Category Archives: Virtualization

Cyberattack debacle on VMware ESXi Server; "Recovery Script" for ESXiArgs Ransomware Victims

Posted on 2023-02-08 by guenni

[German]Since last weekend, cyberattacks on vulnerable ESXi servers have been ongoing worldwide and there are probably a number of people affected (in Germany, a three-digit number is said to be affected). The attackers are exploiting a vulnerability that was already … Continue reading →

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Do we need RDS licenses for Citrix Virtual App/Desktop environments?

Posted on 2023-01-29 by guenni

Do we actually need Microsoft RDS licenses if we run an environment with Citrix Virtual App/Desktop? Citrix has discussed this in the article Do We Need RDS Licenses For Citrix Virtual App/Desktop Environment. Short answer: yes, you need both Citrix … Continue reading →

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How to log off disconnected Citrix sessions after 1 hour via power shell

Posted on 2022-12-26 by guenni

[German]A short tip for administrators of Citrix solutions (Citrix Virtual Apps and Desktops Service). Sometimes administrators are need to log off users whose sessions have been in disconnected state for a long time. There is a PowerShell solution from Citrix … Continue reading →

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Windows Server 2019: Container feature cannot be installed (0x800F0831, 0x80073701)

Posted on 2022-12-23 by guenni

[German]Around the out-of-band update for the Hyper-V issue with Windows Server 2019/2022, a blog reader contacted me. He is experiencing an issue where the Container feature cannot be installed as a role on Windows Server 2019. The installation attempt aborts … Continue reading →

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Windows Server 2019/2022: Out-of-Band Updates fixes Hyper-V Issue (Dec. 20, 2022)

Posted on 2022-12-21 by guenni

[German]The security updates rolled out by Microsoft on the December 2022 patchday lead to problems with Hyper-V in certain constellations. New VMs can no longer be created, existing VMs have problems with Ethernet connections, etc. Microsoft has now released a … Continue reading →

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Why ISL Online: Critical factors when choosing a remote desktop solution

[Sponsored Post]In the rapidly evolving IT world, choosing the right remote desktop software is critical for organizations that value security, ease of use and reliability. One provider of secure remote access that has been on the market since 2001 is ISL Online, which presents some considerations for choosing such software below. More ...

Windows Server 2019/2022: December 2022 security updates cause Hyper-V issues

Posted on 2022-12-15 by guenni

[German]The security updates rolled out by Microsoft on the December 2022 patchday lead to problems with Hyper-V in certain constellations. New VMs can no longer be created, existing VM have problems with Ethernet connections, etc. Microsoft has admitted to these … Continue reading →

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VMware vulnerability CVE-2022-22954 threatened by ransomware, end of support for ESXi 6.5 & 6.7

Posted on 2022-10-23 by guenni

[German]Various VMware products contain the critical vulnerability CVE-2022-22954 , for which a security update was provided back in April 2022. I had addressed the vulnerability in the blog post Warning: critical vulnerabilities in VMware products (April 6, 2022). Advertising

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VirtualBox 7.0.2 released

Posted on 2022-10-22 by guenni

[German]Oracle's developers had just released VirtualBox version 7.0.0 (VirtualBox 7.0.0 with Secure Boot and virtual TPM support), and now they have already pushed an update to version 7.0.2. This version is a maintenance update for bug fixes. Advertising

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VirtualBox 7.0.0 with Secure Boot and virtual TPM support

Posted on 2022-10-11 by guenni

[German]Oracle's developers have released the new Virtualbox version 7.0.0 on October 10, 2022. Secure Boot has been implemented in the EFI in this version. In addition, this version can emulate virtual TPM 1.2 and 2.0, which comes into play for … Continue reading →

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Mandiant, VMware and US-CERT warn of malware targeting VMware ESXi servers

Posted on 2022-09-30 by guenni

[German]Google-acquired security vendor Mandiant has encountered a new malware family (VirtualPITA, VirtualPIE, and VirtualGATE) that targets virtualization solutions like VMware ESXi Server and uses specialized techniques to infiltrate. VMware has issued a security advisory to that effect, and US-CERT is … Continue reading →

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