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HTTP.sys

Microsoft: Kerentanan HTTP Windows kritis baru dapat di-worm

January 12, 2022 by Eevee

Microsoft telah menambal kelemahan kritis yang ditandai sebagai wormable dan ditemukan berdampak pada desktop dan server versi Windows terbaru, termasuk Windows 11 dan Windows Server 2022.

Bug, dilacak sebagai CVE-2022-21907 dan ditambal selama Patch Tuesday bulan ini, ditemukan di HTTP Protocol Stack (HTTP.sys) yang digunakan sebagai pendengar protokol untuk memproses permintaan HTTP oleh server web Windows Internet Information Services (IIS). .

Eksploitasi yang berhasil memerlukan pelaku ancaman untuk mengirim paket yang dibuat dengan jahat ke server Windows yang ditargetkan, yang menggunakan HTTP Protocol Stack yang rentan untuk memproses paket.

Microsoft merekomendasikan pengguna untuk memprioritaskan penambalan kelemahan ini pada semua server yang terpengaruh karena ini dapat memungkinkan penyerang yang tidak terautentikasi untuk mengeksekusi kode arbitrer dari jarak jauh dalam serangan dengan kompleksitas rendah dan “dalam kebanyakan situasi,” tanpa memerlukan interaksi pengguna.

Pada beberapa versi Windows (yaitu, Windows Server 2019 dan Windows 10 versi 1809), fitur Dukungan Trailer HTTP yang berisi bug tidak diaktifkan secara default.

Menurut Microsoft, kunci registri Windows berikut harus dikonfigurasi pada dua versi Windows ini untuk memperkenalkan kerentanan:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\HTTP\Parameters\

“EnableTrailerSupport”=dword:00000001

Menonaktifkan fitur Dukungan Trailer HTTP akan melindungi sistem yang menjalankan dua versi, tetapi mitigasi ini tidak berlaku untuk rilis Windows lain yang terpengaruh.

Dalam dua tahun terakhir, Microsoft telah menambal beberapa bug wormable lainnya, berdampak pada Windows DNS Server (juga dikenal sebagai SIGRed), platform Remote Desktop Services (RDS) (alias BlueKeep), dan protokol Server Message Block v3 (alias SMBGhost) .

Redmond juga mengatasi kerentanan Windows HTTP RCE lainnya pada Mei 2021 (dilacak sebagai CVE-2021-31166 dan juga ditandai sebagai wormable), di mana peneliti keamanan merilis kode eksploitasi demo yang dapat memicu layar biru kematian.

Namun, pelaku ancaman belum mengeksploitasinya untuk membuat malware yang dapat menginfeksi yang mampu menyebar di antara sistem rentan yang menjalankan perangkat lunak Windows yang rentan.

Sumber : Bleeping Computer

Tagged With: HTTP, HTTP.sys, Microsoft, Windows

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