Multiple vulnerabilities in Microsoft Hyper-V

Published: 2018-06-12 22:27:16
Severity Low
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2018-8218
CVE-2018-8219
CVSSv3 5.9 [CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
5.9 [CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CWE ID CWE-20
CWE-264
Exploitation vector Local network
Public exploit N/A
Vulnerable software Windows
Windows Server
Vulnerable software versions Windows 10
Windows Server 2016
Vendor URL Microsoft

Security Advisory

1) Improper input validation

Description

The vulnerability allows an adjacent low-privileged attacker to cause DoS condition on the target system.

The vulnerability exists due to an error when virtual machines access the Hyper-V Network Switch. An adjacent attacker can run a specially crafted application that causes a host machine to crash.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8218

2) Privilege escalation

Description

The vulnerability allows an adjacent attacker to gain elevated privileges on the target system.

The vulnerability exists due to an error when Windows Hyper-V instruction emulation fails to properly enforce privilege levels. An adjacent attacker can gain elevated privileges on a target guest operating system.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8219

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