CVE-2021-31170: Microsoft Windows win32kfull Palette Use-After-Free Privilege Escalation Vulnerability
First published: Tue May 11 2021(Updated: )
This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of Palette objects. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.
Credit: secure@microsoft.com secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Microsoft Windows 10 | =20h2 | |
| Microsoft Windows 10 | =1803 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows Server 2016 | =20h2 | |
| Microsoft Windows Server 2016 | =1909 | |
| Microsoft Windows Server 2016 | =2004 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server | =2004 | |
| Microsoft Windows Server | =1909 | |
| Microsoft Windows Server | =20H2 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2019 | ||
| Microsoft Windows | ||
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows 10 | =2004 | |
| Microsoft Windows 10 | =1803 | |
| Microsoft Windows 10 | =1803 | |
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =1909 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =1809 | |
| Microsoft Windows 10 | =20H2 | |
| Microsoft Windows 10 | =1803 | |
| Microsoft Windows 10 | =20H2 | |
| Microsoft Windows 10 | =20H2 |
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Reference Links
- collector/msrc-cve
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- agent/softwarecombine
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- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-21-578
- alias/ZDI-CAN-13321
- alias/CVE-2021-31170
- agent/software-canonical-lookup
- agent/event
- source/Microsoft
- agent/tags
- agent/trending
- vendor/microsoft
- canonical/microsoft windows 10
- version/microsoft windows 10/20h2
- version/microsoft windows 10/1803
- version/microsoft windows 10/1809
- version/microsoft windows 10/1909
- version/microsoft windows 10/2004
- canonical/microsoft windows server 2016
- version/microsoft windows server 2016/20h2
- version/microsoft windows server 2016/1909
- version/microsoft windows server 2016/2004
- canonical/microsoft windows server 2019
- canonical/microsoft windows
- canonical/microsoft windows server
- version/microsoft windows server/1909
- version/microsoft windows server/2004
- version/microsoft windows server/20h2