CVE-2020-3968

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 15.5.5), and Fusion (11.x before 11.5.5) contain an out-of-bounds write vulnerability in the USB 3.0 controller (xHCI). A malicious actor with local administrative privileges on a virtual machine may be able to exploit this issue to crash the virtual machine's vmx process leading to a denial of service condition or 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?

0.03% 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 8.2/10 High

LOCAL / LOW 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-20-781/

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

Third Party Advisory https://www.zerodayinitiative.com/advisories/ZDI-20-781/

/ 100

high-risk

Severity 25/34 · High

Exploitability 0/34 · Minimal

Exposure 33/34 · Critical