CVE-2021-34856: (Pwn2Own) Parallels Desktop virtio-gpu Memory Corruption 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 high-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the virtio-gpu virtual device. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13581.
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-2021-34856?
CVE-2021-34856 is a vulnerability in Parallels Desktop that allows local attackers to escalate privileges on affected installations.
How can this vulnerability be exploited?
To exploit CVE-2021-34856, an attacker must first obtain the ability to execute high-privileged code on the target guest system.
What is the severity of CVE-2021-34856?
CVE-2021-34856 has a severity rating of 8.8 (high).
Which software versions are affected by CVE-2021-34856?
CVE-2021-34856 affects Parallels Desktop 16.1.3 (49160).
How can I fix CVE-2021-34856?
To fix CVE-2021-34856, it is recommended to update to the latest version of Parallels Desktop and apply any available patches or security updates.
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