Windows Encrypting File System (EFS) Uzaktan Kod Çalıştırma Güvenlik Zafiyeti

Windows Encrypting File System (EFS) Uzaktan Kod Çalıştırma Güvenlik Zafiyeti

Windows Encrypting File System (EFS) ürününde uzaktan kod yürütmeye neden olacak CVSS 3.1 Skoru 9.8 olan bir kritik* güvenlik zafiyeti yayınlanmıştır.

Bu güvenlik zafiyeti aşağıda belirtilen sürümlerde geçerlidir. Yayınlanan zafiyete ilişkin istismar tespit edilmemiş olsa da zafiyetin kritikliği nedeniyle sistemlerin zarar görmemesi için yayınlanan yamaların ilgili bağlantılar üzerinden indirilmesi önerilmektedir.

Etkilenen Sistemler

Aşağıdaki sistemlerin etkilendiği belirtilmiştir;

• Windows Server 2012 R2 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 R2 (Server Core installation)
• Windows Server 2012
• Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
• Windows Server 2008 R2 for x64-based Systems Service Pack 1
• Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
• Windows Server 2008 for x64-based Systems Service Pack 2
• Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
• Windows Server 2008 for 32-bit Systems Service Pack 2
• Windows RT 8.1
• Windows 8.1 for x64-based systems
• Windows 8.1 for 32-bit systems
• Windows 7 for x64-based Systems Service Pack 1
• Windows 7 for 32-bit Systems Service Pack 1
• Windows Server 2016 (Server Core installation)
• Windows Server 2016
• Windows 10 Version 1607 for x64-based Systems
• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 for x64-based Systems
• Windows 10 for 32-bit Systems
• Windows 10 Version 21H2 for x64-based Systems
• Windows 10 Version 21H2 for ARM64-based Systems
• Windows 10 Version 21H2 for 32-bit Systems
• Windows 11 for ARM64-based Systems
• Windows 11 for x64-based Systems
• Windows Server, version 20H2 (Server Core Installation)
• Windows 10 Version 20H2 for ARM64-based Systems
• Windows 10 Version 20H2 for 32-bit Systems
• Windows 10 Version 20H2 for x64-based Systems
• Windows Server, version 2004 (Server Core installation)
• Windows 10 Version 2004 for x64-based Systems
• Windows 10 Version 2004 for ARM64-based Systems
• Windows 10 Version 2004 for 32-bit Systems
• Windows Server 2022 (Server Core installation)
• Windows Server 2022
• Windows 10 Version 21H1 for 32-bit Systems
• Windows 10 Version 21H1 for ARM64-based Systems
• Windows 10 Version 21H1 for x64-based Systems
• Windows 10 Version 1909 for ARM64-based Systems
• Windows 10 Version 1909 for x64-based Systems
• Windows 10 Version 1909 for 32-bit Systems
• Windows Server 2019 (Server Core installation)
• Windows Server 2019
• Windows 10 Version 1809 for ARM64-based Systems
• Windows 10 Version 1809 for x64-based Systems
• Windows 10 Version 1809 for 32-bit Systems

IoC’ler

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Çözüm Önerileri

Aşağıdaki link’te belirtilen güncellemelerin yüklenmesi önerilmektedir.

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-43217

CVE / CWE

CVE-2021-43217

Ek Bilgiler

• https://nvd.nist.gov/vuln/detail/CVE-2021-43217
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-43217

* CVSS 3.1 skoru (10 üzerinden) 7.0-8.9 olanlar “yüksek”, 9.0-10.0 olanlar “kritik” zafiyet olarak değerlendirilmektedir.