SB2018061231 - Multiple vulnerabilities in Microsoft Hyper-V

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Improper input validation (CVE-ID: CVE-2018-8218)

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.

2) Privilege escalation (CVE-ID: CVE-2018-8219)

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 update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8218
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8219