CVE-2018-1009 — Microsoft DirectX Graphics Kernel Subsystem Elevation of Privilege Vulnerability

Executive Summary

An elevation of privilege vulnerability exists when Windows improperly handles objects in memory and incorrectly maps kernel memory. In a local attack scenario, an attacker could exploit this vulnerability by running a specially crafted application to take control over the affected system. An attacker who successfully exploited this vulnerability could run processes in an elevated context. The update addresses the vulnerability by correcting the way the Microsoft DirectX graphics kernel subsystem (dxgkrnl.sys) handles certain calls and escapes, to preclude improper memory mapping and to prevent unintended elevation from user mode.

Overview

7

CVSS HIGH

Important

MS Severity

Not Exploited

MS Exploit Status

Less Likely

MS Exploit Likelihood

Category Elevation of Privilege

Released Apr 10 2018

Last Updated Apr 10 2018

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

CVSS Vector

ATTACK VECTOR

Local

ATTACK COMPLEXITY

High

PRIVILEGES REQUIRED

Low

USER INTERACTION

None

SCOPE

Unchanged

CONFIDENTIALITY

High

INTEGRITY

High

AVAILABILITY

High

EXPLOIT CODE MATURITY

Proof-of-Concept

REMEDIATION LEVEL

Official Fix

REPORT CONFIDENCE

Confirmed

Temporal Score: 6.3

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

14 affected products

Product	KB Article	Severity	Impact	Restart Required
Windows 10 for 32-bit Systems	`4093111 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 for x64-based Systems	`4093111 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1511 for 32-bit Systems	`4093109 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1511 for x64-based Systems	`4093109 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1607 for 32-bit Systems	`4093119 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1607 for x64-based Systems	`4093119 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1703 for 32-bit Systems	`4093107 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1703 for x64-based Systems	`4093107 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1709 for 32-bit Systems	`4093112 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 10 Version 1709 for x64-based Systems	`4093112 (Security Update)`	Important	Elevation of Privilege	Yes
Windows 8.1 for 32-bit systems 4093114 (Monthly Rollup) 4093115 (Security Only) Important Elevation of Privilege 4088876 Base: 7.0 Temporal: 6.3 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows 8.1 for x64-based systems 4093114 (Monthly Rollup) 4093115 (Security Only) Important Elevation of Privilege 4088876 Base: 7.0 Temporal: 6.3 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows RT 8.1	`4093114 (Monthly Rollup)`	Important	Elevation of Privilege	Yes
Windows Server 2012 4093123 (Monthly Rollup) 4093122 (Security Only) Important Elevation of Privilege 4088877 Base: 7.0 Temporal: 6.3 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 (Server Core installation) 4093123 (Monthly Rollup) 4093122 (Security Only) Important Elevation of Privilege 4088877 Base: 7.0 Temporal: 6.3 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 4093114 (Monthly Rollup) 4093115 (Security Only) Important Elevation of Privilege 4088876 Base: 7.0 Temporal: 6.3 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2012 R2 (Server Core installation) 4093114 (Monthly Rollup) 4093115 (Security Only) Important Elevation of Privilege 4088876 Base: 7.0 Temporal: 6.3 Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C Yes None Windows Server 2016	`4093119 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server 2016 (Server Core installation)	`4093119 (Security Update)`	Important	Elevation of Privilege	Yes
Windows Server, version 1709 (Server Core Installation)	`4093112 (Security Update)`	Important	Elevation of Privilege	Yes

Patches

6 patches

Article	Type	Restart
`4093111`	Security Update	Yes
`4093109`	Security Update	Yes
`4093119`	Security Update	Yes
`4093107`	Security Update	Yes
`4093112`	Security Update	Yes
`4093114`	Monthly Rollup	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

Roi Mallo of Reverse Engineering R&D

References

MSRC Advisory MITRE NVD