CVE-2020-17399 : Exploit Details and Defense Strategies

This vulnerability allows local attackers to escalate privileges on affected installations of Parallels Desktop 15.1.4. An attacker must first obtain the ability to execute low-privileged code on the target system to exploit this flaw. The issue lies within the prl_hypervisor kext due to improper validation of user-supplied data, leading to a buffer overflow. Attackers can leverage this to escalate privileges and execute code in the kernel.

Understanding CVE-2020-17399

This CVE affects Parallels Desktop 15.1.4, allowing local attackers to elevate privileges through a kernel exploit.

What is CVE-2020-17399?

Local attackers can escalate privileges on Parallels Desktop 15.1.4
Exploitation requires executing low-privileged code on the target system
Vulnerability exists in the prl_hypervisor kext due to improper data validation

The Impact of CVE-2020-17399

CVSS Score: 8.8 (High)
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Privileges Required: Low
Scope: Changed

Technical Details of CVE-2020-17399

This section provides in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw allows attackers to write past the end of an allocated buffer
Exploitation can lead to privilege escalation and code execution in the kernel

Affected Systems and Versions

Affected Product: Parallels Desktop
Affected Version: 15.1.4

Exploitation Mechanism

Attackers need to execute low-privileged code on the target system
Lack of proper validation of user-supplied data leads to buffer overflow

Mitigation and Prevention

Protect systems from CVE-2020-17399 with the following measures:

Immediate Steps to Take

Apply security patches promptly
Monitor system logs for any unusual activities
Restrict access to critical systems

Long-Term Security Practices

Regularly update and patch software
Conduct security training for employees
Implement the principle of least privilege

Patching and Updates

Ensure Parallels Desktop is updated to the latest version
Follow vendor recommendations for security best practices