CVE-2021-34854: (Pwn2Own) Parallels Desktop Toolgate Uncontrolled Memory Allocation Privilege Escalation Vulnerability
First published: Mon Oct 25 2021(Updated: )
This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.3 (49160). 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 validation of user-supplied data, which can result in an uncontrolled memory allocation. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13544.
Credit: zdi-disclosures@trendmicro.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Parallels Desktop | =16.1.3 | |
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Reference Links
Frequently Asked Questions
What is CVE-2021-34854?
CVE-2021-34854 is a vulnerability that allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.3 (49160).
How can this vulnerability be exploited?
To exploit this vulnerability, an attacker must first obtain the ability to execute low-privileged code on the target guest system.
What is the severity of CVE-2021-34854?
The severity of CVE-2021-34854 is high with a CVSS score of 7.8.
How can I fix this vulnerability?
To fix this vulnerability, it is recommended to update Parallels Desktop to version 16.1.4 or later.
Where can I find more information about CVE-2021-34854?
More information about CVE-2021-34854 can be found in the Parallels Knowledge Base article and the Zero Day Initiative advisory.
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