CVE-2020-3947 Use after free in Fusion
A use-after-free flaw in vmnetdhcp allows guest-to-host code execution or denial of service in VMware Workstation and Fusion.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-3947?
CVE-2020-3947 is a high-severity use after free vulnerability in Vmware Fusion, published on 16 Mar 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
VMware Workstation (15.x before 15.5.2) and Fusion (11.x before 11.5.2) contain a use-after vulnerability in vmnetdhcp. Successful exploitation of this issue may lead to code execution on the host from the guest or may allow attackers to create a denial-of-service condition of the vmnetdhcp service running on the host machine.
Weakness: CWE-416
Which versions are affected by CVE-2020-3947?
It affects 2 products.
Products include Vmware Fusion, Vmware Workstation.
How do I fix CVE-2020-3947?
No fix has been published for CVE-2020-3947 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-3947 being exploited?
There is no known exploitation of CVE-2020-3947 in the wild and no public exploit code.
Other vulnerabilities in Vmware Fusion
Sources
Also known as GHSA-mxvf-68x6-jqvh.