Ensure address space layout randomization (ASLR) is enabled

SedangLevel 1Otomatislinux

Deskripsi

Address space layout randomization (ASLR) is an exploit mitigation technique which randomly arranges the address space of key data areas of a process.

Cara pemeriksaan

Metode audit: Perintah shell

shell

chk() { p=$1; allowed=" $2 "; case $p in net.ipv6.*) [ -d /proc/sys/net/ipv6 ] || return 0;; esac; v=$(sysctl -n "$p" 2>/dev/null) || { echo "$p: not available"; return 1; }; case "$allowed" in *" $v "*) ;; *) echo "$p is $v (running)"; return 1;; esac; sd=$(readlink -e /lib/systemd/systemd-sysctl || readlink -e /usr/lib/systemd/systemd-sysctl); f=$("$sd" --cat-config 2>/dev/null | grep -Po "^\h*${p//./\.}\h*=\h*\K\H+" | tail -n1); [ -n "$f" ] || { echo "$p is not set in any sysctl configuration file"; return 1; }; case "$allowed" in *" $f "*) ;; *) echo "$p is $f in configuration"; return 1;; esac; }; if chk kernel.randomize_va_space 2; then echo compliant; fi

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Panduan atau patch infrastruktur

Set the following parameter in /etc/sysctl.conf or a /etc/sysctl.d/* file: kernel.randomize_va_space = 2 Run the following command to set the active kernel parameter: # sysctl -w kernel.randomize_va_space=2

Properti

Sistem operasi: alinux-2
Tag: cis-convertedkernellinuxsysctl
Referensi: CIS Aliyun Linux 2 Benchmark v1.0.0 ARCHIVE - 1.5.2

Periksa host ini

Jalankan ini pada mesin yang diizinkan untuk Anda audit. Pemindaian bersifat hanya baca.

shell

tmaegis scan --target linux