CVE-2019-0928 : Security Advisory and Response

A denial of service vulnerability in Microsoft Hyper-V on a host server allows an authorized user on a guest operating system to execute a 'Windows Hyper-V Denial of Service Vulnerability'.

Understanding CVE-2019-0928

This CVE identifies a specific vulnerability in Microsoft Hyper-V that can lead to a denial of service attack.

What is CVE-2019-0928?

The vulnerability in Microsoft Hyper-V on a host server occurs due to inadequate verification of input from an authorized user on a guest operating system, resulting in a denial of service threat.

The Impact of CVE-2019-0928

The presence of this vulnerability can allow an attacker to disrupt services, leading to potential downtime and system unavailability.

Technical Details of CVE-2019-0928

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerability in Microsoft Hyper-V allows a privileged user on a guest operating system to execute a denial of service attack by exploiting inadequate input validation on the host server.

Affected Systems and Versions

The following systems and versions are affected:

Windows 10 for x64-based Systems
Windows 10 Version 1607 for x64-based Systems
Windows 10 Version 1703 for x64-based Systems
Windows 10 Version 1709 for x64-based Systems
Windows 10 Version 1803 for x64-based Systems
Windows Server 2016
Windows Server 2016 (Core installation)
Windows Server version 1803 (Core Installation)

Exploitation Mechanism

The vulnerability can be exploited by an authorized user on a guest operating system sending specially crafted input to the host server, causing a denial of service condition.

Mitigation and Prevention

Protecting systems from CVE-2019-0928 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by Microsoft promptly.
Monitor system logs for any unusual activities that could indicate an ongoing attack.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch all software and systems to prevent known vulnerabilities.
Conduct security training for users to recognize and report suspicious activities.
Employ intrusion detection and prevention systems to monitor and block malicious traffic.

Patching and Updates

Ensure that all affected systems are updated with the latest security patches released by Microsoft to mitigate the vulnerability.