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Zyxel memperingatkan kelemahan yang memengaruhi firewall, AP, dan pengontrol

May 27, 2022 by Eevee

Zyxel telah menerbitkan penasihat keamanan untuk memperingatkan admin tentang beberapa kerentanan yang memengaruhi berbagai produk firewall, AP, dan pengontrol AP.

Meskipun kerentanan tidak dinilai kritis, kerentanan itu sendiri masih signifikan dan dapat disalahgunakan oleh aktor ancaman sebagai bagian dari rantai eksploitasi.

Organisasi besar menggunakan produk Zyxel, dan setiap kelemahan yang dapat dieksploitasi di dalamnya segera menarik perhatian pelaku ancaman.

Empat kelemahan yang diungkapkan dalam penasehat Zyxel adalah sebagai berikut:

  • CVE-2022-0734: Kerentanan skrip lintas situs dengan tingkat keparahan sedang (CVSS v3.1 – 5.8) dalam komponen CGI, memungkinkan penyerang menggunakan skrip pencurian data untuk mengambil cookie dan token sesi yang disimpan di browser pengguna.
  • CVE-2022-26531: Tingkat keparahan sedang (CVSS v3.1 – 6.1) cacat validasi yang tidak tepat di beberapa perintah CLI, memungkinkan penyerang terotentikasi lokal menyebabkan buffer overflow atau sistem crash.
  • CVE-2022-26532: Cacat injeksi perintah tingkat keparahan tinggi (CVSS v3.1 – 7.8) di beberapa perintah CLI, memungkinkan penyerang terotentikasi lokal untuk mengeksekusi perintah OS yang sewenang-wenang.
  • CVE-2022-0910: Tingkat keparahan sedang (CVSS v3.1 – 6.5) otentikasi memotong kerentanan dalam komponen CGI, memungkinkan penyerang untuk menurunkan versi dari otentikasi dua faktor ke otentikasi satu faktor melalui klien VPN IPsec.
  • Kerentanan di atas berdampak pada USG/ZyWALL, USG FLEX, ATP, VPN, firewall NSG, pengontrol AP NXC2500 dan NXC5500, dan berbagai produk Titik Akses, termasuk model seri NAP, NWA, WAC, dan WAX.

    Produk firewall yang terkena dampak (Zyxel)

    Zyxel telah merilis pembaruan keamanan yang mengatasi masalah untuk sebagian besar model yang terpengaruh.

    Namun, admin harus meminta perbaikan terbaru dari perwakilan layanan lokal mereka untuk pengontrol AP karena perbaikan tidak tersedia untuk umum.

    Untuk firewall, USG/ZyWALL mengatasi masalah dengan firmware versi 4.72, USG FLEX, ATP, dan VPN harus ditingkatkan ke ZLD versi 5.30, dan produk NSG menerima perbaikan melalui v1.33 patch 5.

    Meskipun kerentanan ini tidak kritis, tetap sangat disarankan agar admin jaringan memutakhirkan perangkat mereka sesegera mungkin.

    Sumber: Bleeping Computer

Tagged With: AP, Firewall, Zyxel

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