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FortiWeb Web Application Firewall

Fortinet telah memperbaiki kerentanan kritis di SSL VPN dan firewall web

February 8, 2021 by Winnie the Pooh

Fortinet telah memperbaiki beberapa kerentanan parah yang memengaruhi produknya.

Kerentanan berkisar dari Remote Code Execution (RCE) hingga SQL Injection, hingga Denial of Service (DoS) dan berdampak pada produk FortiProxy SSL VPN dan FortiWeb Web Application Firewall (WAF).

Berbagai advisory yang diterbitkan oleh FortiGuard Labs bulan ini dan pada Januari 2021 menyebutkan berbagai kerentanan kritis yang telah ditambal oleh Fortinet pada produk mereka.

Catatan khusus adalah kerentanan CVE-2018-13381 di FortiProxy SSL VPN yang dapat dipicu oleh aktor jarak jauh yang tidak diautentikasi melalui permintaan POST yang dibuat.

Karena buffer overflow di portal SSL VPN FortiProxy, permintaan POST berukuran besar yang dibuat secara khusus, saat diterima oleh produk dapat membuat crash, yang mengarah ke kondisi Denial of Service (DoS).

Demikian pula, CVE-2018-13383 menarik karena penyerang dapat menyalahgunakannya untuk memicu luapan di VPN melalui properti konten HREF JavaScript.

Jika laman web buatan penyerang yang berisi muatan JavaScript diurai oleh FortiProxy SSL VPN, eksekusi kode jarak jauh sangat memungkinkan, sebagai tambahan DoS.

Kerentanan di FortiWeb Web Application Firewall ditemukan dan dilaporkan secara bertanggung jawab oleh peneliti Andrey Medov di Positive Technologies.

“Yang paling berbahaya dari keempat kerentanan ini adalah SQL Injection (CVE-2020-29015) dan Buffer Overflow (CVE-2020-29016) karena eksploitasi mereka tidak memerlukan otorisasi.”

Selengkapnya: Bleeping Computer

Tagged With: Cyber Security, DoS, Fortinet, FortiProxy SSL VPN, FortiWeb Web Application Firewall, RCE, SQL Injection

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