CVE-2018-8639: Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability
First published: Wed Dec 12 2018(Updated: )
An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 7, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2008, Windows Server 2019, Windows Server 2012, Windows 8.1, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers. This CVE ID is unique from CVE-2018-8641.
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | =1607 | |
| Microsoft Windows 10 | =1703 | |
| Microsoft Windows 10 | =1709 | |
| Microsoft Windows 10 | =1803 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 7 | =sp1 | |
| Microsoft Windows 8.1 | ||
| Microsoft Windows RT | ||
| Microsoft Windows Server | =sp2 | |
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2016 | =1709 | |
| Microsoft Windows Server 2016 | =1803 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 | ||
| Microsoft Windows 10 |
Remedy
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Reference Links
- http://www.securityfocus.com/bid/106093
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8639
- https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2018-8639
- https://nvd.nist.gov/vuln/detail/CVE-2018-8639
- https://www.bleepingcomputer.com/news/security/cisa-tags-windows-and-cisco-vulnerabilities-as-actively-exploited/
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2018-8639?
CVE-2018-8639 has a severity rating of important according to Microsoft's classification.
How do I fix CVE-2018-8639?
To mitigate CVE-2018-8639, apply the latest security updates provided by Microsoft.
Which Windows versions are affected by CVE-2018-8639?
CVE-2018-8639 affects multiple versions including Windows 7, Windows 10, Windows Server 2008, and Windows Server 2019.
What type of vulnerability is CVE-2018-8639?
CVE-2018-8639 is classified as an elevation of privilege vulnerability.
Can CVE-2018-8639 be exploited remotely?
CVE-2018-8639 requires local access to the system to be exploited, making remote exploitation unlikely.
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