Category Archives: Windows

Microsoft and the unfixed ReFS bug in Windows

Posted on 2022-02-08 by guenni

[German]Microsoft's patchday is on February 8, 2022 again. However, those who hope that certain things will be fixed with the security updates on February 8 after the disaster with the January 2022 patchday might be disappointed. At least that probably … Continue reading →

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Windows 11 may bricks MSSQL server instances; no longer executable

Posted on 2022-02-07 by guenni

[German]Windows 11 seems to be becoming a challenge for many people because of problems with drivers and software at all corners. A blog reader alerted me to a particular problem on a customer's machine. There, an MSSQL Server instance can … Continue reading →

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Microsoft disables MSIX ms-appinstaller protocol handler in Windows (Feb. 2022)

Posted on 2022-02-05 by guenni

[German]After ransomware like Emotet or BazarLoader abused the MSIX ms-appinstaller protocol handler, Microsoft has now reacted again. The entire MSIX ms-appinstaller protocol handler has been disabled in Windows for the time being – more or less as protection against Emotet, … Continue reading →

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Edge 98.0.1108.43

Posted on 2022-02-04 by guenni

[German]Microsoft has updated the Chromium Edge browser to version 98.0.1108.43 as of February 3, 2022 (thanks to the reader for pointing this out). It is a new development branch that keeps up with Google Chrome (see Chrome 98.0.4758.8x released, 27 … Continue reading →

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Windows Server 2019: Is Update KB5010791 causing a Boot Loop?

Posted on 2022-02-04 by guenni

[German]Question for the administrators of Windows Server 2019 systems: What are your experiences regarding the January 11, 2022 updates and boot loops. On Domain Controllers, the boot loops are well known, but Microsoft has released out-of-band updates with a fix. … 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: ESET virus scanners have a LPE vulnerability

Posted on 2022-02-04 by guenni

[German]Slovakian antivirus vendor ESET has issued a warning for users of its Windows products. Certain antivirus products have a Local Privilege Escalation (LPE) vulnerability CVE-2021-37852 in older versions. This allows a local attacker to gain SYSTEM privileges from a default … Continue reading →

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Malicious CSV files can install BazarBackdoor

Posted on 2022-02-02 by guenni

[German]Cyber criminals have found a way to abuse text-based CSV files in order to install BazarBackdoor malware on victims' systems. Security researchers probably came across this fact while monitoring a phishing campaign. The culprit is the ability to access the … Continue reading →

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Windows 10/11: Systems required 2-6 hours of update connectivity for successful updates

Posted on 2022-01-31 by guenni

[German]Microsoft has just released information that affects Windows 10 and Windows 11, as well as their server counterparts. In order to successfully install updates on these machines, they apparently have to be accessible online via the Internet for a longer … Continue reading →

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Windows 10: Proof of Concept for vulnerability CVE-2022-21882

Posted on 2022-01-31 by guenni

[German]In January 2022, Microsoft closed the CVE-2022-21882 (Win32k Privilege Escalation) vulnerability in Windows 10/11 and Windows Server 20H2 on Patchday. However, the patch was not installed everywhere because of the many collateral damages. Now a public proof of concept (PoC) … 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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