CVE-2021-31422 : Vulnerability Insights and Analysis

This article provides detailed information about CVE-2021-31422, a vulnerability that allows local attackers to escalate privileges on affected installations of Parallels Desktop 16.1.1-49141.

Understanding CVE-2021-31422

CVE-2021-31422 is a vulnerability within Parallels Desktop 16.1.1-49141 that enables local attackers to elevate privileges on the target guest system by exploiting a flaw in the e1000e virtual device.

What is CVE-2021-31422?

CVE-2021-31422 allows attackers to execute high-privileged code on affected Parallels Desktop installations, leading to privilege escalation. The vulnerability arises from improper locking during operations, enabling attackers to run arbitrary code in the hypervisor context.

The Impact of CVE-2021-31422

The impact of CVE-2021-31422 is rated as HIGH based on the CVSS v3.0 metrics. It requires high privileges on the target system and can result in confidentiality, integrity, and availability loss.

Technical Details of CVE-2021-31422

CVE-2021-31422 is classified as a Time-of-check Time-of-use (TOCTOU) Race Condition vulnerability (CWE-367).

Vulnerability Description

The vulnerability arises due to the lack of proper locking during operations on the e1000e virtual device in Parallels Desktop 16.1.1-49141.

Affected Systems and Versions

Parallels Desktop version 16.1.1-49141 is affected by this vulnerability, allowing local attackers to exploit it.

Exploitation Mechanism

Attackers need the ability to execute high-privileged code on the target system to exploit this vulnerability, which results in privilege escalation and arbitrary code execution.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-31422, immediate steps should be taken.

Immediate Steps to Take

Users are advised to apply patches and updates from Parallels to address CVE-2021-31422 and prevent exploitation.

Long-Term Security Practices

Implementing proper security measures, such as regular software updates and system hardening, can help prevent similar vulnerabilities in the future.

Patching and Updates

Regularly check for security updates and patches from Parallels to ensure the protection of systems against CVE-2021-31422.