SB2018031321 - Multiple vulnerabilities in Microsoft Hyper-V

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper input validation (CVE-ID: CVE-2018-0885)

CWE-ID: CWE-20 - Improper input validation

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

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

The weakness exists in Microsoft Hyper-V Network Switch on a host server due to insufficient input validation. An adjacent attacker can run a specially crafted application and cause a host machine to crash.

2) Information disclosure (CVE-ID: CVE-2018-0888)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

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

The vulnerability allows an adjacent attacker to obtain potentially sensitive information on the target system.

The weakness exists in Microsoft Hyper-V Network on a host operating system due to insufficient input validation. An adjacent attacker can run a specially crafted application and gain access to arbitrary data.

Remediation

Install update from vendor's website.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0885
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0888