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You are here: Home / News / Mozilla memperbaiki bug kritis di perpustakaan kriptografi lintas platform

Mozilla memperbaiki bug kritis di perpustakaan kriptografi lintas platform

December 2, 2021 by Eevee

Mozilla telah mengatasi kerentanan kerusakan memori kritis yang memengaruhi rangkaian pustaka kriptografi Layanan Keamanan Jaringan (NSS) lintas platform.

NSS dapat digunakan untuk mengembangkan aplikasi klien dan server yang mendukung keamanan dengan dukungan untuk sertifikat SSL v3, TLS, PKCS #5, PKCS #7, PKCS #11, PKCS #12, S/MIME, X.509 v3, dan berbagai sertifikat lainnya. standar keamanan.

Kelemahan keamanan ditemukan oleh peneliti kerentanan Google Tavis Ormandy dalam versi NSS sebelum 3.73 atau 3.68.1 ESR—yang juga menjulukinya BigSig—dan sekarang dilacak sebagai CVE-2021-43527.

Ini dapat menyebabkan buffer overflow berbasis heap saat menangani tanda tangan DSA atau RSA-PSS yang dikodekan DER di klien email dan pemirsa PDF menggunakan versi NSS yang rentan (bug telah diperbaiki di NSS 3.68.1 dan NSS 3.73).

Dampak dari eksploitasi heap overflow yang berhasil dapat berkisar dari crash program dan eksekusi kode arbitrer hingga melewati perangkat lunak keamanan jika eksekusi kode tercapai.

“Aplikasi yang menggunakan NSS untuk menangani tanda tangan yang dikodekan dalam CMS, S/MIME, PKCS #7, atau PKCS #12 kemungkinan akan terpengaruh,” kata Mozilla dalam peringatan keamanan yang dikeluarkan hari ini.

“Aplikasi yang menggunakan NSS untuk validasi sertifikat atau fungsionalitas TLS, X.509, OCSP, atau CRL lainnya dapat terpengaruh, bergantung pada cara mereka mengonfigurasi NSS.”

“Kami yakin semua versi NSS sejak 3.14 (dirilis Oktober 2012) rentan,” Ormandy menambahkan pada pelacak masalah Project Zero.

Untungnya, menurut Mozilla, kerentanan ini tidak memengaruhi browser web Mozilla Firefox. Namun, semua pemirsa PDF dan klien email yang menggunakan NSS untuk verifikasi tanda tangan diyakini akan terpengaruh.

NSS digunakan oleh Mozilla, Red Hat, SUSE, dan lainnya dalam berbagai macam produk, termasuk:

  • Firefox, Thunderbird, SeaMonkey, dan Firefox OS.
  • Aplikasi klien sumber terbuka seperti Evolution, Pidgin, Apache OpenOffice, dan LibreOffice.
  • Produk server dari Red Hat: Red Hat Directory Server, Red Hat Certificate System, dan modul SSL mod_nss untuk server web Apache.
  • Produk server dari Oracle (sebelumnya Sun Java Enterprise System), termasuk Oracle Communications Messaging Server dan Oracle Directory Server Enterprise Edition.
  • SUSE Linux Enterprise Server mendukung NSS dan modul SSL mod_nss untuk server web Apache.

Sumber : Bleeping Computer

Tagged With: Bug, CVE-2021-43527, kerentanan, Mozilla, Mozilla Firefox, NSS

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