Parallels Desktop 16.5.1 HDAudio Virtual Device buffer overflow

Summaryinfo

A vulnerability was found in Parallels Desktop 16.5.1. It has been declared as critical. Impacted is an unknown function of the component HDAudio Virtual Device. The manipulation results in buffer overflow. This vulnerability is known as CVE-2021-34987. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Parallels Desktop 16.5.1. It has been classified as critical. Affected is some unknown processing of the component HDAudio Virtual Device. The manipulation with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.5.1 (49187). 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 HDAudio virtual device. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-14969.

The weakness was published 07/16/2022. The advisory is shared for download at zerodayinitiative.com. This vulnerability is traded as CVE-2021-34987 since 06/17/2021. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/01/2022).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Parallels

Name

• Desktop

Version

• 16.5.1

License

• commercial

Website

• Vendor: https://www.parallels.com/

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