Windows L2TP RCE Vulnerability
CVE-2023-21556 Published on January 10, 2023

Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability
Windows Layer 2 Tunneling Protocol (L2TP) Remote Code Execution Vulnerability

Vendor Advisory NVD

Weakness Type

What is an Integer underflow Vulnerability?

The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. This can happen in signed and unsigned cases.

CVE-2023-21556 has been classified to as an Integer underflow vulnerability or weakness.

Products Associated with CVE-2023-21556

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Microsoft Windows Server 2008

Microsoft Windows 7

Microsoft Windows Server 2012

Microsoft Windows Server 2016

Microsoft Windows Rt 8 1

Microsoft Windows 8.1

Microsoft Windows Server 2019

Microsoft Windows Server 2022

Microsoft Windows 10

Microsoft Windows 11

Microsoft Windows

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 7:

Version 6.1.0 and below 6.1.7601.26321 is affected.

Microsoft Windows 7 Service Pack 1:

Version 6.1.0 and below 6.1.7601.26321 is affected.

Microsoft Windows 8.1:

Version 6.3.0 and below 6.3.9600.20778 is affected.

Microsoft Windows Server 2008 Service Pack 2:

Version 6.0.6003.0 and below 6.0.6003.21872 is affected.

Microsoft Windows Server 2008 Service Pack 2 (Server Core installation):

Version 6.0.6003.0 and below 6.0.6003.21872 is affected.

Microsoft Windows Server 2008 Service Pack 2:

Version 6.0.6003.0 and below 6.0.6003.21872 is affected.

Microsoft Windows Server 2008 R2 Service Pack 1:

Version 6.1.7601.0 and below 6.1.7601.26321 is affected.

Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation):

Version 6.1.7601.0 and below 6.1.7601.26321 is affected.

Microsoft Windows Server 2012:

Version 6.2.9200.0 and below 6.2.9200.24075 is affected.

Microsoft Windows Server 2012 (Server Core installation):

Version 6.2.9200.0 and below 6.2.9200.24075 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

3.27%

Percentile

86.98%