CVE-2021-31418: Parallels Desktop Toolgate Uninitialized Memory Information Disclosure Vulnerability

Published Apr 29, 2021

Updated

This vulnerability allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 15.1.4-47270. An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the Toolgate component. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-12221.

Other sources

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 guest system in order to exploit this vulnerability. The specific flaw exists within the Toolgate component. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the hypervisor.

Affected Software

2 affected components

Parallels Parallels Desktop=15.1.4-47270

Parallels Desktop

Event History

Apr 29, 2021

CVE Published

via MITRE·04:31 PM

Data Sourced

via MITRE·04:31 PM

DescriptionSeverityWeakness

Mar 24, 2025

Advisory Published

via ZDI·07:01 PM

Frequently Asked Questions

What is CVE-2021-31418?

CVE-2021-31418 is a vulnerability that allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 15.1.4-47270.

What is the severity of CVE-2021-31418?

The severity of CVE-2021-31418 is medium with a CVSS score of 6.5.

How does CVE-2021-31418 work?

CVE-2021-31418 allows an attacker to disclose sensitive information on the target guest system by exploiting an uninitialized memory flaw in Parallels Desktop 15.1.4-47270.

What is the affected software?

The affected software is Parallels Desktop 15.1.4-47270.

How can CVE-2021-31418 be fixed?

To fix CVE-2021-31418, users should update Parallels Desktop to a patched version as recommended by the vendor.