CVE-2020-3957 Race condition in VMware Fusion

What is CVE-2020-3957?

CVE-2020-3957 is a high-severity vulnerability in Vmware Fusion, published on 29 May 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

VMware Fusion (11.x before 11.5.5), VMware Remote Console for Mac (11.x and prior) and VMware Horizon Client for Mac (5.x and prior) contain a local privilege escalation vulnerability due to a Time-of-check Time-of-use (TOCTOU) issue in the service opener. Successful exploitation of this issue may allow attackers with normal user privileges to escalate their privileges to root on the system where Fusion, VMRC and Horizon Client are installed.

Weakness: CWE-367

Which versions are affected by CVE-2020-3957?

It affects 3 products.

Products include Vmware Fusion, Vmware Horizon Client, Vmware Remote Console.

How do I fix CVE-2020-3957?

No fix has been published for CVE-2020-3957 yet. Limit exposure of the affected software until one is available.

Is CVE-2020-3957 being exploited?

There is no known exploitation of CVE-2020-3957 in the wild and no public exploit code.

Other vulnerabilities in Vmware Fusion

• CVE-2020-3950 VMware Multiple Products Privilege Escalation Exploited High 7.8
• CVE-2017-4901 Memory corruption in Fusion Pro / Fusion Critical 9.9
• CVE-2024-22267 Use after free in VMware Fusion Critical 9.3
• CVE-2019-5541 Memory corruption in Workstation and Fusion Critical 9.1
• CVE-2024-38811 Code-execution vulnerability High 8.8

All Vmware Fusion vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jj4f-vfw3-qv39.