CVE-2020-1243: Windows Hyper-V Denial of Service Vulnerability
First published: Fri Oct 16 2020(Updated: )
<p>A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system.</p> <p>To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application.</p> <p>The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to handle these requests.</p>
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Windows 10 | =1607 | |
| Windows 10 | =1709 | |
| Windows 10 | =1803 | |
| Windows 10 | =1809 | |
| Windows 10 | =1903 | |
| Windows 10 | =2004 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | =1903 | |
| Microsoft Windows Server 2016 | =1909 | |
| Microsoft Windows Server 2016 | =2004 | |
| Microsoft Windows Server 2019 |
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Frequently Asked Questions
What is the severity of CVE-2020-1243?
CVE-2020-1243 has a CVSS score that indicates a high severity level due to the potential for denial-of-service attacks.
How do I fix CVE-2020-1243?
To mitigate CVE-2020-1243, update Microsoft Hyper-V to the latest security patch provided by Microsoft.
Who is affected by CVE-2020-1243?
CVE-2020-1243 affects Microsoft Hyper-V on certain versions of Windows 10 and Windows Server as specified in the advisory.
What type of vulnerability is CVE-2020-1243?
CVE-2020-1243 is classified as a denial-of-service vulnerability originating from improper validation of data.
Can CVE-2020-1243 be exploited remotely?
No, CVE-2020-1243 can only be exploited by an attacker with a privileged account on a guest operating system.
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