Advisory Details

March 13th, 2020

Parallels Desktop xHCI Time-Of-Check Time-Of-Use Privilege Escalation Vulnerability

CVE ID	CVE-2020-8873
CVSS SCORE	8.2, AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
AFFECTED VENDORS	Parallels
AFFECTED PRODUCTS	Desktop
VULNERABILITY DETAILS	This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop. 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. The issue results from the lack of proper locking when performing operations on an object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the hypervisor.
ADDITIONAL DETAILS	Fixed in version 15.1.3 (47255)
DISCLOSURE TIMELINE	2020-02-21 - Vulnerability reported to vendor 2020-03-13 - Coordinated public release of advisory 2021-03-02 - Advisory Updated
CREDIT	Reno Robert of Trend Micro Zero Day Initiative

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