There is a Windows error that Microsoft can't fix forever, so a third party has to fix it

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CVE-2021-34484 is a Windows local privilege escalation zero-day vulnerability that allows users with administrative rights in Windows 10, Windows 11, and Windows Server.

This vulnerability scores 7.8 in the CVSS v3. So far, there is no sign of this vulnerability being exploited by attackers, but there are still many potential risks.

There is a Windows error that Microsoft can't fix forever, so a third party has to fix it Picture 1

In August 2021, Microsoft released an official patch for this vulnerability shortly after it was discovered. After that, this bug was marked as fixed, but in fact, Microsoft's patch only fixed part of the problem, the vulnerability still existed.

A few months ago, 0patch discovered this vulnerability in the Windows User Profile Service. So 0patch took action and self-released the patch profext.dll.

By January 2022, Microsoft fixed this bug and replaced the "profext.dll" file, which caused the unofficial fix to be removed from everyone who applied the January Windows updates. 2022. In fact, Microsoft's patches did not fix the error, even breaking the previous unofficial patch of 0patch.

0patch continues to have to update its patch to be compatible with the latest Microsoft Tuesday Update and provide it for free to all registered users.

Affected and updated versions of Windows include:

Windows 10 v21H1 (32 & 64 bit) updated with the March 2022 Update
Windows 10 v20H2 (32 & 64 bit) updated with March 2022 Update
Windows 10 v1909 (32 & 64 bit) updated with the March 2022 Update
Windows Server 2019 64 bit updated with March 2022 Update

Microsoft said that it is aware of this case and will take appropriate steps to protect the safety of users.

Samuel Daniel

Update 24 March 2022

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There is a Windows error that Microsoft can't fix forever, so a third party has to fix it

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