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

CVSSv3.1: 4.5 [CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

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?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.