Ensure squashfs kernel module is not available

Kako se proverava

Metod provere: Komanda ljuske

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

Očekivani izlaz

compliant

Kako se ispravlja

Metod ispravke: Smernica ili zakrpa infrastrukture

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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tmaegis scan --target linux --level 2