OnlyPatch
Windows Kernel

CVE-2018-8404 — Win32k Elevation of Privilege Vulnerability

Important CVSS 7 2018-08 archive

Executive Summary

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The update addresses this vulnerability by correcting how Win32k handles objects in memory.

Overview

7
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Aug 14 2018
Last Updated Aug 14 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 4343892 (Security Update) Important Elevation of Privilege Yes
Windows 10 for x64-based Systems 4343892 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for 32-bit Systems 4343887 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1607 for x64-based Systems 4343887 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1703 for 32-bit Systems 4343885 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1703 for x64-based Systems 4343885 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for 32-bit Systems 4343897 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1709 for x64-based Systems 4343897 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for 32-bit Systems 4343909 (Security Update) Important Elevation of Privilege Yes
Windows 10 Version 1803 for x64-based Systems 4343909 (Security Update) Important Elevation of Privilege Yes
Windows 7 for 32-bit Systems Service Pack 1 4343900 (Monthly Rollup) 4343899 (Security Only) Important Elevation of Privilege 4338818 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 7 for x64-based Systems Service Pack 1 4343900 (Monthly Rollup) 4343899 (Security Only) Important Elevation of Privilege 4338818 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 32-bit systems 4343898 (Monthly Rollup) 4343888 (Security Only) Important Elevation of Privilege 4338815 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 4343898 (Monthly Rollup) 4343888 (Security Only) Important Elevation of Privilege 4338815 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 2008 R2 for Itanium-Based Systems Service Pack 1 4343900 (Monthly Rollup) 4343899 (Security Only) Important Elevation of Privilege 4338818 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 2008 R2 for x64-based Systems Service Pack 1 4343900 (Monthly Rollup) 4343899 (Security Only) Important Elevation of Privilege 4338818 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 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) 4343900 (Monthly Rollup) 4343899 (Security Only) Important Elevation of Privilege 4338818 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 4343901 (Monthly Rollup) 4343896 (Security Only) Important Elevation of Privilege 4338830 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) 4343901 (Monthly Rollup) 4343896 (Security Only) Important Elevation of Privilege 4338830 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 4343898 (Monthly Rollup) 4343888 (Security Only) Important Elevation of Privilege 4338815 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) 4343898 (Monthly Rollup) 4343888 (Security Only) Important Elevation of Privilege 4338815 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 4343887 (Security Update) Important Elevation of Privilege Yes
Windows Server 2016 (Server Core installation) 4343887 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 1709 (Server Core Installation) 4343897 (Security Update) Important Elevation of Privilege Yes
Windows Server, version 1803 (Server Core Installation) 4343909 (Security Update) Important Elevation of Privilege Yes

Patches

5 patches
Article Type Restart
4343892 Security Update Yes
4343887 Security Update Yes
4343885 Security Update Yes
4343897 Security Update Yes
4343909 Security Update Yes

Known Exploits

Acknowledgments

RanchoIce of Tencent ZhanluLab working with Trend Micro's Zero Day Initiative

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