Helient® Blog

ESXi Upgrades Can Break Your Citrix ADC (NetScaler) Virtual Appliances

by Daniel Ruiz Senior Solutions Architect With the latest VMware vCenter Server & Cloud Foundation Vulnerabilities many organizations are rushing to upgrade the VMware infrastructure, and as a result breaking the Citrix ADC (NetScaler) Virtual Appliances. Before preforming an upgrade on your vSphere ESXi infrastructure, it is very important to check the latest Support matrix […]

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Critical Microsoft Print Spooler Vulnerability

by Christian Vindel Desktop & Applications Architect Microsoft has confirmed a remote code execution vulnerability regarding the Windows Print Spooler and has assigned CVE-2021-34527 for tracking purposes. The recently identified vulnerability is being publicly referred to as “PrintNightmare”. This vulnerability has a severity rating of 8 out of 10 and is marked as high. Please […]

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Multiple Vulnerabilities Discovered in Citrix ADC, Gateway & SD-WAN WANOP Appliances

by Daniel Ruiz Senior Solutions Architect Multiple vulnerabilities have been discovered in Citrix ADC (NetScaler), Citrix Gateway (NetScaler Gateway) and Citrix SD-WAN WANOP appliances. Citrix strongly recommends that affected customers install relevant updates as soon as possible.  If exploited could result in the following security issues. Vulnerabilities: CVE-2020-8299 – Network-based denial-of-service from within the same Layer 2 network segment […]

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VMware Announces vCenter Server & Cloud Foundation Vulnerabilities With 9.8 Serverity Rating

by Jared Hamilton Manager of Technical Operations VMware announced on May 25th, 2021 (Advisory ID: VMSA-2021-0010) two new vulnerabilities that target vCenter Server versions 6.5, 6.7 and 7.0 as well as Cloud Foundation (vCenter Server) versions 3.x and 4.x. Both vulnerabilities have a severity rating of 9.8 out of 10 and are marked as critical. […]

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Citrix Announces a New Citrix Workspace App Vulnerability

by Daniel Ruiz Senior Solutions Architect Citrix announces a new Citrix Workspace App vulnerability.  Customers should upgrade to a fixed version as soon as possible or check if the version they are running has been automatically updated. Vulnerabilities: The vulnerability could result in a local user escalating their privilege level to SYSTEM on the computer […]

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Multiple Security Flaws Discovered in Dell BIOS Drivers

by Timothy Higbie Desktop & Applications Architect Security researcher SentinelLabs recently discovered multiple security vulnerabilities in Dell’s BIOS firmware update driver.   These vulnerabilities have been in place since 2009 and affect 100s of millions of Dell PCs.  An attacker could use these BIOS vulnerabilities to elevate local kernel-mode privileges.  Such a privilege elevation could be […]

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Daylight Saving Time Alert – Important Reminder About Upcoming Clock Change

by Armen Gharibian Managing Director This is a reminder that Daylight Saving Time will begin at 2:00 AM (EST) on Sunday, March 14th. This semiannual time change can cause major problems with VDI environments such as machine registration issues, session disconnects, and group policy failures. Whether using Citrix Provisioning Services, Citrix Machine Creation Services, or […]

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Critical ESXi Vulnerabilities Announced by VMware (CVE-2020-4004, CVE-2020-4005)

by Richard Charlton Senior Systems Engineer VMware announced yesterday (November 19, 2020), two new vulnerabilities effecting ESXi 6.5, 6.7 and 7.0. CVE-2020-4004 has been named ‘Use-after-free vulnerability in XHCI USB controller’ and allows a bad actor with local administrative privileges on a VM to execute code on the host. As such, this vulnerability has been […]

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Certificates Missing After Upgrading from Windows 10 Version 1809 to Newer Feature Update

by Timothy Higbie Desktop & Applications Architect Microsoft has acknowledged that Windows 10 Cumulative Updates from September 2020 and later contain a bug that can cause all certificates to be deleted from a PC during the upgrade from version 1809 to a newer Feature Update. This can lead not only to a failed upgrade but […]

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Citrix Announces New CVAD Security Vulnerability

by Daniel Ruiz Senior Solutions Architect On November 10th 2020, Citrix announced new Citrix Virtual Apps and Desktop (CVAD) Security Vulnerabilities. Customers should ensure they have installed the latest cumulative update and then apply all hotfixes for that version. Vulnerabilities: A user who has access to a Windows Virtual Desktop being able to escalate their privilege level on that Windows Virtual Desktop to SYSTEM. Remote compromise of a Windows Virtual Desktop which has Windows […]

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