Privilege escalation in Microsoft Windows Hyper-V

Published: 2018-10-09

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2018-8489 CVE-2018-8490
CWE-ID	CWE-20
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation

EUVDB-ID: #VU15252

Risk: Medium

CVSSv3.1: 6.6 [CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8489

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 7 - 10 1809 10.0.17763.1

Windows Server: 2008 - 2019 1803

CPE2.3

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8489

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Improper input validation

EUVDB-ID: #VU15253