Advisory Details

March 13th, 2020

Parallels Desktop VGA Out-Of-Bounds Write Privilege Escalation Vulnerability

ZDI-20-292
ZDI-CAN-9403

CVE ID CVE-2020-8871
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 VGA virtual device. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. 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
  • 2019-11-14 - Vulnerability reported to vendor
  • 2020-03-13 - Coordinated public release of advisory
CREDIT Reno Robert
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