Advisory Details

October 20th, 2020

VMware Workstation BDOOR_CMD_PATCH_ACPI_TABLES Time-Of-Check Time-Of-Use Information Disclosure Vulnerability

CVE ID	CVE-2020-3981
CVSS SCORE	6.0, AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
AFFECTED VENDORS	VMware
AFFECTED PRODUCTS	Workstation
VULNERABILITY DETAILS	This vulnerability allows local attackers to disclose sensitive information on affected installations of VMware Workstation. An attacker must first obtain the ability to execute high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the implementation of the BDOOR_CMD_PATCH_ACPI_TABLES command. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the hypervisor.
ADDITIONAL DETAILS	VMware has issued an update to correct this vulnerability. More details can be found at: https://www.vmware.com/security/advisories/VMSA-2020-0023.html
DISCLOSURE TIMELINE	2020-06-18 - Vulnerability reported to vendor 2020-10-20 - Coordinated public release of advisory 2021-03-02 - Advisory Updated
CREDIT	Reno Robert of Trend Micro Zero Day Initiative

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