Gateway: Cannot connect to the Citrix XenApp Server. Protocol Driver Error.

Launch Fails with Error: "Cannot connect to the Citrix XenApp Server. Protocol Driver Error."...

Gateway: "Cannot connect to the Citrix XenApp Server. The Network is down."

Launch Fails with Error: "Cannot connect to the Citrix XenApp Server. The Network is down."...

FAQ: Citrix Secure Hub for Mobile Devices and MicroVPN Technology

Citrix Endpoint Management, using technology formerly called XenMobile This article contains frequently asked questions about MicroVPN with XenMobile App or Enterprise editions and NetScaler Gateway deployments. Q: What are the recommended versions of components for MicroVPN? Q: What is MicroVPN?...

StoreFront Logon Error: "Incorrect user name or password"

Domain users are unable to logon to StoreFront and receive an error message: “Incorrect user name or password” with Event ID: 4625 and Failure Reason: “The user has not been granted the requested logon type at this machine”. The error can be seen on Citrix Receiver and on the StoreFront StoreWeb...

How to create message action to log to syslog in Citrix NetScaler

This article describes how to create a message action that can be bound to a responder or rewrite policy that logs to syslog in NetScaler...

Vulnerabilities fixed in Citrix Gateway Plug-in for Windows

Citrix has fixed two vulnerabilities in the Citrix Gateway Plug-in for Windows. By exploiting these vulnerabilities could potentially gain elevated privileges acquire elevated privileges on the vulnerable system. Citrix has released updates to fix the vulnerabilities. For more information, see:...

Election Systems Under Attack via Microsoft Zerologon Exploits

U.S. government officials have warned that advanced persistent threat actors APTs are now leveraging Microsoft’s severe privilege-escalation flaw, dubbed “Zerologon,” to target elections support systems. Days after Microsoft sounded the alarm that an Iranian nation-state actor was actively...

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...

Error: "Socket Operation on Non-Socket" and "Error 1030" When Launching Apps and Desktop Through NetScaler Gateway

1030 error when launching apps and desktop through NetScaler Gateway. Error "Unable to launch your application. Contact your help desk with the following information: Cannot connect to the Citrix XenApp server. Socket operation on non-socket" when launching apps through NetScaler Gateway...

Exploit for Path Traversal in Citrix Application_Delivery_Controller_Firmware

This is a Python script that exploits the CVE-2019-19781 vulnerability in Citrix Application Delivery Controller and Citrix Gateway. The script is designed to upload a malicious XML file to the vulnerable device, which will execute the code contained within, resulting in remote code execution. Th...

Error: "Failed with status 1110" When Launching Desktops or Apps Through NetScaler Gateway

Citrix Gateway, formerly Citrix NetScaler Unified Gateway The following errors are displayed when launching desktops or apps through NetScaler Gateway: Failed with status 1110 "The connection to Desktopfailed with status Unknown client error 1110"...

Citrix ADC and Citrix NetScaler Gateway Multiple Vulnerabilities (CTX281474)

The remote Citrix ADC or Citrix NetScaler Gateway device is version 11.1.x prior to 11.1-65.12, 12.1.x prior to 12.1-58.15 or 12.1-FIPS prior to 12.1-55.187 13.0.x prior to 13.0-64.35. It is, therefore, affected by multiple vulnerabilities: - A HTML injection vulnerability exists in Citrix ADC du...

Citrix SD-WAN WANOP Multiple Vulnerabilities (CTX281474)

The remote Citrix SD-WAN WANOP device is version 10.2.x prior to 10.2.7b, 11.0.x prior to 11.0.3f, 11.1.x prior to 11.1.2a, 11.2.x prior to 11.2.1a. It is, therefore, affected by multiple vulnerabilities: - A denial of service DoS vulnerability originating from the management network. CVE-2020-82...

Joining Storefront to Server Group Error "Cannot Join Server Group"

Error when trying to add second SF server to existing group: "Cannot join server group There was a problem connecting to the authorizing server. Verify the server name and try again." Joining Storefront Server will show the following Event under "Citrix Delivery Services Logs " Log Name: Citrix...

Configure "-denySSLReneg" Parameter to Disable Client Side and Server Side SSL Renegotiation on ADC

This article describes the configuration and use of -denySSLReneg parameter that is recently added to Citrix ADC appliance firmware and Citrix Gateway application software...

Citrix Workspace App for Windows Security Update Privilege Escalation Vulnerability (CTX277662)

The version of Citrix Workspace installed on the remote host is affected by a privilege escalation vulnerability in the the automatic update service due to improper access control. An authenticated, remote attacker can exploit this issue, to gain administrator access to the system. Note that Ness...

Citrix Hypervisor Security Update

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

Selection of Accounts with more than one Store in Workspace App is not getting retained

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. If you select All accounts from the UI of the CWA for Windows for version 1909 or higher, the...

Known Citrix Workspace Bug Open to New Attack Vector

A Citrix Workspace vulnerability that was fixed in July has been found to have a secondary attack vector, which would allow cybercriminals to elevate privileges and remotely execute arbitrary commands under the SYSTEM account. The bug CVE-2020-8207, exists in the automatic update service of the...

A Patient Dies After Ransomware Attack Paralyzes German Hospital Systems

German authorities last week disclosed that a ransomware attack on the University Hospital of Düsseldorf UKD caused a failure of IT systems, resulting in the death of a woman who had to be sent to another hospital that was 20 miles away. The incident marks the first recorded casualty as a...