Citrix Hypervisor Security Bulletin for CVE-2022-3643, CVE-2022-42328 & CVE-2022-42329

Several security issues have been identified in Citrix Hypervisor 8.2 LTSR CU1, each of which may allow a privileged user in a guest VM to cause the host to become unresponsive or crash. These issues have the following CVE identifiers: CVE-2022-3643 CVE-2022-42328 CVE-2022-42329...

Citrix Gateway and Citrix ADC Security Bulletin for CVE-2022-27510 CVE-2022-27513 and CVE-2022-27516

Vulnerabilities have been discovered in Citrix Gateway and Citrix ADC, listed below. Note that only appliances that are operating as a Gateway SSL VPN, ICA Proxy, CVPN, RDP Proxy are affected by the first issue, which is rated as a Critical severity vulnerability. CVE-ID| Description| CWE| Affect...

Citrix Workspace app for Mac Security Bulletin for CVE-2024-5027

A vulnerability has been discovered in Citrix Workspace app for Mac, which, if exploited, may result in elevation of privilege from a local authenticated user to a root user. Affected Versions: The following supported versions of Citrix Workspace app for Mac are affected by the vulnerability:...

Citrix Secure Access client for Windows Security Bulletin for CVE-2023-24491

A vulnerability has been discovered in the Citrix Secure Access client for Windows. The following supported versions are affected by the vulnerability: Versions before 23.5.1.3 The issue has the following identifier:...

NetScaler ADC and NetScaler Gateway Security Bulletin for CVE-2023-6548 and CVE-2023-6549

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...

Windows Virtual Delivery Agent for CVAD and Citrix DaaS Security Bulletin CVE-2024-6151

Description of Problem A vulnerability has been identified that impacts Virtual Delivery Agent for Windows used by Citrix Virtual Apps and Desktops and Citrix DaaS. Refer to below for further details: Affected Versions The vulnerability affects the following supported versions of Windows Virtual...

Citrix ADC and Citrix Gateway Security Bulletin for CVE-2022-27518

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 ---|---|---|---|---...

How to Deploy Citrix Gateway Plug-in and Endpoint Analysis Installer Packages for Windows by Using Active Directory Group Policy

This article contains information about deploying the Citrix Gateway Plug-in and Endpoint Analysis EPA Microsoft Installer MSI packages for Windows by using an Active Directory Group Policy. If users do not have administrative privileges to install the Citrix Gateway Plug-in and EPA Plug-in on th...

Citrix ADC and Citrix Gateway Security Bulletin for CVE-2023-3519, CVE-2023-3466, CVE-2023-3467

Multiple vulnerabilities have been discovered in NetScaler ADC formerly Citrix ADC and NetScaler Gateway formerly Citrix Gateway. The following supported versions of NetScaler ADC and NetScaler Gateway are affected by the vulnerabilities: NetScaler ADC and NetScaler Gateway13.1before13.1-49.13...

Citrix Licensing: Studio unable to connect to Licensing server - Untrusted server

1. Unable to connect to Citrix Licensing server from Studio getting "Untrusted server". 2. Getting "An error occurred while retrieving the certificate for the license server at this address". 3. Error Id: XDDS:BD69C800 DesktopStudioErrorId : UnknownError ErrorCategory : ResourceUnavailable...

ShareFile StorageZones Controller Security Update for CVE-2023-24489

A vulnerability has been discovered in the customer-managed ShareFile storage zones controller which, if exploited, could allow an unauthenticated attacker to remotely compromise the customer-managed ShareFile storage zones controller. This vulnerability affects all currently supported versions o...

Citrix Virtual Apps and Desktops Security Bulletin for CVE-2023-24483

A vulnerability has been identified that, if exploited, could result in a local user elevating their privilege level to NT AUTHORITY\SYSTEM on a Citrix Virtual Apps and Desktops Windows VDA. The vulnerability has been given the following identifier: CVE ID| Description| Vulnerability Type|...

"The Delivery Controller failed to complete an audit of the sessions running on the VDA"

After installing of updating a Linux VDA to version 2402, the VDA registers against the DDC successfully. However, when the user tries to launch the VDA, the VDA immediately becomes unregistered and the troubleshooting tab on the DDC show the following error: The Delivery Controller failed to...

Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP Edition appliance Security Update

Multiple vulnerabilities have been discovered in Citrix ADCformerly known as NetScaler ADC, Citrix Gateway formerly known as NetScaler Gateway, and Citrix SD-WAN WANOP Edition appliance models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities, if exploited,could result in the followin...

Citrix Optimizer Tool

Citrix Optimizer Tool - v3.5.0.1 Created Date: Jun 21, 2017 Updated Date: Mar 12, 2025 SHA 256 Checksum: D8DCBF77BAE73E2EB4F8F6DCF408AFE90714230A15D3EB7390933D8DFB339044 To help us improve the Citrix Optimizer Tool, please send your feedback to https://forms.gle/TwWrKPT6J8u7GdKA6. Please note: Yo...

Citrix Gateway Plug-in for Windows Security Update

Description of Problem Vulnerabilities have been identified in Citrix Gateway Plug-in for Windows that, if exploited, could result in a local user escalating their privilege level to SYSTEM. The vulnerabilities have the following identifiers: CVE-2020-8257 CVE-2020-8258 These vulnerabilities affe...

Citrix ShareFile storage zones Controller multiple security updates

Description of Problem Security issues have been identified in customer-managed Citrix ShareFile storage zone controllers. These vulnerabilities, if exploited, would allow an unauthenticated attacker to compromise the storage zones controller potentially giving an attacker the ability to access...

Citrix XenServer 7.2 Multiple Security Updates

Description of Problem A number of security issues have been identified within Citrix XenServer 7.2 which could, if exploited, allow a malicious man-in-the-middle MiTM attacker on the management network to decrypt management traffic. Collectively, this has been rated as a medium severity...

Failed to launch session "session_name". Error code: 2519 on Citrix Workspace App During App/Desktop Launch

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. This article is intended for Citrix administrators and technical teams only. Non-admin users must...

Impact of Chromium vulnerabilities CVE-2023-4863 and CVE-2023-5217 on Cloud Software Group products

Cloud Software Group will continue to update this post as additional information becomes available. Summary Google Chromium Heap-Based Buffer Overflow Vulnerability Cloud Software Group is aware of the vulnerabilities CVE-2023-4863 and CVE-2023-5217 that impact Chromium. CVE-2023-4863 description...

CVE-2015-7547 - Citrix Security Advisory for glibc Vulnerability

Overview A vulnerability has been recently disclosed in the glibc getaddrinfo function. This issue could potentially allow an attacker to inject code into a process that calls the vulnerable function. The issue has been assigned the following CVE identifier: CVE-2015-7547: The vulnerable function...

Citrix SD-WAN Security Bulletin for CVE-2022-27505 and CVE-2022-27506

Vulnerabilities have been discovered in multiple Citrix SD-WAN products. These vulnerabilities, if exploited, could result in the following security issues: CVE-ID| Description| CWE| Affected Products| Pre-conditions ---|---|---|---|--- CVE-2022-27505| Reflected cross site scriptingXSS| CWE-79:...

Citrix Workspace app for Windows Security Bulletin for CVE-2023-24484 & CVE-2023-24485

Vulnerabilities have been identified that, collectively, allow a standard Windows user to perform operations as SYSTEM on the computer running Citrix Workspace app. These vulnerabilities have the following identifiers: CVE ID| Description| Vulnerability Type| Pre-conditions ---|---|---|---...

How to enable Teams Optimization with Microsoft's new VDI Optimization engine - SlimCore

Microsoft has released a new VDI solution for Teams. This is a how-to guide detailing the steps necessary to enable the SlimCore Optimization for Teams. We hope this guide will ease your effort to enable the new solution in your environment. If you have further feedback that you want to share wit...

Windows 11 VDA machines stuck at Initializing for Azure AD or Hybrid Azure AD

For Citrix MCS provisioned Azure AD or Hybrid Azure AD joined machine catalogs that use Windows 11 22H2 or 23H2 as master VMs’ OS, the VDA machines might be stuck at “Initializing” status after startup. And when you login to the VDA machines and execute the “dsregcmd /status” command, “Provider:...

Citrix Application Delivery Management Security Bulletin for CVE-2022-27511 and CVE-2022-27512

Vulnerabilities have been discovered in Citrix Application Delivery Management Citrix ADM that, if exploited, could result in the following security issues: Corruption of the system by a remote, unauthenticated user. The impact of this can include the reset of the administrator password at the ne...

Error: TDICA 1005/1007 and Sessions Disconnected/ Not Responding

Usersessions freezing / disconnecting. Network and performance has been checked and no issues found. However, TDICA 1005/1007 events are seen in the logs at the same time the error occurred. This might be a problem with flaky network connections between the ICA clients and the VDA servers Session...

Citrix Hypervisor Security Update

A security issue has been identified in Citrix Hypervisor 7.1 LTSR CU2 that may allow privileged code in a PV guest VM to compromise the host. Citrix believes that there would be significant complexity in performing this attack in Citrix Hypervisor. The issue has the following CVE identifier:...

Cloud Software Group Security Advisory for CVE-2024-6387

Advisory for 3rd party CVE-2024-6387 Cloud Software Group is aware of the vulnerability CVE-2024-6387 impacting OpenSSH. Qualys has discovered a remote unauthenticated code execution vulnerability in OpenSSH’s server sshd in glibc-based Linux systems. Because this vulnerability is a regression of...

Event: 1020 Connection Validation failed on Domain "for user" for reason 'Deny'

SSL Certificate handshake is not successful for ICA sessions since the VDA's are not enabled with SSL communication. Mismatch of License edition configured under Studio Licensing...

Windows and Linux Virtual Delivery Agent for CVAD and Citrix DaaS Security Bulletin CVE-2023-24490

A vulnerability has been identified that impacts Virtual Delivery Agents for Windows or Linux used by Citrix Virtual Apps and Desktops and Citrix DaaS. The vulnerability affects the following supported versions of Windows Virtual Delivery Agent: Current Release CR Citrix Virtual Apps and Desktops...

CVE-2015-4000 - Citrix Security Advisory for DHE_EXPORT TLS Vulnerability

Overview A TLS protocol vulnerability has been recently disclosed that could result in attackers being able to intercept and modify SSL/TLS encrypted traffic to servers that support Diffie-Hellman based export cipher suites. This vulnerability is known as 'LogJam' and has been assigned the...

Citrix Hypervisor Security Update

Description of Problem A security issue has been identified in certain CPU hardware that may allow unprivileged code running on a CPU core to infer the value of memory data belonging to other processes, virtual machines or the hypervisor that are, or have recently been, running on the same CPU...

How to Change Order of NICs in XenServer

Theinterface-rename is a utility included in Citrix Hypervisor 8.2 Cumulative Update 1 and XenServer 8. This utility allows for granular management of network interface cards to facilitate renaming and reordering of them from the default installed configuration. The interface-rename utility refer...

Citrix Workspace app for Linux Security Bulletin for CVE-2023-24486

A vulnerability has been identified in Citrix Workspace app for Linux that, if exploited, may result in a malicious local user being able to gain access to the Citrix Virtual Apps and Desktops session of another user who is using the same computer from which the ICA session is launched. CVE ID|...

Citrix Hypervisor Security Update

Description of Problem Several security issues have been identified that, collectively, may allow privileged code running in a guest VM to cause the host to crash or to become unresponsive. These issues have the following CVE identifiers: CVE ID| Description| Vulnerability Type| Pre-conditions...

Citrix Hypervisor Security Updates

Description of Problem Modern CPUs contain random number generators that provide entropy randomness to the software running on those processors to use for purposes such as generating cryptographic encryption keys. Software can obtain entropy by using the RDRAND and RDSEED instructions. A security...

Citrix License server unavailable on Studio with Error: XDDS:796F2703

The license server is marked as unavailable on Studio even though the license server is up and running The error received when trying to connect to the license server is as follows, An error occurred while retrieving the certificate for the license server at this address. Further error details ar...

FAQ: What are the Difference Between WANOP, Standard and Enterprise Edition Licenses of NetScaler SD-WAN ?

Q: What is the difference between WANOP, Standard and Enterprise Edition license of NetScaler SD-WAN? A : With WANOPEdition License you can only have WAN Optimization feature which is applicable on NetScaler SD-WAN Version 7.x and below, 9.0.1, 9.1.0 +. With Standard Edition License you can only...

Citrix Cloud Intermittent loss of connectivity to On-Prem AD

When attempting to run MCS Process - Ran into issues contacting the On-Prem Active Directory Citrix.CloudServices.ADAgent EventID 10102 Errors: Message=Unable to connect to the forest associated with domain "DOMAINNAME.local"...

XenCenter 2024.2.0 - For Citrix Hypervisor and XenServer

Who Should Install This Update? This XenCenter update is for customers who use XenCenter as the management console for Citrix Hypervisor 8.2 CU1 and XenServer 8. This version of XenCenter supersedes any previous version of XenCenter. It constitutes the following deliverable: File Name|...

Citrix Hypervisor Security Update

Description of Problem An issue has been discovered in Citrix Hypervisor that, if exploited, could potentially allow an attacker on the management network to enumerate valid administrative account usernames. Note that this attack does not disclose the corresponding passwords and does grant not...

Citrix Application Delivery Controller, Citrix Gateway, and Citrix SD-WAN WANOP appliance Security Update

Description of Problem Multiple vulnerabilities have been discovered in Citrix ADCformerly known as NetScaler ADC, Citrix Gatewayformerly known as NetScaler Gatewayand Citrix SD-WAN WANOP appliance models 4000-WO, 4100-WO, 5000-WO, and 5100-WO. These vulnerabilities,if exploited,could result ina...

Errors logging off the endpoints while having active published apps - “CGPPowerNotifWndCls: wfica23.exe – Application error”

Users are reporting an error when logging off from their workstations while havingactive published app sessions The users are not closing the published app before logging off the Worksstation. Users utilize Windows 10 machines with Imprivata to badge-in/badge-out Agent 6.3. When they badge in,...

Citrix Hypervisor Security Update

Description of Problem Several security issues have been identified in Citrix Hypervisor formerly Citrix XenServer that may allow: unprivileged code in a PV guest VM to compromise that PV guest VM privileged code in a guest VM to cause the host to crash or become unresponsive privileged code in a...

Licensing - We encounter the error "Citrix license server unavailable" in Citrix Studio.

After successfully upgrading the Citrix licensing server to version 11.17.2 build 51000, we encounter the error "Citrix license server unavailable" in Citrix Studio. The error in Licensing Manager "The License Activation Service entitlement could not be retrieved, Check your connection to License...

Citrix Hypervisor Security Bulletin for CVE-2023-46838

Description of Problem An issue has been discovered that affects Citrix Hypervisor 8.2 CU1 LTSR and may allow malicious privileged code in a guest VM to cause the host to crash or become unresponsive. This issue has the following identifier: CVE-2023-46838 What Customers Should Do We have release...

Citrix Hypervisor Security Update

Several security issues have been identified in Citrix Hypervisor, that may each allow privileged code in a guest VM to cause the host to crash or become unresponsive. These issues have the following identifiers: CVE-2021-28704 CVE-2021-28705 CVE-2021-28714 CVE-2021-28715 All of these issues affe...

Citrix SD-WAN Multiple Security Updates

Description of Problem Multiple vulnerabilities have been identified in the management interface of Citrix NetScaler SD-WAN physical appliances and virtual appliances. Collectively these vulnerabilities could allow an unauthenticated attacker with access to the management interface to compromise...

Citrix XenServer Multiple Security Updates

Description of Problem A number of security vulnerabilities have been identified in Citrix XenServer that may allow a malicious administrator of an HVM guest VM to compromise the host. These vulnerabilities affect all currently supported versions of Citrix XenServer up to and including Citrix...