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Systemd

Bug keamanan sistem Linux yang buruk terungkap

July 21, 2021 by Winnie the Pooh

Systemd, manajer sistem dan layanan Linux yang sebagian besar telah menggantikan init sebagai program startup dan kontrol utama Linux, selalu mendapat kritik.

Sekarang, dengan penemuan bug keamanan systemd baru oleh Qualys, systemd akan mendapatkan lebih banyak kritikan. Eksploitasi yang berhasil dari kerentanan terbaru ini memungkinkan pengguna yang tidak memiliki hak untuk menyebabkan Denial of Service melalui kernel panic.

Seperti yang ditulis oleh Bharat Jogi, manajer senior Qualys untuk Kerentanan dan Signatures, “Mengingat luasnya permukaan serangan untuk kerentanan ini, Qualys merekomendasikan pengguna untuk segera menerapkan patch untuk kerentanan ini”.

Systemd digunakan di hampir semua distribusi Linux modern. Lubang keamanan khusus ini tiba di kode systemd pada April 2015. Ini bekerja dengan memungkinkan penyerang untuk menyalahgunakan fungsi alloca() dengan cara yang akan mengakibatkan kerusakan memori. Ini memungkinkan seorang peretas untuk merusak systemd dan seluruh sistem operasi.

Secara praktis, ini dapat dilakukan oleh penyerang lokal yang memasang sistem file pada jalur yang sangat panjang. Ini menyebabkan terlalu banyak ruang memori untuk digunakan di tumpukan systemd, yang mengakibatkan sistem crash.

Itu berita buruknya. Kabar baiknya adalah bahwa Red Hat Product Security dan pengembang systemd telah segera menambal lubangnya.

Meskipun tidak ada di semua distro Linux saat ini, Anda akan menemukannya di sebagian besar distro seperti Debian 10 (Buster) dan kerabatnya seperti Ubuntu dan Mint. Oleh karena itu, jika Anda ingin komputer Anda tetap berfungsi, Anda harus menambal versi systemd Anda sesegera mungkin.

Selengkapnya: ZDNet

Tagged With: Bug, Cybersecurity, Linux, Security, Systemd

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