CVE-2018-8343 Memory corruption in Windows 10

High 7.8 Published 15 Aug 2018 Updated 5 Aug 2024

An attacker can exploit a buffer overflow in the Windows NDIS driver to gain elevated privileges on affected systems.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2018-8343?

CVE-2018-8343 is a high-severity memory corruption vulnerability in Microsoft Windows 10, published on 15 Aug 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An elevation of privilege vulnerability exists in the Network Driver Interface Specification (NDIS) when ndis.sys fails to check the length of a buffer prior to copying memory to it, aka "Windows NDIS Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8342.

Weakness: CWE-120

Which versions are affected by CVE-2018-8343?

It affects 7 products.

Products include Microsoft Windows 10, Microsoft Windows 7, Microsoft Windows 8.1, Microsoft Windows Rt 8.1, Microsoft Windows Server 2008, Microsoft Windows Server 2012 and 1 more.

How do I fix CVE-2018-8343?

No fix has been published for CVE-2018-8343 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-8343 being exploited?

There is no known exploitation of CVE-2018-8343 in the wild and no public exploit code.

All Microsoft Windows 10 vulnerabilities

Sources

Also known as GHSA-w45p-vm8r-643w.