NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2024-5491 and CVE-2024-5492

Description of Problem Two vulnerabilities have been discovered in NetScaler ADC formerly Citrix ADC and NetScaler Gateway formerly Citrix Gateway. Refer to below for further details: Affected Versions The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the...

Citrix Workspace app for HTML5 Security Bulletin CVE-2024-6148 and CVE-2024-6149

Description of Problem Two vulnerabilities have been discovered that impact the Citrix Workspace app for HTML5. Refer to below for further details: Affected Versions The vulnerabilities affect the following supported versions of the Citrix Workspace app for HTML5. Citrix Workspace app for HTML5...

Citrix Workspace app for Windows Security Bulletin CVE-2026-78546 and CVE-2026-78547

Severity - Medium Description of Problem Two vulnerabilities have been discovered that impact the Citrix Workspace app for Windows. Affected Versions The vulnerabilities affect the following supported versions of the Citrix Workspace app for Windows. Current Release CR Citrix Workspace app for...

XenServer - VMs on a Cisco USC host do not receive the DHCP settings

When running VMs on a XenServer 8.4 host running on Cisco UCS hardware, the VMs do not receive the DHCP settings...

Citrix Workspace App for Windows restarts after .NET upgrade

Citrix Workspace App Restart Issue: Mitigating .NET Runtime Upgrade Impact If the user endpoint updates the .NET Desktop Runtime, any .NET Core-based app running at the time of the update might exhibit inconsistent behavior. To mitigate this issue, Citrix Workspace App restarts itself. Behavior o...

Provisioning 2203 : Citrix PVS breaks with Microsoft OLEDB driver v19

When upgrading PVS 2203 servers to mitigate a Microsoft OLEDB driver vulnerability CVE-2023-36728, a customer incorrectly removed Microsoft OLE DB Driver 18 and installed Microsoft OLE DB Driver 19. PVS Server 2203 cannot use Microsoft OLE DB Driver 19 to communicate with the SQL server...

WEM - Exception: Failed to determine site for agent machine

WEM Agent does not get registered. Agent log 4:41:56 PM Exception - VuemAgentServiceConfigurationHelper.UpdateConfigurationSet : Failed to determine site for agent machine. 4:41:56 PM Exception - VuemAgentServiceConfigurationHelper.ReadRepositorySettings : Error happened while getting global...

SSON not working with Microsoft Edge, Google Chrome and Firefox . Message "No logon methods are available on this platform" is seen.

After logging on to Chrome,Edge or Firefox this message is seen. No logon methods are available on this platform" After browsing to the Storefront URL a screen appears asking to detect if Citrix Workspace App ininstalled . Then this screen is seen...

Disable Restart Button While Desktops are Restarting

This article describes how to configure the StoreFront to ignore clicks on “Restart” while desktop is powering off and while it is powering on again. Background When the user’s desktop is restarting, there might be issues if they repeatedly click on the desktop...

DDC 2203 - How to manually remove the stale DDC from Database

Old removed DDC is listed under Zones alongside the two current DDCs. "Get-BrokerController" and database table 'chbConfig.Controllers' shows working DDCs...

[Citrix Gateway] Can't Launch ICA Desktop/App with Error: 2517

You may observe ICA launch failures with error: 2517 through NetScaler gateway ICA proxy vServer. The issue happens when EDTAdaptive transport is enabled randomly...

Citrix XenServer Multiple Security Updates

Description of Problem A number of vulnerabilities have been identified within Citrix XenServer that could, if exploited, allow a malicious administrator of a guest VM to crash the host and, for some XenServer versions, allow a remote attacker to compromise the host. The following vulnerabilities...

NetScaler-13.1-Warning "is_whitelisted_request - Dropping invalid http request" in ns.log

You may see warning message like below in ns.log and would like to know why this log exists. Aug 12 16:50:25 X.X.X.X 08/12/2024:07:50:25 GMT XXX 0-PPE-2 : default SSLVPN Message 918225 0 :"iswhitelistedrequest - Dropping invalid http request:|/v1|"...

CWA Mac 2503: Launch Failure “no Citrix SSL server configured on the specified address”

Users who are on Citrix Workspace app for Mac 2503, attempting to launch Citrix sessions, may encounter a failure. The following error message is displayed to the end user: “No Citrix SSL Server configured on the specified address." as below...

WEM Agents are not listed in Console and failed to register

WEM Agents are not listed in Console and failed to register, Citrix WEM Agent Host Service Debug.log and Event Logs shows the below exception. ConfigurationDataSourcesHelper.CheckAgentBrokerServiceClient : System.ServiceModel.Security.SecurityNegotiationException : The caller was not authenticate...

Cloud connector disconnected - event id 514

In a resource location with multiple cloud connectors, some of them show as "disconnected" in Citrix Cloud or the Cloud Dashboard page. Other Connectors do not display the problem. All Cloud Connectors in the same VLAN. Cloud Connector Connectivity Check Utility does not detect any problems with...

How to configure bookmarks on NetScaler Gateway

This is a step-by-step on how to create bookmarks on the NetScaler and attach those to specific AD groups...

Automating Citrix Probe Agent Installation and Configuration

Purpose This article contains instructions on using PowerShell to automate the installation and configuration of Citrix Probe Agent. The PowerShell script can be downloaded from this page. The same script can also be used to update the configured values for an existing installation of Probe Agent...

Citrix ShareFile StorageZones Controller Multiple Security Updates

Description of Problem Two security issues have been identified within Citrix ShareFile StorageZones Controller that, if exploited, could allow a compromised or malicious ShareFile user to write arbitrary files as that Active Directory user to the local file system, and also to discover the full...

Citrix Hypervisor Security Update

Description of Problem Two issues have been identified in Citrix Hypervisor that may, if exploited, allow privileged code in an HVM guest VM to compromise or crash the host. These issues only apply in specific configurations; furthermore, Citrix believes that there would be significant difficulty...

Authentication Bypass Vulnerability in the Management Interface of Citrix Application Delivery Controller and Citrix Gateway

Description of Problem A vulnerability has been identified in the management interface of Citrix Application Delivery Controller ADC formerly known as NetScaler ADC, and Citrix Gateway, formerly known as NetScaler Gateway, that, if exploited, could allow an attacker with access to the management...

Citrix NetScaler Application Delivery Controller and NetScaler Gateway Multiple Security Updates

Description of Problem A number of vulnerabilities have been identified in supported versions of Citrix NetScaler Application Delivery Controller ADC and NetScaler Gateway. The following vulnerabilities have been addressed: CVE-2018-6810: Citrix NetScaler Application Delivery Controller ADC and...

CVE-2018-5314 - Authentication Bypass Vulnerability in Citrix NetScaler Application Delivery Controller (ADC) and NetScaler Gateway

Description of Problem A vulnerability has been identified in the management interface of Citrix NetScaler Application Delivery Controller ADC and NetScaler Gateway that, if exploited, could allow an unauthenticated attacker with access to the NetScaler management interface to bypass authenticati...

CVE-2016-6493 - Memory Permission Weakness in Citrix XenApp and XenDesktop

Description of Problem A weakness has been identified in Citrix XenApp and XenDesktop. While this issue is not directly exploitable, it could potentially weaken an existing security mitigation, resulting in a loss of defence in depth. This weakness affects the following Citrix products: Citrix...

CVE-2016-4810 - Vulnerability in Citrix Studio Could Result in Insecure Access Policy Configuration

Description of Problem A vulnerability has been identified in Citrix Studio that could allow Access Policy rules to be set insecurely on the Citrix XenDesktop Delivery Controller. This vulnerability affects the following product versions: Citrix XenDesktop 7.x between versions 7.0 and 7.6...

[NetScaler-AAA] MAC address EPA scan on macOS 15 may fail

If you have EPA policies to scan Gateway clients MAC address, it may fail after end users upgrading macOS to version 15. Log says, the MAC address predefined in EPA policy cannot be found. Log sample: 2024-09-26 15:54:30 Epa Failed2024-09-26 15:54:30 Case ID : 9fc302024-09-26 15:54:30 Epa log msg...

| Citrix Workspace App 24.x SSON fails and ssonsvr.exe not running on client

SSON fails with CWA 2402 and 2405.10 The logon to a session stops at the "other user" screen . It is also noticed that the ssonsvr.exe process is not running on the client...

How to Remove a Server from a XenServer Pool that Contains Only One Host

This article describes how to remove a server from a XenServer pool that contains only one server. The procedure to remove servers is also described in the XenCenter help. When you remove a server from a pool that contains only one server Pool Master, the pool will be deleted and the Pool Master...

Cannot input Simplified/Traditional Chinese or Japanese in Windows server 2019/2022 or Windows 10/11

For Windows Server 2019/2022 English OS or Windows 10/11 as VDA, CWA Windows Client uses Microsoft Pinyin IME to input simplified Chinese, Microsoft Bopomofo IME to input traditional Chinese, or Microsoft Japanese IME to input Japanese, keyboard sync mode is configured as "Sync only once" in...

PVS Login error: Error "the domain\user does not have access to the farm" or "The specified AuthGroup does not exist" when Trying to Connect to PVS Farm

When trying to connect to a PVS Farm through the PVS Console, the following error is displayed and you cannot connect to the Farm. Error : "the domain\user does not have access to the farm" Error : "The specified AuthGroup does not exist"...

How to Remove a DVD Drive from a XenServer Virtual Machine

This article describes how to remove a DVD drive from a XenServer virtual machine...

CVE-2018-18883 - Citrix XenServer Security Update

Description of Problem A security issue has been identified in Citrix XenServer that may allow a malicious administrator of an HVM guest VM to crash the host. This issue affects the following versions of Citrix XenServer: Citrix XenServer 7.6 Citrix XenServer 7.5 Citrix XenServer 7.1 LTSR CU1 The...

How to Remove XenTools for Clean Install

To remove XenTools from VMs if standard uninstall does not work...

CVE-2016-9637 - Citrix XenServer Security Update

Description of Problem A security vulnerability has been identified in Citrix XenServer that may allow malicious privileged-mode code running within an HVM guest VM to compromise the host. This vulnerability affects all currently supported versions of Citrix XenServer up to and including Citrix...

How to Enable StoreFront Verbose Logging

This article explainshow to use PowerShell to enable the native verbose logging and how to use Microsoft’s DebugView tool to collect traces. Requirements Basic knowledge of PowerShell...

Security Advisory for Citrix Hypervisor

Several security issues have been identified that affect Citrix Hypervisor: An issue has been identified that may allow privileged code in a PV guest VM to cause the host to crash. This issue has the following identifier: CVE-2022-23034 Note that PV guests are supported in Citrix XenServer 7.1 LT...

Citrix Workspace app showing white screen, screen does not refresh, app resize issues on client machines running Intel Iris Xe-Treiber video driver

-Citrix Workspace App won’t load/refresh, it stays just white screen -It is possible to refresh the apps by resizing the workspace app, but that is not a viable solution. -All version of Citrix workspace app is affected 20, 21.3, 21.4 TP...

CVE-2016-6273 - Denial of Service Vulnerability in Citrix License Server

Description of Problem A vulnerability has been identified in the Citrix License Server for Windows and Citrix License Server VPX that could allow a remote, unauthenticated attacker to crash the License Server. This vulnerability affects all versions of Citrix License Server for Windows and Citri...

App Layering/Unidesk: Boot failure after windows updates cmimcext.sys

Windows updates causes server to fail boot with error message file missing cmimcext.sys. BSOD with0xc000000f stop code. This can apply to a newly imported OS layer or to a new version of an existing OS layer...

XenServer and Citrix Hypervisor Security Update for CVE-2024-28956

Description of Problem Intel has disclosed a security issue affecting Intel CPUs. This CPU hardware issue may allow privileged code in a guest VM to infer some memory content of another VM that is running on the same CPU core. Although this is not a vulnerability in the XenServer or Citrix...

How to Create an ICA File with Minimal Parameters

To create an ICA file with minimal parameters set, complete the following procedure: 1. Download theICA file from this article. 2. Copy the content from this file into anICA file. 3. Update theusername orpassword parameter with the relevant username and password that you use in your environment...

wfshell.exe consumes high CPU

While the ICA session is closed, Citrix WinFrame Shell wfshell.exe process doesn't exit. This process consumes high CPU in Task Manager...

CVE-2017-5571 - Open Redirect Vulnerability in Citrix License Server for Windows and Citrix License Server VPX

Description of Problem An open redirect vulnerability has been identified in the Citrix License Server for Windows and the Citrix License Server VPX. This vulnerability could potentially be used to facilitate a phishing or social engineering attack. This vulnerability has been assigned the...

CVE-2016-6276 - Vulnerability in Citrix Linux VDA (formerly known as Linux Virtual Desktop) Could Result in Privilege Escalation

Description of Problem A vulnerability has been identified in the Linux Virtual Delivery Agent VDA component of Citrix XenDesktop that could allow a local user to execute commands as root on the Linux VDA. The vulnerability affects all versions of the Citrix Linux VDA earlier than version 1.4.0...

Citrix Hypervisor Security Update

Description of Problem A number of vulnerabilities have been found in Citrix Hypervisor formerly Citrix XenServer that may: i. Allow the host to be compromised by privileged code in a PV guest VM, ii. allow unprivileged code in a HVM guest VM to cause that guest to crash and iii. under certain...

How to troubleshoot “Cannot Start App” or “Cannot start Desktop” when launching an App or Desktop

Note: This is a master overview article. The solutions for each of the root causes is present in child articles shown in the following tables. The following error is displayed when launching an app “Cannot start App” or desktop: “Cannot start Desktop” Where to Start Troubleshooting Do you get the...

Citrix XenServer Multiple Security Updates

Description of Problem Two issues have been identified within Citrix XenServer, which could, if exploited, allow unprivileged code in a PV guest VM to cause the host to crash or become unresponsive. These vulnerabilities affect all currently supported versions of Citrix XenServer up to and...

How to Sysprep PVS images before they are streamed to Target Devices.

Question: Is needed to run Sysprep on PVS images? Answer: It is not needed to run Sysprep on PVS/MCS images since they both have their own version/method built-in to Sysprep the images. Also, it is not recommended to run Sysprep on PVS or MCS machines since it is not needed...

How Do I Load Balance FTPS Servers on a NetScaler ADC

This article describes how to load balance FTPS servers on a NetScaler ADC...

Citrix XenServer Multiple Security Updates

Description of Problem A number of security issues have been identified within Citrix XenServer. These issues could, if exploited, allow a malicious administrator of a PV guest VM to compromise the host. The issues have the identifiers: CVE-2017-8903 High: x86: 64bit PV guest breakout via pagetab...