Ensure hfs kernel module is not available

How it is checked

Audit method: Shell command

m=hfs; found=$(find /lib/modules/$(uname -r)/kernel /usr/lib/modules/$(uname -r)/kernel -path "*/hfs*" 2>/dev/null | head -n1); if [ -z "$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

Expected output

compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Unload and disable the hfs kernel module. 1. Run the following commands to unload the hfs kernel module: modprobe -r hfs 2>/dev/null rmmod hfs 2>/dev/null 2. Perform the following to disable the hfs kernel module: Create a file ending in .conf with install hfs /bin/false in the /etc/modprobe.d/ directory. Example: # printf '%s\n' "" "install hfs /bin/false" >> /etc/modprobe.d/60-hfs.conf Create a file ending in .conf with blacklist hfs in the /etc/modprobe.d/ directory. Example: printf '%s\n' "" "blacklist hfs" >> /etc/modprobe.d/60-hfs.conf

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

tmaegis scan --target linux