CVE-2020-3951 Memory corruption in VMware Workstation and Horizon Client for Windows

Low 3.8 Published 17 Mar 2020 Updated 4 Aug 2024

A heap overflow in Cortado Thinprint allows guest users to cause a denial of service on the host system when virtual printing is enabled.

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-2020-3951?

CVE-2020-3951 is a low-severity memory corruption vulnerability in Vmware Workstation, published on 17 Mar 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

VMware Workstation (15.x before 15.5.2) and Horizon Client for Windows (5.x and prior before 5.4.0) contain a denial-of-service vulnerability due to a heap-overflow issue in Cortado Thinprint. Attackers with non-administrative access to a guest VM with virtual printing enabled may exploit this issue to create a denial-of-service condition of the Thinprint service running on the system where Workstation or Horizon Client is installed.

Weakness: CWE-787

Which versions are affected by CVE-2020-3951?

It affects 2 products.

Products include Vmware Horizon Client, Vmware Workstation.

How do I fix CVE-2020-3951?

No fix has been published for CVE-2020-3951 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-2020-3951 being exploited?

There is no known exploitation of CVE-2020-3951 in the wild and no public exploit code.

All Vmware Workstation vulnerabilities

Sources

Also known as GHSA-gj73-m2qr-829r.