Citrix Receiver HDX Engine has stoped working after upgrading from Citrix Receiver 4.3.100 to 4.9 only for Linux VDA

This article is intended for Citrix administrators and technical teams only. Non-admin users must contact their company’s Help Desk/IT support team and can refer to CTX297149 for more information. On a Ubuntu 16.0.4 Linux VDA 7.15, when open opening a Desktop, we receive the error message "Citrix...

Unable to unistall VDA software, error - ‘Supportability tools fail with internal error code 1719, failing action was “WixQueryOSInfo”

-When the customer tries toremove the VDA from Programs and Features and get error ‘Supportability tools fail with internal error code 1719, failing action was “WixQueryOSInfo”’ and referred to the CTX about troubleshooting MSI installation issues,https://support.citrix.com/article/CTX226932 -If...

Receiver upgrade on VDA to Citrix Workspace App will cause Grey Output from Webcam

In this scenario, the VDA 7.15 CU3 comes with Receiver 4.12 in the original installation. However, due to a security concern, the Receiver needed to be updated to Citrix Workspace 1912. After the update, when using the webcam, the camera is detected, but instead of the image, only a grey field is...

Receiver didn't send out ICA connection request to the VDA after getting Launch.ica file. Got error "Unknow client error 1110" after 3 or more minutes.

When try to launch desktop, we find ICA file can be downloaded successfully, but CD Viewer doesn't pop up or sometimes CD Viewer can pop up 3 minutes later but show unknown client error 1110 immediately. The only solution is to reset the user profile in the client. The issue is related to specifi...

Citrix Virtual Apps and Desktops Security Update

Description of Problem Vulnerabilities havebeen identified in CitrixVirtual Apps and Desktopsthat could, if exploited,result in: An authenticateduserof amulti-sessionWindowsVDA, who has been granted permission to write to c:\ root directory, being able toescalatetheir privilege levelon that...

Command injection

An unprivileged Windows user on the VDA can perform arbitrary command execution as SYSTEM in CVAD versions before 2009, 1912 LTSR CU1 hotfixes CTX285870 and CTX286120, 7.15 LTSR CU6 hotfix CTX285344 and 7.6 LTSR CU9...

CVE-2020-8270

CVE-2020-8270 affects Citrix Virtual Apps and Desktops (CVAD) on Windows VDA: unprivileged users or SMB clients can escalate to SYSTEM via Citrix App-V Service when installed. The issue is listed with CVE-2020-8270 and related CTX hotfixes; affected product lines include CVAD 2009 or earlier, 191...

CVE-2020-8269

Citrix CVE-2020-8269 affects Citrix Virtual Apps and Desktops (VDA, App-V Service, UPS) with privilege escalation to SYSTEM. The root cause is unauthenticated/low-privilege user could execute arbitrary commands on the VDA or related components due to write access to C:\ or OS command handling vul...

Citrix Health Assistant - Troubleshoot VDA Registration and Session Launch

Citrix Virtual Apps and Desktops, formerly XenDesktop, fits the enterprise need to bring both VDI and apps into a user-centric experience. Citrix Virtual Apps, formerly XenApp, fits the enterprise need to bring legacy apps into a cloud management environment. Citrix Health Assistantv1.8.3.71...

Citrix Quick Launch Tool - Testing Application and Desktop Launch

Please note: You can download the required file from the Citrix downloads website by visiting the following link: https://www.citrix.com/downloads/citrix-tools Citrix QuickLaunch Tool v4.2 Created Date: 12/20/2016 Modified Date: 12/30/2020 Description Citrix QuickLaunch has been written to offer...

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 VDA Cleanup Utility Tool

Note: Please note: You can download the required file from the Citrix downloads website by visiting the following link:https://www.citrix.com/downloads/citrix-tools All references to VDA in this article are to the Windows version of VDA. Citrix recommends that you use the built-in uninstaller to...

How to collect data for ADC Gateway, Storefront, and VDA issues

To provide a comprehensive guide on how to properly collect data for issues with ADC when these issues are related to Gateway, Storefront, or VDA connectivity issues...

Citrix workspace app | Uninstallation of CWA breaks ICA session

If we have VDAs with this order of installation CWA installed first and then the VDA. Now when wetryto uninstall or upgrade the CWA, some display drivers from thevda get removed, as a result the ICA session breaks and the only way to get it working again is to - reinstall the VDA reboot,...

Cannot renew Remote Desktop Cal on MacBook

In VDA server, if MacBook Device name longer than 15 characters, there is an issue on renew RDS cals License. The eventlog has a 1028 warning with TerminalService-RemoteConnectionManger. Hence the user cannot use the XenApp normally...

Server VDA suddenly goes to unregistered state with error: The Security Support Provider Interface (SSPI) negotiation failed.

Studio shows as unregistered. Ping works fine. VDA registration health check tool passes all the tests. Error: Exception System.ComponentModel.Win32Exception 0x80004005: The Security Support Provider Interface SSPI negotiation failed...

PVS Provisioned VDA Experiences Poor Performance and Freezing

A PVS provisioned VDA can experience poor performance and freezing when the Machine Creation Services Write Back Cache drivers MCSIO are present in the vDisk image. It is typical to have first identified a machine in this state by its unregistered VDA status. While trying to access the VM, it may...

Logon process to VDAs is extremely slow when Citrix UPM is enabled

Logon to VDAs is extremely slow when Citrix UPM is enabled. When disabling the Citrix UPM service the logon process is normal. Sophos AV 10.x is installed on the VDAs...

Outlook Search Indexing Fails on Windows Server 2019 VDA

When setting up a Windows Server 2019 virtual machine with Multi session VDA 1912, Outlook Search Indexing is not function properly. In this scenario, User Profile Management functions as expected, and the OutlookOST and OutlookSearchIndex VHDX disks are properly mounted when user signed in...

UPM doesn't work randomly after VDA is rebooted

Intermittently UPM profile does not load, if user login immediately after the reboot...