Windows Hyper-V Denial of Service Vulnerability
CVE-2020-1243 is fixed in 14 products on 1 platform, first by KB4580346, released October 13, 2020. It is not reported as exploited. Patch Radar priority: High.
<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>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows 10 Version 1607 for x64-based Systems | 14393.3986 | KB4580346 | Oct 13, 2020 |
| Windows 10 Version 1709 for x64-based Systems | 16299.2166 | KB4580328 | Oct 13, 2020 |
| Windows 10 Version 1803 for x64-based Systems | 17134.1792 | KB4580330 | Oct 13, 2020 |
| Windows 10 Version 1809 for x64-based Systems | 17763.1518 | KB4577668 | Oct 13, 2020 |
| Windows 10 Version 1903 for x64-based Systems | KB4577671 | Oct 13, 2020 | |
| Windows 10 Version 1909 for x64-based Systems | KB4577671 | Oct 13, 2020 | |
| Windows 10 Version 2004 for x64-based Systems | 19041.572 | KB4579311 | Oct 13, 2020 |
| Windows Server 2016 | 14393.3986 | KB4580346 | Oct 13, 2020 |
| Windows Server 2016 (Server Core installation) | 14393.3986 | KB4580346 | Oct 13, 2020 |
| Windows Server 2019 | 17763.1518 | KB4577668 | Oct 13, 2020 |
| Windows Server 2019 (Server Core installation) | 17763.1518 | KB4577668 | Oct 13, 2020 |
| Windows Server, version 1903 (Server Core installation) | KB4577671 | Oct 13, 2020 | |
| Windows Server, version 1909 (Server Core installation) | KB4577671 | Oct 13, 2020 | |
| Windows Server, version 2004 (Server Core installation) | 19041.572 | KB4579311 | Oct 13, 2020 |
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