Ensure squashfs kernel module is not available

チェック方法

監査方法: シェルコマンド

m=squashfs; found=$(find /lib/modules/$(uname -r)/kernel /usr/lib/modules/$(uname -r)/kernel -path "*/squashfs*" 2>/dev/null | head -n1); if [ -z "$found" ]; then echo compliant; exit 0; fi; lsmod | awk '{print $1}' | grep -Fxq -- "${m//-/_}" && { echo "$m is loaded"; exit 0; }; cfg=$(modprobe --showconfig 2>/dev/null); printf '%s\n' "$cfg" | grep -Pq -- "^\h*blacklist\h+${m//-/_}\b" || { echo "$m is not blacklisted"; exit 0; }; printf '%s\n' "$cfg" | grep -Pq -- "^\h*install\h+${m//-/_}\h+(/usr)?/bin/(true|false)\b" || { echo "$m install is not disabled"; exit 0; }; echo compliant

期待される出力

compliant

修正方法

修正方法: ガイダンスまたは IaC パッチ

Run the following to unload and disable the squashfs kernel module. This can also be done by running the script included below. Run the following commands to unload the squashfs kernel module: # modprobe -r squashfs 2>/dev/null # rmmod squashfs 2>/dev/null Perform the following to disable the squashfs kernel module: Create a file ending in .conf with install squashfs /bin/false in the /etc/modprobe.d/ directory Example: # printf '\n%s\n' "install squashfs /bin/false" >> squashfs.conf Create a file ending in .conf with blacklist squashfs in the /etc/modprobe.d/ directory Example: # printf '\n%s\n' "blacklist squashfs" >> squashfs.conf Optional remediation script: This script will perform the …

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監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

tmaegis scan --target linux --level 2