DDoS Attacks Wane in Q4 Amid Cryptomining Resurgence

Distributed denial-of-service DDoS attacks dropped significantly at the end of 2020, down 31 percent in the fourth quarter, according to researchers. The reason? Cybercriminals have switched their efforts and their botnets to cryptomining. According to an analysis from Kaspersky published Tuesday...

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...

DDoS attacks in Q4 2020

News overview Cybercriminals are constantly on the lookout for means and methods to make attacks more destructive. In Q4 2020, Citrix ADC application delivery controller devices became one such tool, when perpetrators abused their DTLS interface. The DTLS Datagram Transport Layer Security protoco...

How to troubleshoot printing on Citrix Workspace app for Mac

How it all works Prerequisites and scope What is supported What is not supported External dependencies for printing Apple/HP...

An application that uses scrolling graphics may experience heavy lag / low frame rate

Neuro Works is an application used by neurologists to view and playback studies of patient EEGs. When they open Neuro Works through Citrix, users can define speed and time-based settings to view these EEGs. When viewing, these EEGs scroll across the screen from left to right, and this "playback"...

Experiencing performance and disconnects while using Optimized Microsoft Teams with Citrix Workspace App for Windows 2102

Performance and stability issues being experienced when joining Microsoft Teams meetings while using Citrix Optimized Microsoft Teams with Citrix Workspace App for Windows 2102. The shared display content may be slow and user could potentially disconnect from the meeting. And Citrix Workspace App...

Hotfix XS82E016 - For Citrix Hypervisor 8.2

Who Should Install This Hotfix? This is a hotfix for customers running Citrix Hypervisor 8.2. All customers who are affected by the issues described inCTX291439 - Citrix Hypervisor Multiple Security Updatesshould install this hotfix. Information About this Hotfix Component| Details ---|---...

Does CWAL support http store

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 toCTX297149for more information Does CWAL supports http store in Native receiver or Storebrowse?...

Diagnosing an unresponsive Citrix Hypervisor server

This article describes how to diagnose an unresponsive XenServer or Citrix Hypervisor server. If you cannot connect to your Citrix Hypervisor server from XenCenter or other orchestration tool, you can use the steps in this article to attempt to regain access to the unresponsive server and gather...

Citrix Hypervisor Security Update

Description of Problem A security issue has been identified that may allow privileged code running in a guest VM to which a PCI passthrough device has been allocated to cause other VMs with PCI passthrough devices to fail to boot, crash or become unresponsive. This only applies to guest VMs where...

Hotfix XS82E015 - For Citrix Hypervisor 8.2

Who Should Install This Hotfix? This is a hotfix for customers running Citrix Hypervisor 8.2. Information About this Hotfix Component| Details ---|--- Prerequisite| None Post-update tasks| None Content live patchable| No Baselines for Live Patch| N/A Revision History| Published on Feb02, 2021 To...

Setting automatic reboots when updating the Citrix VM Tools for Windows

When updating your Citrix VM Tools for Windows through Windows Update, multiple VM reboots can sometimes be required to complete the update. If all reboots are not completed, you might temporarily lose your static IP configuration. You can set a registry key that specifies the maximum number of...

Nefilim Ransomware Gang Hits Jackpot with Ghost Account

A Nefilim ransomware attack that locked up more than 100 systems stemmed from the compromise of an unmonitored account belonging to an employee who had died three months previously, researchers said. Nefilim a.k.a. Nemty is a ransomware strain that emerged in 2020, with its operators adopting the...

VulnCheck KEV: CVE-2019-13608

Citrix StoreFront Server contains an XML External Entity XXE processing vulnerability that may allow an unauthenticated attacker to retrieve potentially sensitive information...

Recommendations to Prevent PVS Write Cache from filling Up Too Fast

This article provides some recommendations to prevent the PVS Write Cache to fill up too fast. PVS Write Cache on RAM with OverFlow to HD improves the machines performance and it is the most recommended one. However, if the the HD dedicated to store Write Cache dumped from cache on RAM, this will...

VulnCheck KEV: CVE-2019-11634

Citrix Workspace Application and Receiver for Windows contains remote code execution vulnerability resulting from local drive access preferences not being enforced into the clients' local drives...

VulnCheck KEV: CVE-2020-8283

An authorised user on a Windows host running Citrix Universal Print Server 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...

Exploit for Path Traversal in Citrix Xenmobile_Server

使用方法&免责声明 该脚本为Citrix XenMobile 目录遍历漏洞（CVE-2020-8209）批量检测脚本。 使用方法：Python CVE-2020-8209-Multiple.py url.txt 存在漏洞的地址输出在vul.txt中 影响版本： - RP2之前的Citrix XenMobile Server 10.12 - RP4之前的Citrix XenMobile Server 10.11 - RP6之前的Citrix XenMobile Server 10.10 - RP5之前的Citrix XenMobile Server 10.9...

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...

Microsoft Security Update Validation Report January 2021

Microsoft’s January 2021 security updates have passed Citrix testing the updates are listed below. The testing is not all-inclusive; all tests are executed against English only environments and issues may still be found upon implementation. Follow best practices for testing and installing softwar...