Advisory Details

August 18th, 2020

Parallels Desktop prl_hypervisor Improper Input Validation Information Disclosure Vulnerability

ZDI-20-1011
ZDI-CAN-10520

CVE ID CVE-2020-17393
CVSS SCORE 6.5, (AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)
AFFECTED VENDORS Parallels
AFFECTED PRODUCTS Desktop
VULNERABILITY DETAILS

This vulnerability allows local attackers to disclose information on affected installations of Parallels Desktop. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the prl_hypervisor kext. The issue results from the lack of proper validation of user-supplied data, which can result a pointer to be leaked after the handler is done. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the kernel.

ADDITIONAL DETAILS Parallels has issued an update to correct this vulnerability. More details can be found at:
https://kb.parallels.com/en/125013
DISCLOSURE TIMELINE
  • 2020-04-01 - Vulnerability reported to vendor
  • 2020-08-18 - Coordinated public release of advisory
  • 2021-03-02 - Advisory Updated
CREDIT Reno Robert of Trend Micro Zero Day Initiative
BACK TO ADVISORIES