CVE-2021-31425 : What You Need to Know

This CVE-2021-31425 article provides detailed information about a vulnerability in Parallels Desktop version 16.1.2-49151 that allows local attackers to escalate privileges.

Understanding CVE-2021-31425

This section delves into the specifics of the CVE-2021-31425 vulnerability found in Parallels Desktop version 16.1.2-49151.

What is CVE-2021-31425?

CVE-2021-31425 is a vulnerability in Parallels Desktop that enables local attackers to elevate privileges by exploiting an issue in the Parallels Tools component. The lack of proper validation of user-supplied data leads to an integer overflow, allowing an attacker to execute arbitrary code in the kernel's context on the target system.

The Impact of CVE-2021-31425

The vulnerability's impact is rated as HIGH, with an overall CVSS v3.0 base score of 8.8. It affects confidentiality, integrity, and availability, requiring low privileges for exploitation and resulting in a significant threat.

Technical Details of CVE-2021-31425

This section provides technical insights into the CVE-2021-31425 vulnerability affecting Parallels Desktop.

Vulnerability Description

The security flaw arises due to the lack of proper validation of user-supplied data in Parallels Desktop version 16.1.2-49151, leading to an integer overflow within the Parallels Tools component. This overflow can eventually enable an attacker to escalate privileges and execute arbitrary code in the kernel's context.

Affected Systems and Versions

Parallels Desktop version 16.1.2-49151 is specifically impacted by this vulnerability, exposing systems with this version to potential exploitation by local attackers.

Exploitation Mechanism

To exploit CVE-2021-31425, an attacker first needs the ability to execute low-privileged code on the target guest system. By leveraging the integer overflow in Parallels Desktop, the attacker can then escalate privileges and run malicious code within the kernel's context.

Mitigation and Prevention

Protecting systems against CVE-2021-31425 involves immediate actions and long-term security measures to prevent exploitation and secure affected systems.

Immediate Steps to Take

Users are advised to update Parallels Desktop to a patched version to mitigate the vulnerability. Additionally, limiting user permissions and monitoring system activity can reduce the risk of exploitation.

Long-Term Security Practices

Implementing robust input validation mechanisms, regular security audits, and staying informed about software security updates are crucial for enhancing long-term system security.

Patching and Updates

Stay informed about security patches and updates released by Parallels for Parallels Desktop to address CVE-2021-31425 and other potential vulnerabilities.