Information disclosure in VMware ESXi, Fusion, Workstation and Cloud Foundation

Published: 2020-06-25
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-3971
Exploitation vector Local
Public exploit N/A
Vulnerable software
VMware ESXi
Operating systems & Components / Operating system

VMware Fusion
Client/Desktop applications / Virtualization software

VMware Workstation
Client/Desktop applications / Virtualization software

Cloud Foundation
Client/Desktop applications / Virtualization software

Vendor VMware, Inc

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Heap-based buffer overflow

EUVDB-ID: #VU29303

Risk: Low


CVE-ID: CVE-2020-3971

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No


The vulnerability allows a local attacker to gain access to sensitive information on the system.

The vulnerability exists due to a boundary error in the vmxnet3 virtual network adapter. A local attacker can pass specially crafted data to the applicatoin, trigger heap-based buffer overflow and read privileged information contained in hypervisor memory from a virtual machine.


Install updates from vendor's website.

Vulnerable software versions

VMware ESXi: 6.5 - 6.7

VMware Fusion: 11.0.0 - 11.0.1

VMware Workstation: 15.0.0 - 15.0.1

Cloud Foundation: 3.0 - 3.7.1

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?