CVE-2019-0712 : Vulnerability Insights and Analysis

A vulnerability in Microsoft Hyper-V Network Switch on a host server can be exploited by a privileged user on a guest operating system, leading to a denial of service. This vulnerability is known as 'Windows Hyper-V Denial of Service Vulnerability' and has a different CVE ID than CVE-2019-1309, CVE-2019-1310, CVE-2019-1399.

Understanding CVE-2019-0712

This CVE involves a denial of service vulnerability in Microsoft Hyper-V Network Switch.

What is CVE-2019-0712?

This vulnerability occurs when the Hyper-V Network Switch fails to properly validate input from a privileged user on a guest OS, resulting in a denial of service attack.

The Impact of CVE-2019-0712

The vulnerability allows a privileged user on a guest OS to exploit the Hyper-V Network Switch on the host server, causing a denial of service.

Technical Details of CVE-2019-0712

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability lies in the Microsoft Hyper-V Network Switch on a host server, where input validation from a privileged user on a guest OS is inadequate.

Affected Systems and Versions

The following systems and versions are affected:

Windows 7 for x64-based Systems Service Pack 1
Windows 8.1 for x64-based systems
Windows 10 for x64-based Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1709 for x64-based Systems
Windows 10 Version 1803 for x64-based Systems
Windows 10 Version 1809 for x64-based Systems
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Core installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1
Windows Server 2012
Windows Server 2012 (Core installation)
Windows Server 2012 R2
Windows Server 2012 R2 (Core installation)
Windows Server 2016
Windows Server 2016 (Core installation)
Windows Server version 1803 (Core Installation)
Windows Server 2019
Windows Server 2019 (Core installation)
Windows Server 2008 for x64-based Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2 (Core installation)
Windows 10 Version 1903 for x64-based Systems
Windows Server version 1903 (Server Core installation)

Exploitation Mechanism

The vulnerability can be exploited by a privileged user on a guest OS to trigger a denial of service attack on the host server through the Hyper-V Network Switch.

Mitigation and Prevention

To address CVE-2019-0712, follow these mitigation steps:

Immediate Steps to Take

Apply the necessary security updates provided by Microsoft.
Monitor network traffic for any suspicious activity.
Restrict access to critical systems and services.

Long-Term Security Practices

Regularly update and patch all systems and software.
Implement the principle of least privilege to limit user access.
Conduct regular security training for employees to raise awareness.

Patching and Updates

Ensure that all affected systems and versions are updated with the latest security patches from Microsoft.