SB2018050828 - Multiple vulnerabilities in Microsoft Hyper-V

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation (CVE-ID: CVE-2018-0961)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to an input validation error when processing vSMB packet data. An attacker running inside a virtual machine could run a specially crafted application that could cause the Hyper-V host operating system to execute arbitrary code.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable host system.

2) Improper input validation (CVE-ID: CVE-2018-0959)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote attacker to compromise vulnerable host operating system.

The vulnerability exists due to an error in Windows Hyper-V when processing input data from guest operating system. A remote attacker with access to guest operating system could run a specially crafted application and compromise the host system.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0961
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0959