Advisory Details

March 7th, 2023

Parallels Desktop Service Improper Initialization Local Privilege Escalation Vulnerability

ZDI-23-216
ZDI-CAN-17751

CVE ID CVE-2023-27322
CVSS SCORE 7.8, AV:L/AC:L/PR:L/UI:N/S:U/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 low-privileged code on the target host system in order to exploit this vulnerability.

The specific flaw exists within the Parallels Service. The issue results from the lack of proper initialization of environment variables. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.

ADDITIONAL DETAILS Parallels has issued an update to correct this vulnerability. More details can be found at:
https://kb.parallels.com/125013
DISCLOSURE TIMELINE
  • 2022-08-19 - Vulnerability reported to vendor
  • 2023-03-07 - Coordinated public release of advisory
CREDIT Grisha Levit
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