposure to the internet greatly reduces the risk of exploitation of this issue. See NetScaler secure deployment guide ( https://docs.citrix.com/en-us/citrix-adc/citrix-adc-secure-deployment/secure-deployment-guide.html) for more information. What Customers Should Do Exploits of these CVEs on unmitigated appliances have been observed. *Cloud Software Group strongly urges affected customers of NetScaler ADC and NetScaler Gateway to install the relevant updated versions as soon as possible. NetScaler ADC and NetScaler Gateway 14.1-12.35 and later releases NetScaler ADC and NetScaler Gateway  13.1-51.15 and later releases of 13.1 NetScaler ADC and NetScaler Gateway 13.0-92.21 and later releases of 13.0  NetScaler ADC 13.1-FIPS 13.1-37.176 and later releases of 13.1-FIPS  NetScaler ADC 12.1-FIPS 12.1-55.302 and later releases of 12.1-FIPS  NetScaler ADC 12.1-NDcPP 12.1-55.302 and later releases of 12.1-NDcPP Note: NetScaler ADC and NetScaler Gateway version 12.1 is now End Of Life (EOL). Customers are recommended to upgrade their appliances to one supported version that addresses the vulnerabilities. Please use the following link for downloading the builds: https://www.citrix.com/downloads/ 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 2024-01-16 T 17:00:00Z Initial Publication 2024-01-16 T 17:00:00Z Added direct link to download the builds ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================