VMware Security Announcement VMSA-2020-0014

Today VMware released VMSA-2020-0014. This affects VMware Tools for macOS and addresses a denial-of-service vulnerability (CVE-2020-3972)

Impacted Products
  • VMware Tools for macOS
Introduction

A denial-of-service vulnerability affecting VMware Tools for macOS was privately reported to VMware. Updates are available to address this vulnerability in affected VMware products.

Advisory Details

Description

VMware Tools for macOS contains a denial-of-service vulnerability in the Host-Guest File System (HGFS) implementation. VMware has evaluated the severity of this issue to be in the Low severity range with a maximum CVSSv3 base score of 3.3.

Known Attack Vendors

Successful exploitation of this issue may allow attackers with non-admin privileges on guest macOS virtual machines to create a denial-of-service condition on their own VMs.

In order to exploit this vulnerability, the following conditions must be fulfilled:
1) Guest and host operating system must be macOS.
2) Shared folders (HGFS) must be enabled, and a folder (that includes at-least one file) must be selected from the host system to be shared. No folders are shared by default in any version of our products, which means this vulnerability is not exploitable by default.  

Resolution

To remediate CVE-2020-3972 apply VMware Tools for macOS version 11.1.1, Download links are provided in the references section.

References

Fixed Version(s) and Release Notes:

VMware Tools for macOS 11.1.1


Downloads and Documentation:

https://my.vmware.com/web/vmware/details?downloadGroup=VMTOOLS1111&productId=975
https://docs.vmware.com/en/VMware-Tools/11.1/rn/VMware-Tools-1111-Release-Notes.html

Here is a link to the official advisory from VMWare.

https://www.vmware.com/security/advisories/VMSA-2020-0014.html