CVE-2021-36955: Windows Common Log File System Driver Elevation of Privilege Vulnerability

Published Sep 14, 2021
·
Updated

Microsoft Windows Common Log File System (CLFS) driver contains an unspecified vulnerability that allows for privilege escalation.

Other sources

Windows Common Log File System Driver Elevation of Privilege Vulnerability

— NVD

Affected Software

73 affected componentsFixes available
Microsoft Windows 10
Microsoft Windows 10=20h2
Microsoft Windows 10=21h1
Microsoft Windows 10=1607
Microsoft Windows 10=1809
Microsoft Windows 10=1909
Microsoft Windows 10=2004
Microsoft Windows 7=sp1
Microsoft Windows 8.1
Microsoft Windows RT 8.1
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
Microsoft Windows Server 2016=20h2
Microsoft Windows Server 2016=2004
Microsoft Windows Server 2019
Microsoft Windows Server 2022
Microsoft Windows
Microsoft Windows 10 1507<10.0.10240.19060
Microsoft Windows 10 1607<10.0.14393.4651
Microsoft Windows 10 1809<10.0.17763.2183
Microsoft Windows 10 1909<10.0.18363.1801
Microsoft Windows 10 2004<10.0.19041.1237
Microsoft Windows 10 20h2<10.0.19042.1237
Microsoft Windows 10 21h1<10.0.19043.1237
Microsoft Windows Server 2004<10.0.19041.1237
Microsoft Windows Server 2016<10.0.14393.4651
Microsoft Windows Server 2019<10.0.17763.2183
Microsoft Windows Server 2022<10.0.20348.230
Microsoft Windows Server 20h2<10.0.19042.1237
Microsoft Windows Server 2012<6.2.9200.23462
6.2.9200.23462
Microsoft Windows Server 2012 R2<6.3.9600.20120
6.3.9600.20120
Microsoft Windows Server 2012<6.2.9200.23462
6.2.9200.23462
Microsoft Windows Server 2012 R2<6.3.9600.20120
6.3.9600.20120
Microsoft Windows Server 2008 R2<6.1.7601.25712
6.1.7601.25712
Microsoft Windows Server 2008<6.0.6003.21218
6.0.6003.21218
Microsoft Windows Server 2008<6.0.6003.21218
6.0.6003.21218
Microsoft Windows Server 2008<6.0.6003.21218
6.0.6003.21218
Microsoft Windows 7<6.1.7601.25712
6.1.7601.25712
Microsoft Windows 7<6.1.7601.25712
6.1.7601.25712
Microsoft Windows 8.1 for 32-bit systems<6.3.9600.20120
6.3.9600.20120
Microsoft Windows 8.1 for x64-based systems<6.3.9600.20120
6.3.9600.20120
Microsoft Windows Server 2008<6.0.6003.21218
6.0.6003.21218
Microsoft Windows Server 2016<10.0.14393.4651
10.0.14393.4651
Microsoft Windows RT 8.1<6.3.9600.20120
6.3.9600.20120
Microsoft Windows Server 2008 R2<6.1.7601.25712
6.1.7601.25712
Microsoft Windows 10<10.0.10240.19060
10.0.10240.19060
Microsoft Windows 10=1607
10.0.14393.4651
Microsoft Windows Server=20H2
10.0.19042.1237
Microsoft Windows 10<10.0.10240.19060
10.0.10240.19060
Microsoft Windows 10=1607
10.0.14393.4651
Microsoft Windows 10=20H2
10.0.19042.1237
Microsoft Windows 10=20H2
10.0.19042.1237
Microsoft Windows Server=2004
10.0.19041.1237
Microsoft Windows 10=2004
10.0.19041.1237
Microsoft Windows 10=2004
10.0.19041.1237
Microsoft Windows 10=2004
10.0.19041.1237
Microsoft Windows Server 2022<10.0.20348.230
10.0.20348.230
Microsoft Windows Server 2022<10.0.20348.230
10.0.20348.230
Microsoft Windows 10=1909
10.0.18363.1801
Microsoft Windows 10=21H1
10.0.19043.1237
Microsoft Windows 10=21H1
10.0.19043.1237
Microsoft Windows 10=21H1
10.0.19043.1237
Microsoft Windows 10=1909
10.0.18363.1801
Microsoft Windows Server 2019<10.0.17763.2183
10.0.17763.2183
Microsoft Windows 10=1909
10.0.18363.1801
Microsoft Windows 10=1809
10.0.17763.2183
Microsoft Windows 10=1809
10.0.17763.2183
Microsoft Windows Server 2016<10.0.14393.4651
10.0.14393.4651
Microsoft Windows 10=1809
10.0.17763.2183
Microsoft Windows Server 2019<10.0.17763.2183
10.0.17763.2183

Remediation

Patch Available

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-36955

Patch Available

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-36955

Event History

Sep 14, 2021
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
Sep 15, 2021
CVE Published
via MITRE·11:23 AM
Data Sourced
via MITRE·11:23 AM
DescriptionSeverity
Data Sourced
via NVD·12:15 PM
RemedyDescriptionSeverityAffected Software
Nov 3, 2021
Known Exploited
via CISA·12:00 AM
Known Ransomware
via CISA·12:00 AM
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Frequently Asked Questions

1

What is the severity of CVE-2021-36955?

The severity of CVE-2021-36955 is considered high, indicating a significant risk of privilege escalation.

2

How do I fix CVE-2021-36955?

To fix CVE-2021-36955, ensure that your Microsoft Windows systems are updated with the latest security patches provided by Microsoft.

3

What systems are affected by CVE-2021-36955?

CVE-2021-36955 affects various versions of Microsoft Windows, including Windows 7, Windows 8.1, and multiple editions of Windows 10 and Windows Server.

4

Is there a workaround for CVE-2021-36955?

There are no known workarounds for CVE-2021-36955; applying the security update is the recommended solution.

5

Can CVE-2021-36955 be exploited remotely?

CVE-2021-36955 does not require remote access to exploit, but an authenticated user may escalate their privileges if vulnerable.

Company

Resources

Contact

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