Advisory Details

August 18th, 2020

Parallels Desktop prl_hypervisor Incorrect Permission Assignment for Critical Resource Information Disclosure Vulnerability

ZDI-20-1020
ZDI-CAN-11063

CVE ID CVE-2020-17402
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 sensitive 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. By examining a log file, an attacker can disclose a memory address. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute 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
  • 2020-07-15 - Vulnerability reported to vendor
  • 2020-08-18 - Coordinated public release of advisory
CREDIT singi@theori
BACK TO ADVISORIES