Windows Kernel-Mode Drivers
CVE-2018-8641 — Win32k Elevation of Privilege Vulnerability
Executive Summary
An elevation of privilege vulnerability exists in Windows when the Windows kernel-mode driver 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 the Windows kernel-mode driver handles objects in memory.
Overview
7
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
More Likely
MS Exploit Likelihood
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.orgAffected Products
22 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 for 32-bit Systems | 4471323 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 for x64-based Systems | 4471323 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1607 for 32-bit Systems | 4471321 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1607 for x64-based Systems | 4471321 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1703 for 32-bit Systems | 4471327 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1703 for x64-based Systems | 4471327 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1709 for 32-bit Systems | 4471329 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1709 for ARM64-based Systems | 4471329 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1709 for x64-based Systems | 4471329 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1803 for 32-bit Systems | 4471324 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1803 for ARM64-based Systems | 4471324 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1803 for x64-based Systems | 4471324 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1809 for 32-bit Systems | 4471332 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1809 for ARM64-based Systems | 4471332 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 10 Version 1809 for x64-based Systems | 4471332 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows 7 for 32-bit Systems Service Pack 1 4471318 (Monthly Rollup) 4471328 (Security Only) Important Elevation of Privilege 4467107 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 4471318 (Monthly Rollup) 4471328 (Security Only) Important Elevation of Privilege 4467107 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 4471320 (Monthly Rollup) 4471322 (Security Only) Important Elevation of Privilege 4467697 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 4471320 (Monthly Rollup) 4471322 (Security Only) Important Elevation of Privilege 4467697 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 | 4471320 (Monthly Rollup) |
Important | Elevation of Privilege | Yes |
| Windows Server 2008 for 32-bit Systems Service Pack 2 4471325 (Monthly Rollup) 4471319 (Security Only) Important Elevation of Privilege 4467706 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 for 32-bit Systems Service Pack 2 (Server Core installation) 4471325 (Monthly Rollup) 4471319 (Security Only) Important Elevation of Privilege 4467706 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 for Itanium-Based Systems Service Pack 2 4471325 (Monthly Rollup) 4471319 (Security Only) Important Elevation of Privilege 4467706 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 for x64-based Systems Service Pack 2 4471325 (Monthly Rollup) 4471319 (Security Only) Important Elevation of Privilege 4467706 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 for x64-based Systems Service Pack 2 (Server Core installation) 4471325 (Monthly Rollup) 4471319 (Security Only) Important Elevation of Privilege 4467706 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 4471318 (Monthly Rollup) 4471328 (Security Only) Important Elevation of Privilege 4467107 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 4471318 (Monthly Rollup) 4471328 (Security Only) Important Elevation of Privilege 4467107 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) 4471318 (Monthly Rollup) 4471328 (Security Only) Important Elevation of Privilege 4467107 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 4471330 (Monthly Rollup) 4471326 (Security Only) Important Elevation of Privilege 4467701 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) 4471330 (Monthly Rollup) 4471326 (Security Only) Important Elevation of Privilege 4467701 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 4471320 (Monthly Rollup) 4471322 (Security Only) Important Elevation of Privilege 4467697 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) 4471320 (Monthly Rollup) 4471322 (Security Only) Important Elevation of Privilege 4467697 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 | 4471321 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2016 (Server Core installation) | 4471321 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2019 | 4471332 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server 2019 (Server Core installation) | 4471332 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server, version 1709 (Server Core Installation) | 4471329 (Security Update) |
Important | Elevation of Privilege | Yes |
| Windows Server, version 1803 (Server Core Installation) | 4471324 (Security Update) |
Important | Elevation of Privilege | Yes |
Patches
7 patches
| Article | Type | Restart |
|---|---|---|
4471323 |
Security Update | Yes |
4471321 |
Security Update | Yes |
4471327 |
Security Update | Yes |
4471329 |
Security Update | Yes |
4471324 |
Security Update | Yes |
4471332 |
Security Update | Yes |
4471320 |
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
Microsoft has not published researcher acknowledgments for this CVE, or they are not yet reflected in our data source. Check the MSRC advisory directly for the most current credit information.
References
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