CVE-2018-8414 Microsoft Windows Shell Remote Code Execution

Exploited in the wild High 8.8 Published Updated

Attackers can execute arbitrary code by exploiting improper file path validation in the Windows Shell.

Exploited in the wild
Since 25 Mar 2022
Login needed
Not needed
Attackable
Over the internet
Victim action needed
A user has to click or open something
Fix
None listed

What is CVE-2018-8414?

CVE-2018-8414 is a high-severity path traversal vulnerability in Microsoft Windows 10, published on 15 Aug 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

A remote code execution vulnerability exists when the Windows Shell does not properly validate file paths, aka "Windows Shell Remote Code Execution Vulnerability." This affects Windows 10 Servers, Windows 10.

Weakness: CWE-20

Which versions are affected by CVE-2018-8414?

It affects 5 products.

Products include Microsoft Windows 10 1703, Microsoft Windows 10 1709, Microsoft Windows 10 1803, Microsoft Windows Server 1709, Microsoft Windows Server 1803.

How do I fix CVE-2018-8414?

No fix has been published for CVE-2018-8414 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 15 Apr 2022.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2018-8414 being exploited?

Yes. Attackers have exploited CVE-2018-8414 in the wild since at least 25 Mar 2022.

Public exploit code: 1 proofs of concept on GitHub.

Sources

Also known as GHSA-xg99-mpwj-gf2c.

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