CVE-2021-31954

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Description

Windows Common Log File System Driver Elevation of Privilege Vulnerability

Categories

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.50% Top 20%
Vendor Advisory microsoft.com
Affected: Microsoft Windows 10 Version 1809
Affected: Microsoft Windows Server 2019
Affected: Microsoft Windows Server 2019 (Server Core installation)
Affected: Microsoft Windows 10 Version 1909
Affected: Microsoft Windows 10 Version 21H1
Affected: Microsoft Windows 10 Version 2004
Affected: Microsoft Windows Server version 2004
Affected: Microsoft Windows 10 Version 20H2
Affected: Microsoft Windows Server version 20H2
Affected: Microsoft Windows 10 Version 1507
Affected: Microsoft Windows 10 Version 1607
Affected: Microsoft Windows Server 2016
Affected: Microsoft Windows Server 2016 (Server Core installation)
Affected: Microsoft Windows 7
Affected: Microsoft Windows 7 Service Pack 1
Affected: Microsoft Windows 8.1
Affected: Microsoft Windows Server 2008 Service Pack 2
Affected: Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
Affected: Microsoft Windows Server 2008 Service Pack 2
Affected: Microsoft Windows Server 2008 R2 Service Pack 1
Affected: Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
Affected: Microsoft Windows Server 2012
Affected: Microsoft Windows Server 2012 (Server Core installation)
Affected: Microsoft Windows Server 2012 R2
Affected: Microsoft Windows Server 2012 R2 (Server Core installation)
Published at:
Updated at:

References

Link Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31954 patch vendor advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-668/ vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-31954?
CVE-2021-31954 has been scored as a high severity vulnerability.
How to fix CVE-2021-31954?
To fix CVE-2021-31954, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-31954 being actively exploited in the wild?
It is possible that CVE-2021-31954 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-31954?
CVE-2021-31954 affects Microsoft Windows 10 Version 1809, Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows 10 Version 1909, Microsoft Windows 10 Version 21H1, Microsoft Windows 10 Version 2004, Microsoft Windows Server version 2004, Microsoft Windows 10 Version 20H2, Microsoft Windows Server version 20H2, Microsoft Windows 10 Version 1507, Microsoft Windows 10 Version 1607, Microsoft Windows Server 2016, Microsoft Windows Server 2016 (Server Core installation), Microsoft Windows 7, Microsoft Windows 7 Service Pack 1, Microsoft Windows 8.1, Microsoft Windows Server 2008 Service Pack 2, Microsoft Windows Server 2008 Service Pack 2 (Server Core installation), Microsoft Windows Server 2008 Service Pack 2, Microsoft Windows Server 2008 R2 Service Pack 1, Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation), Microsoft Windows Server 2012, Microsoft Windows Server 2012 (Server Core installation), Microsoft Windows Server 2012 R2, Microsoft Windows Server 2012 R2 (Server Core installation).
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