There is an unofficial patch from 0patch for a Zero-Day flaw in Microsoft Windows that allows bypassing the MotW (Mark-of-the-Web) protections that are built into the operating system and at moment it’s actively exploited.
By utilizing files signed with malformed signatures, this zero-day flaw is able to bypass MotW protections. Various legacy Windows versions as well as all versions that are supported by Microsoft are affected by the issue.
It has been determined by cybersecurity analysts that the Magniber ransomware was being installed on victims’ devices with the help of stand-alone JavaScript files by threat actors.
Unofficial Patch
0patch released this unofficial security patch to fix this flaw since it’s a critical zero-day vulnerability and is exploited by threat actors vigorously in the wild.
Why this patch has been tagged as “Unofficial”?
This patch is tagged as unofficial due to its release source, in short, this patch has not been released by Microsoft itself.
But, until the release of any official patch from Microsoft, users can use this security patch to keep their systems protected against threat actors exploiting this zero-day flaw.
Free Micropatch Availability
Due to this zero-day vulnerability, multiple Windows versions are affected and here below we have mentioned all the affected versions of Windows that are eligible for the free micropatches:-
- Windows 11 v21H2
- Windows 10 v21H2
- Windows 10 v21H1
- Windows 10 v20H2
- Windows 10 v2004
- Windows 10 v1909
- Windows 10 v1903
- Windows 10 v1809
- Windows 10 v1803
- Windows Server 2022
- Windows Server 2019
The installation process for this micropatch will require an account on the 0patch website, and it can be created for free. Once done, you’ll need to download its agent for your Windows device which will automatically install this patch.
