#VU28338 Time-of-check Time-of-use (TOCTOU) Race Condition


Published: 2021-03-07

Vulnerability identifier: #VU28338

Vulnerability risk: Low

CVSSv3.1:

CVE-ID: CVE-2020-3957

CWE-ID: N/A

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
VMware Fusion
Client/Desktop applications / Virtualization software
VMRC
Client/Desktop applications / Software for system administration
VMware Horizon Client
Client/Desktop applications / Software for system administration

Vendor: VMware, Inc

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a Time-of-check Time-of-use (TOCTOU) issue in the service opener. An local user can gain elevated privileges on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

VMware Fusion: 11.0.0 - 11.5.3

VMRC: 8.0.0 - 11.1.0

VMware Horizon Client: 3.0.0 - 5.4


CPE

External links
http://www.vmware.com/security/advisories/VMSA-2020-0011.html


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


Latest bulletins with this vulnerability