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Load Value Injection

Intel SGX rentan terhadap kesalahan yang tidak dapat diperbaiki yang dapat mencuri kunci crypto dan banyak lagi

March 12, 2020 by Winnie the Pooh

Selama 26 bulan terakhir, Intel dan pembuat CPU lainnya telah diserang oleh Specter, Meltdown, dan kerentanan lainnya yang memungkinkan penyerang untuk mendapatkan kata sandi, kunci enkripsi, dan data sensitif lainnya dari memori komputer. 

 

Pada hari Selasa, para peneliti mengungkapkan kelemahan baru yang memungkinkan penyerang untuk mencuri informasi dari Intel SGX, kependekan dari Software Guard eXtensions, yang bertindak sebagai brankas digital untuk mengamankan data rahasia pengguna yang paling sensitif. 

 

Load Value Injection, sebagaimana peneliti telah menyebut serangan proof-of-concept mereka, bekerja dengan cara yang mirip dengan kerentanan sebelumnya dan menyelesaikan hal yang sama. Semua itu disebut cacat transient-execution berasal dari eksekusi spekulatif, sebuah optimasi di mana CPU mencoba untuk menebak instruksi masa depan sebelum mereka dipanggil. 

 

Meltdown dan Specter adalah eksploitasi transient-execution pertama yang dipublikasi. Lalu serangan berikutnya bernama ZombieLoad, RIDL, Fallout, dan Foreshadow segera mengikuti. Foreshadow juga bekerja melawan Intel SGX.

 

Peneliti mengatakan, “Tidak seperti serangan tipe Meltdown sebelumnya, LVI tidak dapat dimitigasi secara transparan dalam prosesor yang ada dan mengharuskan patch perangkat lunak yang mahal, yang dapat memperlambat perhitungan Intel SGX enclave 2 hingga 19 kali.”

 

Berita selengkapnya dapat diakses pada tautan di bawah ini;

Source: Ars Technica | Daftar prosesor yang terpengaruh

Tagged With: CPU, Intel, Load Value Injection, SGX, Vulnerability

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