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You are here: Home / News / Acer Memperbaiki Bug UEFI yang Dapat menonaktifkan Secure Boot

Acer Memperbaiki Bug UEFI yang Dapat menonaktifkan Secure Boot

November 29, 2022 by Coffee Bean

Acer telah memperbaiki kerentanan tingkat tinggi yang memengaruhi beberapa model laptop yang dapat memungkinkan penyerang lokal untuk menonaktifkan UEFI Secure Boot pada sistem yang ditargetkan.

Fitur keamanan Secure Boot memblokir bootloader sistem operasi yang tidak tepercaya di komputer dengan chip Trusted Platform Module (TPM) dan firmware Unified Extensible Firmware Interface (UEFI) untuk mencegah kode berbahaya seperti rootkit dan bootkit dimuat selama proses startup.

Penyerang dengan hak istimewa tinggi dapat menyalahgunakannya dalam serangan dengan kompleksitas rendah yang tidak memerlukan interaksi pengguna untuk mengubah pengaturan UEFI Secure Boot dengan memodifikasi variabel NVRAM BootOrderSecureBootDisable untuk menonaktifkan Secure Boot.

Setelah mengeksploitasi kerentanan pada laptop Acer yang terpengaruh dan mematikan Secure Boot, pelaku ancaman dapat membajak proses pemuatan OS dan memuat bootloader yang tidak ditandatangani untuk melewati atau menonaktifkan perlindungan dan menyebarkan muatan berbahaya dengan hak istimewa sistem.

Pembaruan BIOS tersedia, pembaruan Windows masuk
pelanggan dapat mengunduh pembaruan BIOS dari situs web dukungan perusahaan dan menerapkannya secara manual pada sistem yang terpengaruh.

Mengizinkan pelaku ancaman untuk menjalankan kode berbahaya yang tidak ditandatangani sebelum boot OS dapat menyebabkan konsekuensi yang parah, termasuk penyebaran malware yang dapat bertahan di antara penginstalan ulang OS dan melewati perlindungan anti-malware yang disediakan oleh solusi keamanan.

sumber : bleeping computer

Tagged With: Acer, BIOS, Bug, Firmware, Laptop, Secure Boot, UEFI, Vulnerability

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