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TIPC

Ini bisa menjadi waktu yang tepat untuk menambal kernel Linux Anda

November 10, 2021 by Winnie the Pooh

Peneliti keamanan siber telah membantu memperbaiki kerentanan keamanan heap-overflow kritis di kernel Linux yang dapat dieksploitasi baik secara lokal atau melalui eksekusi kode jarak jauh (RCE) untuk membahayakan komputer Linux yang rentan.

Ditemukan oleh peneliti SentinelLabs Max Van Amerongen, kerentanan yang dilacak sebagai CVE-2021-43267 ada dalam modul Transparan Inter Process Communication (TIPC) kernel, khususnya dalam jenis pesan yang memungkinkan node untuk saling mengirim kunci kriptografi.

“Kerentanan ini dapat dieksploitasi baik secara lokal maupun jarak jauh. Sementara eksploitasi lokal lebih mudah karena kontrol yang lebih besar atas objek yang dialokasikan di tumpukan kernel, eksploitasi jarak jauh dapat dicapai berkat struktur yang didukung TIPC,” catat Amerongen.

Karena jenis pesan yang terpengaruh relatif baru, bug hanya ada di rilis kernel antara v5.10 dan v5.15.

Peneliti menjelaskan bahwa jenis pesan yang rentan, yang disebut MSG_CRYPTO, diperkenalkan pada September 2020, untuk bertukar kunci kriptografi.

Namun, Amerongen menemukan bahwa meskipun jenis pesan membuat berbagai alokasi untuk mentransfer kunci, ia gagal untuk memeriksa dan memvalidasi beberapa di antaranya.

Patch telah dirilis yang menambahkan pemeriksaan verifikasi ukuran yang sesuai ke proses, yang telah ditambahkan ke rilis utama Linux 5.15 Long Term Support (LTS).

Sumber: Tech Radar

Tagged With: Cybersecurity, Linux, RCE, TIPC, Vulnerability

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