SB2020021114 - Multiple vulnerabilities in Microsoft Windows Hyper-V

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2020-0661)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user on the local network to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when Microsoft Hyper-V on a host server does not properly validate input from a privileged user on a guest operating system.

Successful exploitation of the vulnerability may result denial of service (DoS) attack against the host system.

2) Input validation error (CVE-ID: CVE-2020-0751)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system.

Successful exploitation of the vulnerability may result denial of service (DoS) attack against the target application.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0661
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0751