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F5's BIG-IP

Vulnerability Dapat Mengarah ke DoS, Eksekusi Kode

February 3, 2023 by Coffee Bean Leave a Comment

F5 memperingatkan tentang vulnerability string format tingkat keparahan tinggi di BIG-IP yang dapat memungkinkan penyerang yang diautentikasi menyebabkan kondisi denial-of-service (DoS) dan berpotensi mengeksekusi kode arbitrer.

Dilacak sebagai CVE-2023-22374, cacat keamanan berdampak pada iControl SOAP, API terbuka yang memungkinkan komunikasi antar sistem, yang berjalan sebagai root.

Antarmuka SOAP dapat diakses dari jaringan, baik melalui port manajemen BIG-IP dan/atau alamat IP mandiri, dan dibatasi untuk akun administratif.

Namun, perusahaan cybersecurity menjelaskan, penyerang tidak dapat membaca memori kecuali mereka memiliki akses ke syslog.

Penyerang dapat merusak layanan dengan menggunakan penentu ‘%s’, dan dapat menggunakan penentu ‘%n’ untuk menulis data arbitrer ke sembarang penunjuk di tumpukan, yang berpotensi menyebabkan eksekusi kode jarak jauh, kata perusahaan keamanan siber.

Menurut penasehat F5, penyerang yang ingin mengeksploitasi kelemahan untuk eksekusi kode pertama-tama harus mengumpulkan informasi tentang lingkungan yang menjalankan komponen yang rentan. Namun, hanya bidang kontrol, bukan bidang data, yang diekspos oleh bug ini.

vulnerability berdampak pada BIG-IP versi 13.1.5, 14.1.4.6 hingga 14.1.5, 15.1.5.1 hingga 15.1.8, 16.1.2.2 hingga 16.1.3, dan 17.0.0. Saat ini tidak ada tambalan yang tersedia untuk vulnerability tersebut, tetapi F5 mengatakan perbaikan terbaru teknik tersedia.

Karena cacat hanya dapat dieksploitasi oleh pengguna yang diautentikasi, akses ke API SOAP iControl harus dibatasi untuk pengguna tepercaya.

CVE-2023-22374 memiliki skor CVSS 7,5 untuk sistem BIG-IP dalam mode penerapan standar, dan skor CVSS 8,5 untuk instans IP-BIG dalam mode aplikasi.

BIG-IP SPK, BIG-IQ, F5OS-A, F5OS-C, NGINX, dan Traffix SDC tidak terpengaruh.

Tagged With: BIG-IP, CVE, Vulnerability

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