Windows Crypt32.dll, (Elliptic Curve Cryptography ECC) sertifikalarını doğrulama şeklinde kimlik sahtekarlığına imkan sağlayacak güvenlik açığı tespit edilmiştir.
Saldırgan, uzaktan kötü amaçlı dosya çalıştırarak sahte imzalama sertifikası ile bu güvenlik açığından yararlanabilir. Dosya yada dosyların güvenilir kaynaktan geldiğini gösterebilir.
Güvenlik güncelleştirmesi, Windows CryptoAPI’nin ECC sertifikalarını tamamen doğrulamasını sağlayarak bu güvenlik açığını giderir.
Windows 10, Windows Server 2016 ve Windows Server 2019 işletim sistemleri için kritik bir güncellemedir. Sistemlerinizde KB4534306 ID li güncelleme paketini yüklü olup olmadığını kontrol
ediniz. Yüklü değil ise aşağıdaki linklerden en kısa zamanda ilgili güncelleme paketini yüklemenizi öneririm:
| Windows 10 for 32-bit Systems | 4534306 | Security Update | Spoofing | Important |
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| Windows 10 for x64-based Systems | 4534306 | Security Update | Spoofing | Important |
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| Windows 10 Version 1607 for 32-bit Systems | 4534271 | Security Update | Spoofing | Important |
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| Windows 10 Version 1607 for x64-based Systems | 4534271 | Security Update | Spoofing | Important |
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| Windows 10 Version 1709 for 32-bit Systems | 4534276 | Security Update | Spoofing | Important |
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| Windows 10 Version 1709 for ARM64-based Systems | 4534276 | Security Update | Spoofing | Important |
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| Windows 10 Version 1709 for x64-based Systems | 4534276 | Security Update | Spoofing | Important |
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| Windows 10 Version 1803 for 32-bit Systems | 4534293 | Security Update | Spoofing | Important |
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| Windows 10 Version 1803 for ARM64-based Systems | 4534293 | Security Update | Spoofing | Important |
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| Windows 10 Version 1803 for x64-based Systems | 4534293 | Security Update | Spoofing | Important |
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| Windows 10 Version 1809 for 32-bit Systems | 4534273 | Security Update | Spoofing | Important |
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| Windows 10 Version 1809 for ARM64-based Systems | 4534273 | Security Update | Spoofing | Important |
4530715
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| Windows 10 Version 1809 for x64-based Systems | 4534273 | Security Update | Spoofing | Important |
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| Windows 10 Version 1903 for 32-bit Systems | 4528760 | Security Update | Spoofing | Important |
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| Windows 10 Version 1903 for ARM64-based Systems | 4528760 | Security Update | Spoofing | Important |
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| Windows 10 Version 1903 for x64-based Systems | 4528760 | Security Update | Spoofing | Important |
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| Windows 10 Version 1909 for 32-bit Systems | 4528760 | Security Update | Spoofing | Important |
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| Windows 10 Version 1909 for ARM64-based Systems | 4528760 | Security Update | Spoofing | Important |
4530684
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| Windows 10 Version 1909 for x64-based Systems | 4528760 | Security Update | Spoofing | Important |
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| Windows Server 2016 | 4534271 | Security Update | Spoofing | Important |
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| Windows Server 2016 (Server Core installation) | 4534271 | Security Update | Spoofing | Important |
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| Windows Server 2019 | 4534273 | Security Update | Spoofing | Important |
4530715
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| Windows Server 2019 (Server Core installation) | 4534273 | Security Update | Spoofing | Important |
4530715
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| Windows Server, version 1803 (Server Core Installation) | 4534293 | Security Update | Spoofing | Important |
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| Windows Server, version 1903 (Server Core installation) | 4528760 | Security Update | Spoofing | Important |
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| Windows Server, version 1909 (Server Core installation) | 4528760 | Security Update | Spoofing | Important |
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