Tag Archives: Linux

VMware ESXi: Retbleed fixes cause 70% performance loss in Linux VMs running kernel 5.19

Posted on 2022-09-14 by guenni

In performance regression testing, VMware testers found a severe performance drop for Linux guests when running kernel 5.19 in a VMware ESXi virtual machine with the Retbleed fixes installed. The degradation was up to 70% for computing, up to 30% … Continue reading →

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Rumor: Microsoft supports "Windows Mode" in Linux

Posted on 2022-04-01 by guenni

[German]This is a cool thing that Microsoft and the Linux developer community around Linus Torvalds are planning for the future. Up to now, Microsoft's developers have been tinkering with a Windows Subsystem for Linux (WSL) in Windows, so that the … Continue reading →

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How to find weak passwords in Active Directory and eliminate them with PowerShell

[Sponsored Post]Weak or compromised passwords are a known gateway for attackers. If you are able to identify which users in Active Directory (AD) are threatened by this, then PowerShell can help to remedy it. However, PowerShell scripts cannot eliminate basic AD deficits, other tools are needed for this. More ...

motionEyeOS: People who want to continue the project wanted

Posted on 2022-03-31 by guenni

[German]motionEyeOS is a Linux distribution that turns your single-board computer into a video surveillance system. However, the developer of motionEyeOS can no longer actively work on this project for personal reasons, as he writes. If anyone is interested in taking … Continue reading →

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Dirty Pipe Linux vulnerability allows root access

Posted on 2022-03-08 by guenni

[German]A vulnerability CVE-2022-0847, known as Dirty Pipe, exists in almost all Linux distributions and allows unprivileged users to gain root privileges in Linux kernel 5.8 and above. Linux distributions, IoT devices (and possibly Android systems, if they already use kernel … Continue reading →

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Linux: Microsoft recommendation on enforcement mode against Active Directory takeover may cause issues

Posted on 2022-01-29 by guenni

[German]Microsoft recommends installing the November 2021 security updates on Windows servers that operate as DCs as protection against a domain takeover caused by the vulnerabilities CVE-2021-42287 and CVE-2021-42278. And Micrsooft also recommends enabling so-called enforcement mode to protect against the … Continue reading →

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Ubuntu 21.04: Support ends January 20, 2022

Posted on 2022-01-14 by guenni

Small hint for people who are still using Ubuntu 21.04. This was released on April 22, 2021, as you can read here. According to this page, support expires in January 2022 – 9too4linux.com has it a bit more precise in … Continue reading →

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Astra Group has developed a software stack with an Exchange Server replacement for Russia

Posted on 2021-11-28 by guenni

[German]The russian Astra Group has developed a replacement for Microsoft's Exchange Server that fully implements its functionality. The product is scheduled to hit the Russian market at the end of the first quarter of 2022. The company intends to fully … Continue reading →

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14 Vulnerabilities in BusyBox

Posted on 2021-11-12 by guenni

[German]Security researchers from JFrog and Claroty Team82 have found 14 vulnerabilities in the popular BusyBox tool. All vulnerabilities were confidentially reported to the developer of BusyBox and fixed in version 1.34.0, which was released on August 19. The vulnerabilities could … Continue reading →

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Vulnerability in Linux Kernel

Posted on 2021-11-12 by guenni

[German]There is a vulnerability in the kernel of all popular Linux distributions that researchers from SentinelLabs made public a few days ago. A TIPC module in all common Linux distributions can be exploited by heap overflow attacks that can lead … Continue reading →

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Malware targets the Windows Subsystem for Linux (WSL)

Posted on 2021-09-18 by guenni

[German]Security researchers from Lumen's Black Lotus Labs have come across several malware samples that can infect the Windows subsystem for Linux and then switch to the native Windows environment. Experts had outlined this scenario back in 2017. Thus, the Microsoft … Continue reading →

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