CVE-2021-27243 : Security Advisory and Response

This CVE-2021-27243 article provides detailed information about a vulnerability in Parallels Desktop 16.0.1-48919 that allows local attackers to escalate privileges through the Toolgate component.

Understanding CVE-2021-27243

This section explains the vulnerability, its impact, technical details, and mitigation steps.

What is CVE-2021-27243?

CVE-2021-27243 is a security flaw in Parallels Desktop 16.0.1-48919 that enables local attackers to elevate privileges by exploiting an integer overflow issue in the Toolgate component.

The Impact of CVE-2021-27243

The vulnerability has a high severity score, allowing attackers to execute arbitrary code with escalated privileges within the hypervisor context, potentially compromising the system integrity, confidentiality, and availability.

Technical Details of CVE-2021-27243

This section delves into the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The vulnerability stems from inadequate validation of user-supplied data, leading to an integer overflow that can result in a buffer allocation, allowing attackers to escalate privileges.

Affected Systems and Versions

Parallels Desktop 16.0.1-48919 is specifically affected by this vulnerability.

Exploitation Mechanism

Attackers need the ability to execute low-privileged code on the target guest system to exploit this vulnerability and elevate their privileges.

Mitigation and Prevention

Learn about immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Users are advised to update Parallels Desktop to the latest version, apply security patches promptly, and monitor system activity for any signs of exploitation.

Long-Term Security Practices

Implement strict privilege management, conduct regular security assessments, and educate users on safe computing practices to reduce the risk of future vulnerabilities.

Patching and Updates

Regularly check for software updates from Parallels and other trusted sources to ensure that security patches are applied in a timely manner.