SB2018100922 - Privilege escalation in Microsoft Windows Hyper-V

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation (CVE-ID: CVE-2018-8489)

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 an adjacent attacker to compromise vulnerable host operating system.

The vulnerability exists in Windows Hyper-V on a host server due to improper validation of input from an authenticated user on a guest operating system. A remote attacker with access to guest operating system can run a specially crafted application and compromise the host system.

2) Improper input validation (CVE-ID: CVE-2018-8490)

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 an adjacent attacker to compromise vulnerable host operating system.

The vulnerability exists in Windows Hyper-V on a host server due to improper validation of input from an authenticated user on a guest operating system. A remote attacker with access to guest operating system can 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-2018-8489
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8490