Advisory Details

March 7th, 2023

Parallels Desktop Updater Time-Of-Check Time-Of-Use Local Privilege Escalation Vulnerability

ZDI-23-217
ZDI-CAN-18150

CVE ID CVE-2023-27323
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 Updater service. By creating a symbolic link, an attacker can abuse the service to execute a file. 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
  • 2022-08-31 - Vulnerability reported to vendor
  • 2023-03-07 - Coordinated public release of advisory
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