Patch Tuesday January 2021 - 83 vulnerabilities (1 0day)

Microsoft has just started rolling out its monthly series of updates also known as Patch .

In this month's updates, the company from the patched a total of 83 vulnerabilities across a wide range of products, including the Windows operating system, cloud-based products, developer tools, and enterprise servers.

But of all patched today, the most significant being a zero-day vulnerability in Microsoft Defender antivirus, for which Microsoft said that released exploit before the release of today's updates.

The vulnerability is listed as CVE-2021-1647, and is characterized as a remote code execution (RCE) error. It allows attackers to run code on vulnerabilities , tricking a user into opening a malicious document on a system with Defender installed.

Microsoft said that despite the fact that exploit is already available, the attack does not work in all situations and is still considered to be at PoC level. However, the code could evolve for more reliable attacks.

So to deal with future attacks, Microsoft released updates for Microsoft Protection Engine, οι οποίες δεν απαιτούν κάποια αλληλεπίδραση από τους χρήστες και θα εγκατασταθούν αυτόματα – and if blocked by system administrators.

In addition to Defender zero-day, Microsoft also patched one in the splwow64 Windows service that could be exploited to elevate privileges in an attacker's code.

Read more: Security Update Guide portal

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Written by giorgos

George still wonders what he's doing here ...

6 Comments

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  1. I have not been able to solve the problem, To ask something and if you can fall, if the error is not solved, he will not be able to get the next updates? Or does it not matter? If the calculator will not be able to be updated from now on I will have to ask for help from a technician

    • Good morning. Try the following:
      A) Right click on the start.
      B) In the window that opens select the: windows power shell (administrator).

      Do not forget to choose what it says to run the power shell as an administrator!

      There in this window you will write "sfc / scannow" (without the quotes).

      When the scan done by windows is finished (it will take some time) then it will

      C) press and write in the power scan window the following: "dism / online / cleanup-image / restorehealth" (without quotes).

      When the windows job is done (clearing the registry of upgrades, restart the computer and then

      D) Update your computer again. It will probably not do all the upgrades without any problems.

      Note: this problem has been around since windows 7 and is due to some updates. Malfunctions that have become a chronic childhood disease of windows.

      Good Luck.

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