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SeriousSAM

Microsoft membagikan workaround untuk kerentanan SeriousSAM Windows 10

July 22, 2021 by Winnie the Pooh

Microsoft telah membagikan solusi untuk kerentanan zero-day Windows 10 yang dijuluki SeriousSAM yang dapat memungkinkan penyerang mendapatkan hak admin pada sistem yang rentan dan mengeksekusi kode dengan hak istimewa SISTEM.

Seperti yang dilaporkan oleh BleepingComputer sebelumnya, peningkatan lokal dari bug hak istimewa (dijuluki SeriousSAM) yang ditemukan di versi Windows yang baru dirilis memungkinkan pengguna dengan hak istimewa rendah untuk mengakses file database Registry yang sensitif.

Kerentanan, yang diungkapkan secara publik oleh peneliti keamanan Jonas Lykkegaard di Twitter dan belum menerima patch resmi, sekarang dilacak oleh Microsoft sebagai CVE-2021-36934.

Seperti yang diungkapkan Microsoft lebih lanjut, kerentanan zero-day ini berdampak pada rilis Windows sejak Oktober 2018, dimulai dengan Windows 10, versi 1809. Lykkegaard juga menemukan bahwa Windows 11 (OS Microsoft yang belum dirilis secara resmi) juga terpengaruh.

Berikut adalah langkah-langkah yang diperlukan untuk memblokir eksploitasi kerentanan ini untuk sementara:

Batasi akses ke konten %windir%\system32\config:

  1. Buka Command Prompt atau Windows PowerShell sebagai administrator.
  2. Jalankan perintah ini: icacls %windir%\system32\config\*.* /inheritance:e

Hapus shadow copies dari Volume Shadow Copy Service (VSS):

  1. Hapus semua titik System Restore dan Shadow volumes yang ada sebelum membatasi akses ke %windir%\system32\config.
  2. Buat titik System Restore baru (jika diinginkan).

Microsoft masih menyelidiki kerentanan ini dan sedang mengerjakan tambalan yang kemungkinan besar akan dirilis sebagai pembaruan keamanan out-of-band akhir pekan ini.

Selengkapnya: Bleeping Computer

Tagged With: Cybersecurity, Microsoft, SeriousSAM, Windows, Zero Day

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