CVE-2018-0888 — Windows Hyper-V Information Disclosure Vulnerability

Executive Summary

An information disclosure vulnerability exists when Windows Hyper-V on a host operating system fails to properly validate input from an authenticated user on a guest operating system. To exploit the vulnerability, an attacker on a guest operating system could run a specially crafted application that could cause the Hyper-V host operating system to disclose memory information. An attacker who successfully exploited the vulnerability could gain access to information on the Hyper-V host operating system. The security update addresses the vulnerability by correcting how Hyper-V validates guest operating system user input.

Overview

7.2

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Information Disclosure

Released Mar 13 2018

Last Updated Mar 13 2018

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

CVSS Vector

ATTACK VECTOR

Local

ATTACK COMPLEXITY

High

PRIVILEGES REQUIRED

High

USER INTERACTION

None

SCOPE

Changed

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

None

EXPLOIT CODE MATURITY

Proof-of-Concept

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.5

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

10 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 for x64-based Systems	`4088786 (Security Update)`	Important	Information Disclosure	Yes
Windows 10 Version 1511 for x64-based Systems	`4088779 (Security Update)`	Important	Information Disclosure	Yes
Windows 10 Version 1607 for x64-based Systems	`4088787 (Security Update)`	Important	Information Disclosure	Yes
Windows 10 Version 1703 for x64-based Systems	`4088782 (Security Update)`	Important	Information Disclosure	Yes
Windows 10 Version 1709 for x64-based Systems	`4088776 (Security Update)`	Important	Information Disclosure	Yes
Windows 7 for x64-based Systems Service Pack 1 4088875 (Monthly Rollup) 4088878 (Security Only) Important Information Disclosure 4074598 Base: 7.2 Temporal: 6.5 Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows 8.1 for x64-based systems 4088876 (Monthly Rollup) 4088879 (Security Only) Important Information Disclosure 4074594 Base: 7.2 Temporal: 6.5 Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 for x64-based Systems Service Pack 2	`4088827 (Security Update)`	Important	Information Disclosure	Yes
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)	`4088827 (Security Update)`	Important	Information Disclosure	Yes
Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 4088875 (Monthly Rollup) 4088878 (Security Only) Important Information Disclosure 4074598 Base: 7.2 Temporal: 6.5 Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 4088875 (Monthly Rollup) 4088878 (Security Only) Important Information Disclosure 4074598 Base: 7.2 Temporal: 6.5 Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4088875 (Monthly Rollup) 4088878 (Security Only) Important Information Disclosure 4074598 Base: 7.2 Temporal: 6.5 Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 4088877 (Monthly Rollup) 4088880 (Security Only) Important Information Disclosure 4074593 Base: 7.2 Temporal: 6.5 Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 (Server Core installation) 4088877 (Monthly Rollup) 4088880 (Security Only) Important Information Disclosure 4074593 Base: 7.2 Temporal: 6.5 Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 4088876 (Monthly Rollup) 4088879 (Security Only) Important Information Disclosure 4074594 Base: 7.2 Temporal: 6.5 Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 (Server Core installation) 4088876 (Monthly Rollup) 4088879 (Security Only) Important Information Disclosure 4074594 Base: 7.2 Temporal: 6.5 Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N/E:P/RL:O/RC:C Yes None Windows Server 2016	`4088787 (Security Update)`	Important	Information Disclosure	Yes
Windows Server 2016 (Server Core installation)	`4088787 (Security Update)`	Important	Information Disclosure	Yes
Windows Server, version 1709 (Server Core Installation)	`4088776 (Security Update)`	Important	Information Disclosure	Yes

Patches

6 patches

Article	Type	Restart
`4088786`	Security Update	Yes
`4088779`	Security Update	Yes
`4088787`	Security Update	Yes
`4088782`	Security Update	Yes
`4088776`	Security Update	Yes
`4088827`	Security Update	Yes

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Joe Bialek, MSRC Vulnerabilities and Mitigations Team

References

MSRC Advisory MITRE NVD