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You are here: Home / News / Kerentanan Microsoft Azure Mengekspos Database PostgreSQL ke Pelanggan Lain

Kerentanan Microsoft Azure Mengekspos Database PostgreSQL ke Pelanggan Lain

May 4, 2022 by Eevee

Microsoft pada hari Kamis mengungkapkan bahwa itu mengatasi sepasang masalah dengan Database Azure untuk Server Fleksibel PostgreSQL yang dapat mengakibatkan akses database lintas-akun yang tidak sah di suatu wilayah.

“Dengan mengeksploitasi bug izin yang ditingkatkan dalam proses otentikasi Server Fleksibel untuk pengguna replikasi, pengguna jahat dapat memanfaatkan ekspresi reguler yang ditambatkan secara tidak benar untuk melewati otentikasi untuk mendapatkan akses ke basis data pelanggan lain,” kata Microsoft Security Response Center (MSRC).

Perusahaan keamanan cloud yang berbasis di New York City, Wiz, yang mengungkap kelemahan tersebut, menjuluki rantai eksploitasi itu “ExtraReplica.” Microsoft mengatakan telah mengurangi bug dalam waktu 48 jam setelah pengungkapan pada 13 Januari 2022.

Secara khusus, ini terkait dengan kasus eskalasi hak istimewa di mesin Azure PostgreSQL untuk mendapatkan eksekusi kode dan bypass otentikasi lintas-akun melalui sertifikat palsu, yang memungkinkan penyerang membuat database di wilayah Azure target dan mengekstrak informasi sensitif.

Dengan kata lain, keberhasilan eksploitasi kelemahan kritis dapat memungkinkan musuh untuk mendapatkan akses baca yang tidak sah ke database PostgreSQL pelanggan lain, secara efektif menghindari isolasi penyewa.

Wiz menelusuri eskalasi hak istimewa ke bug yang berasal dari modifikasi yang diperkenalkan di mesin PostgreSQL untuk memperkuat model hak istimewanya dan menambahkan fitur baru. Nama ExtraReplica berasal dari fakta bahwa exploit memanfaatkan fitur PostgreSQL yang memungkinkan penyalinan data database dari satu server ke server lain, yaitu, “mereplikasi” database.

Pembuat Windows menggambarkan kerentanan keamanan sebagai mempengaruhi contoh Server Fleksibel PostgreSQL yang digunakan menggunakan opsi jaringan akses publik, tetapi menekankan bahwa itu tidak menemukan bukti kelemahan yang dieksploitasi secara aktif dan bahwa tidak ada data pelanggan yang diakses.

Sumber: The Hacker News

Tagged With: Microsoft Azure, PostgreSQL

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