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Rewterz Threat Advisory – Multiple Microsoft Windows Layer 2 Tunneling Protocol (L2TP) Vulnerabilities
January 17, 2023
Rewterz
Rewterz Threat Advisory – Multiple Windows Cryptographic Vulnerabilities
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Rewterz Threat Advisory – Multiple Microsoft Windows Internet Key Exchange (IKE) Extension Vulnerabilities

Severity

High

Analysis Summary

CVE-2023-21677 CVSS:7.5

Microsoft Windows is vulnerable to a denial of service, caused by a flaw in the Internet Key Exchange (IKE) Extension. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service condition.

CVE-2023-21683 CVSS:7.5

Microsoft Windows is vulnerable to a denial of service, caused by a flaw in the Internet Key Exchange (IKE) Extension. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service condition.

CVE-2023-21758 CVSS:7.5

Microsoft Windows is vulnerable to a denial of service, caused by a flaw in the Internet Key Exchange (IKE) Extension. By sending a specially-crafted request, a remote attacker could exploit this vulnerability to cause a denial of service condition.

Impact

  • Denial of Service

Indicators Of Compromise

CVE

  • CVE-2023-21677
  • CVE-2023-21683
  • CVE-2023-21758

Affected Vendors

Microsoft

Affected Products

  • Microsoft Windows Server 2012
  • Microsoft Windows 8.1 x32
  • Microsoft Windows 8.1 x64
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows RT 8.1
  • Microsoft Windows 10 x32
  • Microsoft Windows 10 x64
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2019
  • Microsoft Windows 10 1809 for x64-based Systems
  • Microsoft Windows 10 1809 for 32-bit Systems
  • Microsoft Windows 10 1809 for ARM64-based Systems
  • Microsoft Windows 10 1607 for 32-bit Systems
  • Microsoft Windows 10 1607 for x64-based Systems
  • Microsoft Windows 10 20H2 for 32-bit Systems
  • Microsoft Windows 10 20H2 for ARM64-based Systems
  • Microsoft Windows 10 20H2 for x64-based Systems
  • Microsoft Windows Server (Server Core installation) 2019
  • Microsoft Windows Server (Server Core installation) 2016
  • Microsoft Windows Server (Server Core installation) 2012
  • Microsoft Windows Server 2022
  • Microsoft Windows Server (Server Core installation) 2022
  • Microsoft Windows 10 21H2 for 32-bit Systems
  • Microsoft Windows 10 21H2 for ARM64-based Systems
  • Microsoft Windows 10 21H2 for x64-based Systems
  • Microsoft Windows 11 22H2 for ARM64-based Systems
  • Microsoft Windows 11 22H2 for x64-based Systems
  • Microsoft Windows 10 22H2 for 32-bit Systems
  • Microsoft Windows 10 22H2 for x64-based Systems
  • Microsoft Windows Server 2022 Datacenter: Azure Edition
  • Microsoft Windows 11 21H2 for ARM64-based Systems
  • Microsoft Windows 11 21H2 for x64-based Systems
  • Microsoft Windows 10 22H2 for ARM64-based Systems

Remediation

Use Microsoft Automatic Update to apply the appropriate patch for your system, or the Microsoft Security Update Guide to search for available patches.

CVE-2023-21677

CVE-2023-21683

CVE-2023-21758