#VU29303 Heap-based buffer overflow

Published: 2020-06-25

Vulnerability identifier: #VU29303

Vulnerability 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


Exploitation vector: Local

Exploit availability: No

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


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


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.

Latest bulletins with this vulnerability