CVE-2020-3966

high-risk

Published 2020-06-25

VMware ESXi (7.0 before ESXi_7.0.0-1.20.16321839, 6.7 before ESXi670-202004101-SG and 6.5 before ESXi650-202005401-SG), Workstation (15.x before 15.5.2), and Fusion (11.x before 11.5.2) contain a heap-overflow due to a race condition issue in the USB 2.0 controller (EHCI). A malicious actor with local access to a virtual machine may be able to exploit this vulnerability to execute code on the hypervisor from a virtual machine. Additional conditions beyond the attacker's control must be present for exploitation to be possible.

Do I need to act?

0.04% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

LOCAL / HIGH complexity

Affected Products (20)

Cloud Foundation

Fusion

Workstation

Esxi

Affected Vendors

Vmware

References (4)

Vendor Advisory https://www.vmware.com/security/advisories/VMSA-2020-0015.html

Third Party Advisory https://www.zerodayinitiative.com/advisories/ZDI-20-783/

Vendor Advisory https://www.vmware.com/security/advisories/VMSA-2020-0015.html

Third Party Advisory https://www.zerodayinitiative.com/advisories/ZDI-20-783/

/ 100

high-risk

Severity 20/34 · Moderate

Exploitability 0/34 · Minimal

Exposure 33/34 · Critical