CVE-2021-31426 Integer overflow in Desktop

High 8.8 Published 29 Apr 2021 Updated 3 Aug 2024

Local attackers can escalate privileges and execute arbitrary code in the kernel via an integer overflow in Parallels Tools.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-31426?

CVE-2021-31426 is a high-severity vulnerability in Parallels Parallels Desktop, published on 29 Apr 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.2-49151. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the Parallels Tools component. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel on the target guest system. Was ZDI-CAN-12791.

Weakness: CWE-190

Which versions are affected by CVE-2021-31426?

It affects 1 product.

Products include Parallels Parallels Desktop.

How do I fix CVE-2021-31426?

No fix has been published for CVE-2021-31426 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-31426 being exploited?

There is no known exploitation of CVE-2021-31426 in the wild and no public exploit code.

All Parallels Parallels Desktop vulnerabilities

Sources

Also known as GHSA-4gp2-5wrm-9g4v.