CVE-2021-34864 : Exploit Details and Defense Strategies

This article discusses the details of CVE-2021-34864, a vulnerability affecting Parallels Desktop 16.1.3 (49160) that allows local attackers to escalate privileges. Learn about the impact, technical details, and mitigation steps associated with this CVE.

Understanding CVE-2021-34864

CVE-2021-34864 is a security vulnerability in Parallels Desktop 16.1.3 (49160) that enables local attackers to elevate their privileges on the target system. The flaw exists within the WinAppHelper component due to improper access control.

What is CVE-2021-34864?

This vulnerability enables attackers with low-privileged code execution capabilities on the target guest system to escalate their privileges. By exploiting this flaw, an attacker can execute arbitrary code within the hypervisor's context.

The Impact of CVE-2021-34864

With a CVSS base score of 8.8 and a high severity level, CVE-2021-34864 poses a significant risk to affected systems. Attackers can exploit this vulnerability to gain high privileges, potentially leading to unauthorized system access, data breaches, and other malicious activities.

Technical Details of CVE-2021-34864

CVE-2021-34864 has the following technical details:

Vulnerability Description

The vulnerability arises from a lack of proper access control within the WinAppHelper component of Parallels Desktop 16.1.3 (49160).

Affected Systems and Versions

Parallels Desktop version 16.1.3 (49160) is impacted by this vulnerability.

Exploitation Mechanism

Local attackers need the ability to execute low-privileged code on the target system to exploit this vulnerability.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-34864, consider the following steps:

Immediate Steps to Take

Update Parallels Desktop to a patched version that addresses the vulnerability.
Monitor system logs and behavior for any suspicious activities.

Long-Term Security Practices

Implement the principle of least privilege to restrict user permissions.
Conduct regular security assessments and audits to identify and remediate vulnerabilities.

Patching and Updates

Stay informed about security updates and patches released by Parallels. Apply updates promptly to protect your system from known vulnerabilities.