CVE-2020-0904: 
vulnerability analysis and mitigation

A denial of service vulnerability (CVE-2020-0904) was identified in Microsoft Hyper-V, where the host server fails to properly validate specific malicious data from a user on a guest operating system. The vulnerability was initially recorded on November 4, 2019, and affects Microsoft Hyper-V systems (CVE Details).

The vulnerability has been assigned a CVSS v3.1 Base Score of 6.5 (MEDIUM) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H. The vulnerability is classified under CWE-20 (Improper Input Validation). Under CVSS v2.0, it received a Base Score of 2.1 (LOW) with the vector (AV:L/AC:L/Au:N/C:N/I:N/A:P) (NVD).

The vulnerability can result in a denial of service condition affecting the Microsoft Hyper-V host server. When successfully exploited, it could potentially disrupt the normal operation of the host server, impacting the availability of virtual machines running on the affected system (NVD).

Microsoft has released a security update that addresses the vulnerability by resolving the conditions where Hyper-V would fail to handle malicious requests. The fix is implemented through proper validation of input from guest operating systems (Microsoft Advisory).