Advisory Details

March 13th, 2020

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

ZDI-20-294
ZDI-CAN-10031

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
CREDIT Reno Robert
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