Advisory Details

June 30th, 2020

VMware Workstation xHCI Isoch TD Out-Of-Bounds Write Privilege Escalation Vulnerability

CVE ID	CVE-2020-3968
CVSS SCORE	8.2, AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
AFFECTED VENDORS	VMware
AFFECTED PRODUCTS	Workstation
VULNERABILITY DETAILS	This vulnerability allows local attackers to escalate privileges 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 xHCI component. When parsing Isoch Transfer Descriptor (TD), the process does not properly validate user-supplied data that can result in a write past the end of an allocated object. An attacker can leverage this vulnerability to escalate privileges and 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-2020-0015.html
DISCLOSURE TIMELINE	2020-02-04 - Vulnerability reported to vendor 2020-06-30 - Coordinated public release of advisory 2021-03-02 - Advisory Updated
CREDIT	Reno Robert of Trend Micro Zero Day Initiative

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