CVE-2021-31427 : Vulnerability Insights and Analysis

This CVE-2021-31427 article provides insights into a vulnerability in Parallels Desktop version 15.1.5-47309, allowing attackers to disclose sensitive information and potentially execute arbitrary code in the hypervisor context.

Understanding CVE-2021-31427

This section delves into the vulnerability description, impact, affected systems, exploitation mechanism, and mitigation strategies related to CVE-2021-31427.

What is CVE-2021-31427?

CVE-2021-31427 is a vulnerability in Parallels Desktop 15.1.5-47309 that enables local attackers to expose crucial information on the affected installations. The flaw exists within the Open Tools Gate component, arising from inadequate locking during object operations.

The Impact of CVE-2021-31427

The CVSS v3.0 base score of 7.3 categorizes this vulnerability as high severity. Attackers can leverage this issue to escalate privileges, execute arbitrary code within the hypervisor context, and compromise confidentiality.

Technical Details of CVE-2021-31427

This section outlines specifics of the vulnerability, including its description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability in Parallels Desktop 15.1.5-47309 stems from a Time-of-Check Time-of-Use (TOCTOU) race condition, which allows attackers to exploit object operations without proper locking, risking security.

Affected Systems and Versions

Parallels Desktop version 15.1.5-47309 is affected by this vulnerability, potentially putting users at risk of information disclosure and privilege escalation by malicious actors.

Exploitation Mechanism

To exploit CVE-2021-31427, attackers need access to execute low-privileged code on the guest system, later utilizing the flaw in the Open Tools Gate component to perform privilege escalation and execute arbitrary code in the hypervisor context.

Mitigation and Prevention

This section covers immediate actions to take, long-term security practices, and the importance of patching and updates to prevent exploitation of CVE-2021-31427.

Immediate Steps to Take

Users should update Parallels Desktop to a patched version, restrict guest system access, and monitor for suspicious activities to mitigate the vulnerability's impact.

Long-Term Security Practices

Implementing least privilege access, maintaining regular security audits, and educating users on safe computing practices are vital for long-term defense against such vulnerabilities.

Patching and Updates

Regularly check for security updates from Parallels, apply patches promptly, and stay informed about the latest security best practices to safeguard systems against known vulnerabilities.