#VU26073 Use-after-free in VMware Workstation and VMware Fusion - CVE-2020-3947

Vulnerability identifier: #VU26073

Vulnerability risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-3947

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
VMware Workstation
Client/Desktop applications / Virtualization software
VMware Fusion
Client/Desktop applications / Virtualization software

Vendor: VMware, Inc

Description

The vulnerability allows a local attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in vmnetdhcp. A local attacker can execute arbitrary code on the host from the guest or cause a denial-of-service condition of the vmnetdhcp service running on the host machine.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

VMware Workstation: 15.0.0 - 15.5.1

VMware Fusion: 11.0.0 - 11.5.1

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External links
https://www.vmware.com/security/advisories/VMSA-2020-0004.html
https://www.zerodayinitiative.com/advisories/ZDI-20-298/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.