Jan 2023: Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
CVE-2023-21674 Published on January 10, 2023

Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability
Windows Advanced Local Procedure Call (ALPC) Elevation of Privilege Vulnerability

Vendor Advisory NVD

Known Exploited Vulnerability

This Microsoft Windows Advanced Local Procedure Call (ALPC) Privilege Escalation Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Microsoft Windows Advanced Local Procedure Call (ALPC) contains an unspecified vulnerability that allows for privilege escalation.

The following remediation steps are recommended / required by January 31, 2023: Apply updates per vendor instructions.

Weakness Type

What is a Dangling pointer Vulnerability?

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

CVE-2023-21674 has been classified to as a Dangling pointer vulnerability or weakness.

Products Associated with CVE-2023-21674

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Microsoft Windows Server 2012

Microsoft Windows Server 2016

Microsoft Windows Server 2019

Microsoft Windows Server 2022

Microsoft Windows 10

Microsoft Windows 11

Microsoft Windows Rt 8 1

Microsoft Windows 10 1507

Microsoft Windows 8.1

Microsoft Windows Server 2012 R2

Affected Versions

Microsoft Windows 10 Version 1809:

Version 10.0.17763.0 and below 10.0.17763.3887 is affected.

Microsoft Windows 10 Version 1809:

Version 10.0.0 and below 10.0.17763.3887 is affected.

Microsoft Windows Server 2019:

Version 10.0.17763.0 and below 10.0.17763.3887 is affected.

Microsoft Windows Server 2019 (Server Core installation):

Version 10.0.17763.0 and below 10.0.17763.3887 is affected.

Microsoft Windows Server 2022:

Version 10.0.20348.0 and below 10.0.20348.1487 is affected.

Microsoft Windows 10 Version 20H2:

Version 10.0.0 and below 10.0.19042.2486 is affected.

Microsoft Windows 11 version 21H2:

Version 10.0.0 and below 10.0.22000.1455 is affected.

Microsoft Windows 10 Version 21H2:

Version 10.0.19043.0 and below 10.0.19044.2486 is affected.

Microsoft Windows 11 version 22H2:

Version 10.0.22621.0 and below 10.0.22621.1105 is affected.

Microsoft Windows 10 Version 22H2:

Version 10.0.19045.0 and below 10.0.19045.2486 is affected.

Microsoft Windows 10 Version 1507:

Version 10.0.10240.0 and below 10.0.10240.19685 is affected.

Microsoft Windows 10 Version 1607:

Version 10.0.14393.0 and below 10.0.14393.5648 is affected.

Microsoft Windows Server 2016:

Version 10.0.14393.0 and below 10.0.14393.5648 is affected.

Microsoft Windows Server 2016 (Server Core installation):

Version 10.0.14393.0 and below 10.0.14393.5648 is affected.

Microsoft Windows 8.1:

Version 6.3.0 and below 6.3.9600.20778 is affected.

Microsoft Windows Server 2012 R2:

Version 6.3.9600.0 and below 6.3.9600.20778 is affected.

Microsoft Windows Server 2012 R2 (Server Core installation):

Version 6.3.9600.0 and below 6.3.9600.20778 is affected.

Exploit Probability

EPSS

12.43%

Percentile

93.78%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.