After upgrading NetScaler to build 14.1 47.46 or 13.1 59.19 customers might experience issues with Authentication.This can manifest as a «broken» login page, especially when using authentication methods like DUO configurations based on Radius authentication, SAML, or any Identity Provider (IDP) that relies on custom scripts.
Note : This behavior can possibly be due to the Content Security Policy (CSP) header being enabled by default in this NetScaler build, especially when CSP was not enabled prior to the upgrade.
Lösung
To resolve this issue temporarily, you need to disable the default CSP header on your NetScaler appliance. After disabling, it’s recommended to flush the cache to ensure the changes take effect immediately.
To ensure that your configurations work with CSP , please reach out to the support team so that we can identify the issue and fix it for your configuration.
Steps to Disable CSP Header:
Using Command Line Interface (CLI): Execute the following commands from Netscaler CLI:
set aaa parameter -defaultCSPHeader DISABLED
save ns config
Using Graphical User Interface (GUI):
Step 1: Log in to the NetScaler GUI.
Step 2: Navigate to NetScaler Gateway > Global Settings.
Step 3: Under the «Authentication Settings» section, click on Change authentication AAA settings.
Step 4: On the «Configure AAA Parameters» page, locate the Default CSP Header field. From the dropdown menu, select DISABLED.
Click OK to save the changes.
Post-Configuration Recommendation:
While enabling or disabling the default CSP policy, you are recommended to run the following command in the CLI
flush cache contentgroup loginstaticobjects
After performing the steps above, attempt to access your NetScaler Gateway authentication portal to validate if the issue is resolved.
Zusatz
Bei Fragen und Problemen können Sie sich gerne an Ihren AXACOM Verantwortlichen wenden.
A vulnerability has been discovered in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). Refer below for further details.
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 14.1-47.46
NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-59.19
NetScaler ADC 13.1-FIPS and NDcPP BEFORE 13.1-37.236-FIPS and NDcPP
NetScaler ADC 12.1-FIPS is not affected by this vulnerability.
Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are now End Of Life (EOL) and are vulnerable. Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.
Additional Note: Secure Private Access on-prem or Secure Private Access Hybrid deployments using NetScaler instances are also affected by the vulnerabilities. Customers need to upgrade these NetScaler instances to the recommended NetScaler builds to address the vulnerabilities.
This bulletin only applies to customer-managed NetScaler ADC and NetScaler Gateway. Cloud Software Group upgrades the Citrix-managed cloud services and Citrix-managed Adaptive Authentication with the necessary software updates.
Details
NetScaler ADC and NetScaler Gateway contain the vulnerability mentioned below:
CVE-ID
Description
Pre-conditions
CWE
CVSSv4
CVE-2025-6543
Memory overflow vulnerability leading to unintended control flow and Denial of Service
NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
CWE-119 – Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS v4.0 Base Score: 9.2(CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L)
What Customers Should Do
Exploits of CVE-2025-6543 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 14.1-47.46 and later releases
NetScaler ADC and NetScaler Gateway 13.1-59.19 and later releases of 13.1
NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1-37.236 and later releases of 13.1-FIPS and 13.1-NDcPP. Customers should contact support – https://support.citrix.com/support-home/home to obtain the 13.1-FIPS and 13.1-NDcPP builds that address this issue.
Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are now End Of Life (EOL) and no longer supported. Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.
A vulnerability has been discovered in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). Refer below for further details.
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 14.1-43.56
NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-58.32
NetScaler ADC 13.1-FIPS and NDcPP BEFORE 13.1-37.235-FIPS and NDcPP
NetScaler ADC 12.1-FIPS BEFORE 12.1-55.328-FIPS
Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are now End Of Life (EOL) and are vulnerable. Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.
Additional Note: Secure Private Access on-prem or Secure Private Access Hybrid deployments using NetScaler instances are also affected by the vulnerabilities. Customers need to upgrade these NetScaler instances to the recommended NetScaler builds to address the vulnerabilities.
This bulletin only applies to customer-managed NetScaler ADC and NetScaler Gateway. Cloud Software Group upgrades the Citrix-managed cloud services and Citrix-managed Adaptive Authentication with the necessary software updates.
Disclaimer
The information on this page is being provided to you on an «AS IS» and «AS-AVAILABLE» basis. The issues described on this page may or may not impact your system(s). Cloud Software Group, Inc. and its subsidiaries (collectively, «Cloud SG») make no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. BY ACCESSING THIS PAGE, YOU ACKNOWLEDGE THAT CLOUD SG SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. Cloud SG reserves the right to change or update the information on this page at any time. We accordingly recommend that you always view the latest version of this page. The information contained herein is being provided to you under the terms of your applicable customer agreement with Cloud SG, and may be used only for the purposes contemplated by such agreement. If you do not have such an agreement with Cloud SG, this information is provided under the cloud.com Terms of Use, and may be used only for the purposes contemplated by such Terms of Use.
Details
NetScaler ADC and NetScaler Gateway contain the vulnerabilities mentioned below:
CVE ID
Description
Pre-conditions
CWE
CVSSv4
CVE-2025-5349
Improper access control on the NetScaler Management Interface
Access to NSIP, Cluster Management IP or local GSLB Site IP
CWE-284: Improper Access Control
CVSS v4.0 Base Score: 8.7(CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L)
CVE-2025-5777
Insufficient input validation leading to memory overread
NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
CWE-125: Out-of-bounds Read
CVSS v4.0 Base Score: 9.3(CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L)
What Customers Should Do
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 14.1-43.56 and later releases
NetScaler ADC and NetScaler Gateway 13.1-58.32 and later releases of 13.1
NetScaler ADC 13.1-FIPS and 13.1-NDcPP 13.1-37.235 and later releases of 13.1-FIPS and 13.1-NDcPP
NetScaler ADC 12.1-FIPS 12.1-55.328 and later releases of 12.1-FIPS
Additionally, we recommend running the following commands to terminate all active ICA and PCoIP sessions after all NetScaler appliances in the HA pair or cluster have been upgraded to the fixed builds.:
kill icaconnection -all
kill pcoipConnection -all
Please ensure that the formatting remains intact as you copy and paste these commands.
Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are now End Of Life (EOL) and no longer supported. Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.
Two vulnerabilities have been discovered in NetScaler ADC (formerly Citrix ADC) and NetScaler Gateway (formerly Citrix Gateway). Refer below for further details.
NetScaler are affected is RDP-Proxy Feature is enabled and/or Kerberos Constrained Delegation is configured!
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 14.1-29.72
NetScaler ADC and NetScaler Gateway 13.1 BEFORE 13.1-55.34
NetScaler ADC 13.1-FIPS BEFORE 13.1-37.207
NetScaler ADC 12.1-FIPS BEFORE 12.1-55.321
NetScaler ADC 12.1-NDcPP BEFORE 12.1-55.321
Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are now End Of Life (EOL) and are vulnerable. Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.
This bulletin only applies to customer-managed NetScaler ADC and NetScaler Gateway. 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 mentioned below
CVE ID
Description
Pre-requisites
CWE
CVSS
CVE-2024-8534
Memory safety vulnerability leading to memory corruption and Denial of Service
The appliance must be configured as a Gateway (VPN Vserver) with RDP Feature enabled ORThe appliance must be configured as a Gateway (VPN Vserver) and RDP Proxy Server Profile is created and set to Gateway (VPN Vserver) ORThe appliance must be configured as a Auth Server (AAA Vserver) with RDP Feature enabled
CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CVSS v4.0 Base Score: 8.4(CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:L)
CVE-2024-8535
Authenticated user can access unintended user capabilities
The appliance must be configured as a Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) with KCDAccount configuration for Kerberos SSO to access backend resourcesOR The appliance must be configured as aAuth Server (AAA Vserver) with KCDAccount configuration for Kerberos SSO to access backend resources
CWE-440: Expected Behavior Violation
CVSS v4.0 Base Score: 5.8(CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:L/VA:L/SC:H/SI:H/SA:H)
What Customers Should Do
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 14.1-29.72 and later releases
NetScaler ADC and NetScaler Gateway 13.1-55.34 and later releases of 13.1
NetScaler ADC 13.1-FIPS 13.1-37.207 and later releases of 13.1-FIPS
NetScaler ADC 12.1-FIPS 12.1-55.321 and later releases of 12.1-FIPS
NetScaler ADC 12.1-NDcPP 12.1-55.321 and later releases of 12.1-NDcPP
Note: NetScaler ADC and NetScaler Gateway versions 12.1 and 13.0 are now End Of Life (EOL) and no longer supported. Customers are recommended to upgrade their appliances to one of the supported versions that address the vulnerabilities.
CVE-2024-8534:
Customers can determine if they have an appliance configured as one of the following by inspecting their ns.conf file for the specified strings
A Gateway (VPN Vserver) with the RDP Feature enabled, enable ns feature.*rdpproxy add vpn vserver
A Gateway (VPN Vserver) with an RDP Proxy Server Profile created and set to the Gateway (VPN Vserver) add rdp serverprofile <RDP_server_name> add vpn vserver <vserver_name> -rdpServerProfileName <RDP_server_name>
An Auth Server (AAA Vserver) with the RDP Feature enabled. enable ns feature.*rdpproxy add authentication vserver
CVE-2024-8535: Customers can determine if they have an appliance configured as one of the following by inspecting their ns.conf file for the specified strings
A Gateway (SSL VPN, ICA Proxy, CVPN, RDP Proxy) with KCDAccount configuration for Kerberos SSO to access backend resources add aaa kcdaccount
An Auth Server (AAA Vserver) with KCDAccount configuration for Kerberos SSO to access backend resources add aaa kcdaccount
In addition, upon upgrading to the fixed version, customers must perform the shell commands mentioned below: nsapimgr_wr.sh -ys call=ns_aaa_flush_kerberos_tickets
Note: In case of High Availability (HA) or Cluster setup of the NetScaler appliances, the above operation should be performed after upgrading all the appliances.
Aufgrund einer Umstellung vom GCM auf das FCM Protokoll (Firebase Cloud Messaging HTTP Protocol) ist ein Push für Android-Geräte welche vor dem 20. Juli 2024 registriert wurden nicht mehr möglich.
Betroffene Benutzer müssen sich neu ausrollen um wieder Push-Notifications zu erhalten. Es gibt auch keinen automatischen Migrationsweg.
Migration of Android Devices registered via GCM to FCM
Title
Migration of Android Devices registered via GCM to FCM
CTX Number
CTX691804
Article Type
Problem Solution
Created Date
4/Oct/2024
Last Modified Date
4/Oct/2024
Symptoms or Error
There is no automatic update from Azure Notification Hub or Google Push Notification Service to migrate Android clients from the FCM legacy protocol to the latest FCMv1 protocol. As a result, affected users will need to manually re-register their devices with NetScaler Gateway. Please refer to the “Re-register your Android device” Section for detailed instructions on how to complete the re-registration.
Workaround: Users can fallback to the TOTP authentication method until their devices are re-registered.
Solution
In this article we are going to share how to Migrate Android Devices registered via GCM registration template to FCM registration template
Android devices registered for the Push Notification Service before July 20, 2024, will no longer receive push notifications from September 20 2024.
This change only affects Android devices registered with the NetScaler Push Solution and does not impact iPhone devices.
Android devices registered with the NetScaler solution on or after July 20, 2024, will not be affected by this change.
Re-register your Android device
Users are required to re-register their devices with NetScaler Gateway to enable push notification functionality. Please note that different organizations may have varying methods for accessing the registration FQDN. Therefore, affected users are advised to contact their respective administrators for assistance in reaching the correct registration FQDN. Below is a sample process for re-registration.
