CVE-2021-41379: Microsoft Windows Installer Privilege Escalation Vulnerability

Published Nov 9, 2021
·
Updated

Microsoft Windows Installer contains an unspecified vulnerability that allows for privilege escalation.

Other sources

Windows Installer Elevation of Privilege Vulnerability

Microsoft

Affected Software

79 affected componentsFixes available
Microsoft Windows 10=20H2
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 11
Microsoft Windows 11
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<10.0.10240.19119
Microsoft Windows 10 1607<10.0.14393.4770
Microsoft Windows 10 1809<10.0.17763.2300
Microsoft Windows 10 1909<10.0.18363.1916
Microsoft Windows 10 2004<10.0.19041.1348
Microsoft Windows 10 20h2<10.0.19042.1348
Microsoft Windows 10 21h1<10.0.19043.1348
Microsoft Windows 11 21h2<10.0.22000.318
Microsoft Windows Server 2004<10.0.19041.1348
Microsoft Windows Server 2016<10.0.14393.4770
Microsoft Windows Server 2019<10.0.17763.2300
Microsoft Windows Server 2022<10.0.20348.350
Microsoft Windows Server 20h2<10.0.19042.1348
Microsoft Windows Server 2012 R2<6.3.9600.20174
6.3.9600.20174
Microsoft Windows Server 2012<6.2.9200.23517
6.2.9200.23517
Microsoft Windows Server 2012<6.2.9200.23517
6.2.9200.23517
Microsoft Windows Server 2012 R2<6.3.9600.20174
6.3.9600.20174
Microsoft Windows Server 2008<6.0.6003.21282
6.0.6003.21282
Microsoft Windows Server 2008 R2<6.1.7601.25769
6.1.7601.25769
Microsoft Windows Server 2008 R2<6.1.7601.25769
6.1.7601.25769
Microsoft Windows Server 2008<6.0.6003.21282
6.0.6003.21282
Microsoft Windows Server 2008<6.0.6003.21282
6.0.6003.21282
Microsoft Windows RT 8.1<6.3.9600.20174
6.3.9600.20174
Microsoft Windows Server 2008<6.0.6003.21282
6.0.6003.21282
Microsoft Windows 7<6.1.7601.25769
6.1.7601.25769
Microsoft Windows 8.1 for 32-bit systems<6.3.9600.20174
6.3.9600.20174
Microsoft Windows 8.1 for x64-based systems<6.3.9600.20174
6.3.9600.20174
Microsoft Windows 7<6.1.7601.25769
6.1.7601.25769
Microsoft Windows 10=1607
10.0.14393.4770
Microsoft Windows Server 2016<10.0.14393.4770
10.0.14393.4770
Microsoft Windows 10=1607
10.0.14393.4770
Microsoft Windows Server 2016<10.0.14393.4770
10.0.14393.4770
Microsoft Windows 10<10.0.10240.19119
10.0.10240.19119
Microsoft Windows 10=20H2
10.0.19042.1348
Microsoft Windows 10<10.0.10240.19119
10.0.10240.19119
Microsoft Windows Server=2004
10.0.19041.1348
Microsoft Windows Server=20H2
10.0.19042.1348
Microsoft Windows 10=2004
10.0.19041.1348
Microsoft Windows 11=21H2
10.0.22000.318
Microsoft Windows 11=21H2
10.0.22000.318
Microsoft Windows 10=2004
10.0.19041.1348
Microsoft Windows 10=20H2
10.0.19042.1348
Microsoft Windows Server 2022<10.0.20348.350
10.0.20348.350
Microsoft Windows 10=2004
10.0.19041.1348
Microsoft Windows 10=21H1
10.0.19043.1348
Microsoft Windows 10=21H1
10.0.19043.1348
Microsoft Windows 10=1909
10.0.18363.1916
Microsoft Windows Server 2022<10.0.20348.350
10.0.20348.350
Microsoft Windows 10=1909
10.0.18363.1916
Microsoft Windows 10=21H1
10.0.19043.1348
Microsoft Windows Server 2019<10.0.17763.2300
10.0.17763.2300
Microsoft Windows 10=1909
10.0.18363.1916
Microsoft Windows Server 2019<10.0.17763.2300
10.0.17763.2300
Microsoft Windows 10=1809
10.0.17763.2300
Microsoft Windows 10=1809
10.0.17763.2300
Microsoft Windows 10=1809
10.0.17763.2300

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 6.2.9200.23517Patch KB5007245
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 6.3.9600.20174Patch KB5007255
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 6.0.6003.21282Patch KB5007246
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 6.1.7601.25769Patch KB5007233
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 6.3.9600.20174Patch KB5007247
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.14393.4770Patch KB5007192
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.10240.19119Patch KB5007207
  8. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.19041.1348Patch KB5007186
  9. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.19042.1348Patch KB5007186
  10. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.22000.318Patch KB5007215
  11. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.20348.350Patch KB5007205
  12. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.19043.1348Patch KB5007186
  13. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.18363.1916Patch KB5007189
  14. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 10.0.17763.2300Patch KB5007206

Event History

Nov 9, 2021
CVE Published
via Microsoft·08:00 AM
Data Sourced
via Microsoft·08:00 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·08:00 AM
Affected Software
Updated
via Microsoft·08:00 AM
Description
Nov 10, 2021
CVE Published
via MITRE·12:46 AM
Data Sourced
via MITRE·12:46 AM
DescriptionSeverity
Data Sourced
via NVD·01:19 AM
RemedyDescriptionSeverityWeaknessAffected Software
Nov 11, 2021
Advisory Published
via ZDI·12:00 AM
Data Sourced
via ZDI·12:00 AM
DescriptionSeverityAffected Software
Mar 3, 2022
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-2021-41379?

CVE-2021-41379 has been classified as a high severity vulnerability that allows for privilege escalation in Microsoft Windows Installer.

2

How do I fix CVE-2021-41379?

To mitigate CVE-2021-41379, apply the relevant security patches provided by Microsoft for your version of Windows.

3

Which versions of Windows are affected by CVE-2021-41379?

CVE-2021-41379 affects multiple versions of Microsoft Windows including Windows 10, Windows 11, and various Windows Server versions.

4

Is there a workaround for CVE-2021-41379?

Currently, Microsoft recommends applying the security updates as the primary means of protection against CVE-2021-41379.

5

How does CVE-2021-41379 impact system security?

CVE-2021-41379 potentially allows attackers to elevate their privileges, which may lead to unauthorized access and control over the system.

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