CVE-2020-0890 PoC — Windows Hyper-V Denial of Service Vulnerability

Source

https://github.com/gerhart01/hyperv_local_dos_poc

Associated Vulnerability

Title: Windows Hyper-V Denial of Service Vulnerability (CVE-2020-0890)
Description: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. 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. The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to handle these requests.

Description

CVE-2020-0890 | Windows Hyper-V Denial of Service Vulnerability proof-of-concept code

Readme

Hyper-V DoS PoC.
This is code files of Visual Studio 2019 driver project. 
1. Compile driver.
2. Enable nested virtualization for guest OS using command:

```
Set-VMProcessor -VMName <VMName> -ExposeVirtualizationExtensions $true
```
3. Run driver inside guest OS. Host OS will be rebooted or generate BSOD with HYPERVISOR_ERROR code.

Bug is present in Hyper-V from Windows Server 2019, Windows 10 with latest patches and
Windows 10 insider preview, build 10.0.20206.1000 and early.

Mitigations:
Simple disable nested virtualization on untrusted VM. Execute command on host server:

```
Set-VMProcessor -VMName <VMName> -ExposeVirtualizationExtensions $false
```

File Snapshot

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