CVE-2023-21757: Windows Layer 2 Tunneling Protocol (L2TP) Denial of Service Vulnerability
Published Jan 10, 2023
·Updated
Windows Layer 2 Tunneling Protocol (L2TP) Denial of Service Vulnerability
Affected Software
63 affected componentsFixes available
Microsoft Windows Server 2012 R2
Microsoft Windows 7
Microsoft Windows 7
Microsoft Windows Server 2012 R2
Microsoft Windows RT 8.1
Microsoft Windows Server 2012
Microsoft Windows Server 2012
Microsoft Windows Server 2008
Microsoft Windows Server 2008
Microsoft Windows Server 2008
Microsoft Windows Server 2008
Microsoft Windows 8.1 for x64-based systems
Microsoft Windows 8.1 for 32-bit systems
Microsoft Windows Server 2019
Microsoft Windows Server 2019
Microsoft Windows 11=22H2
Microsoft Windows 11=22H2
Microsoft Windows 11=21H2
Microsoft Windows 11=21H2
Microsoft Windows Server 2022
Microsoft Windows Server 2022
Microsoft Windows Server 2016
Microsoft Windows Server 2016
Microsoft Windows 10=20H2
Microsoft Windows 10=20H2
Microsoft Windows 10=20H2
Microsoft Windows 10=1809
Microsoft Windows 10=1809
Microsoft Windows 10=1809
Microsoft Windows 10=22H2
Microsoft Windows 10=22H2
Microsoft Windows 10=22H2
Microsoft Windows 10=1607
Microsoft Windows 10=1607
Microsoft Windows 10=21H2
Microsoft Windows 10=21H2
Microsoft Windows 10=21H2
Microsoft Windows 10
Microsoft Windows 10
Microsoft Windows 10
Microsoft Windows 10=20h2
Microsoft Windows 10=21h2
Microsoft Windows 10=22h2
Microsoft Windows 10=1607
Microsoft Windows 10=1809
Microsoft Windows 11
Microsoft Windows 11
Microsoft Windows 11=21h2
Microsoft Windows 11=21h2
Microsoft Windows 11=22h2
Microsoft Windows 11=22h2
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 2019
Microsoft Windows Server 2022
Microsoft Windows Server 2008 R2
Microsoft Windows Server 2008 R2
Event History
Jan 10, 2023
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionSeverity
Data Sourced
via Microsoft·08:00 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·10:15 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2023-21757?
CVE-2023-21757 has been rated as Critical severity due to its potential to cause Denial of Service.
2
How do I fix CVE-2023-21757?
To fix CVE-2023-21757, apply the appropriate security updates and patches provided by Microsoft for affected Windows versions.
3
Which versions of Windows are affected by CVE-2023-21757?
CVE-2023-21757 affects various versions of Windows including Windows 10, Windows 11, and Windows Server from different release versions.
4
What impact does CVE-2023-21757 have on my system?
CVE-2023-21757 can allow an attacker to cause a Denial of Service, resulting in system downtime.
5
Is there a specific patch for CVE-2023-21757?
Yes, Microsoft has released several patches for CVE-2023-21757 which should be applied based on your specific Windows version.