HiveNightmare: New details about Windows vulnerability CVE-2021-36934

Posted on 2021-07-21 by guenni

Windows[German]Windows 10 has a serious vulnerability CVE-2021-36934 as of version 1809, which allows the Security Accounts Manager (SAM) database to be read via VSS shadow copies. This opens the door for local attackers to gain privileges from administrators and potentially move around networks. Meanwhile, the potential and scope of affected machines is becoming clearer, which is why I am publishing this follow-up article.

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WordPress 5.8

Posted on 2021-07-21 by guenni

As of 7/20/2021, WordPress 5.8 has been released by the developers. This is a new major version, which comes with some new features. An overview of these new features can be found in this WordPress article. I’ve updated my WordPress installation without issues so far.

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Serious vulnerability in printer drivers from HP, Xerox and Samsung

Posted on 2021-07-20 by guenni

Sicherheit (Pexels, allgemeine Nutzung)[German]There has been a severe vulnerability CVE-2021-3438 in the printer drivers of the manufacturers HP, Xerox and Samsung (presumably only laser printers) for 16 years, which affects millions of devices. The vulnerability was reported to HP on February 18, 2021, and an updated printer driver has been available since May 19, 2021. Here is some information on the issue provided to me by the security researchers.

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Windows 10 upgrade breaks SAM access rights from 1809 upward, user access possible

Posted on 2021-07-20 by guenni

Windows[German]It seems that Windows 10 feature updates from version 1809 up to the current version 21H1 change the access rights to the SAM database so that non-administrative users can access it. The cause could be the volume shadow copies (Shadow Copy), which are enabled by default. Here’s some initial information – I’m still sorting through it a bit at the moment.

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USA, EU, NATO, Microsoft & Co. Blame China for Hafnium Exchange Hack

Posted on 2021-07-20 by guenni

Sicherheit (Pexels, allgemeine Nutzung)[German]At the end of February, beginning of March 2021, there was a massive attack on Microsoft Exchange Server (see Exchange server 0-day exploits are actively exploited), in which many thousands of instances were hacked worldwide. Even then, the attacks were attributed to the Chinese hacker group Hafnium. Now the US along with its allies (UK, NATA) as well as the EU are accusing China of being responsible for this attack. The U.S. has also identified four Chinese nationals as responsible. 

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Microsoft explains the Windows 11 context menu and the Share dialog

Posted on 2021-07-20 by guenni

Windows[German]In fall of 2021, Microsoft will most likely release Windows 11 and then roll it out more broadly in 2022 (see Has Intel revealed the October 2021 release date and name for Windows 11?). This will include a user interface overhaul with a new Start menu and rounded windows (Sun Valley). In anticipation of the release of Windows 11, Microsoft has now explained the new context menus and the Parts dialog in more detail.

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Has Intel revealed the October 2021 release date and name for Windows 11?

Posted on 2021-07-20 by guenni

Windows[German]Let me put it this way: For me, it has been clear since the presentation that Microsoft will release its Windows 11 so sometime in October 2021 – even though the broad rollout with a free Windows 10 upgrade is not supposed to happen until 2022. Now, Intel may have unintentionally revealed the release date for Windows 11 as October 2021.

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Windows Hello login bypassed via infrared photo

Posted on 2021-07-20 by guenni

Sicherheit (Pexels, allgemeine Nutzung)[German]Security researchers from CyberArk have managed to trick Windows 10’s Hello login (also included in Windows 11) in terms of logging in via facial recognition. All they needed was an infrared photo of the face in question, used on a fake usb device acting as an IR camera. Here’s some information on the facts of the matter.

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Firefox 90.0.1 released

Posted on 2021-07-19 by guenni

Mozilla[German]The release of Firefox version 90.0.0 lasted just a week. Now the Mozilla developers have released July 19, 2021 version 90.0.1 as a maintenance update of the Firefox browser. Here is some information about what has been fixed.

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PrintNightmare: Point-and-Print allows installation of arbitrary files

Posted on 2021-07-19 by guenni

Sicherheit (Pexels, allgemeine Nutzung)[German]Regarding the problem, originally called PrintNightmare, that Windows systems are vulnerable via the print spooler service, there is a new warning. A remote print server that can be accessed by unauthorized parties allows arbitrary malicious files to be installed on clients via point-and-print. The US-CERT has issued a new warning about this. However, there is a possibility to mitigate this vulnerability via group policies.

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