SB2021071329 - Multiple vulnerabilities in Microsoft Windows Hyper-V

Description

This security bulletin contains information about 3 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2021-33755)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the Windows Hyper-V. A remote authenticated attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

2) Input validation error (CVE-ID: CVE-2021-33758)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the Windows Hyper-V. A remote authenticated attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

3) Code Injection (CVE-ID: CVE-2021-34450)

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation in the Windows Hyper-V. A remote authenticated attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33755
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33758
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34450