Ensure cramfs kernel module is not available

Cómo se verifica

Método de auditoría: Comando de shell

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

Salida esperada

compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

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

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

tmaegis scan --target linux