Windows Kernel
CVE-2018-8637 — Win32k Information Disclosure Vulnerability
Executive Summary
An information disclosure vulnerability exists in Windows kernel that could allow an attacker to retrieve information that could lead to a Kernel Address Space Layout Randomization (KASLR) bypass. An attacker who successfully exploited this vulnerability could retrieve the memory address of a kernel object. To exploit this vulnerability, an attacker would have to log on to an affected system and run a specially crafted application. The security update addresses the vulnerability by correcting how the Windows kernel handles memory addresses.
Overview
4.7
CVSS MEDIUM
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
None
AVAILABILITY
None
EXPLOIT CODE MATURITY
Proof-of-Concept
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 4.2
EPSS Score
No EPSS score available for this CVE.
View on FIRST.orgAffected Products
9 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 Version 1803 for 32-bit Systems | 4471324 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1803 for ARM64-based Systems | 4471324 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1803 for x64-based Systems | 4471324 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for 32-bit Systems | 4471332 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for ARM64-based Systems | 4471332 (Security Update) |
Important | Information Disclosure | Yes |
| Windows 10 Version 1809 for x64-based Systems | 4471332 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server 2019 | 4471332 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server 2019 (Server Core installation) | 4471332 (Security Update) |
Important | Information Disclosure | Yes |
| Windows Server, version 1803 (Server Core Installation) | 4471324 (Security Update) |
Important | Information Disclosure | Yes |
Patches
2 patches
| Article | Type | Restart |
|---|---|---|
4471324 |
Security Update | Yes |
4471332 |
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
Alex Ionescu, CrowdStrike Inc.
References
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