Ensure can kernel module is not available

Cómo se verifica

Método de auditoría: Comando de shell

m=can; found=$(find /lib/modules/$(uname -r)/kernel /usr/lib/modules/$(uname -r)/kernel -path "*/can*" 2>/dev/null | head -n1); if [ -z "$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 can kernel module. 1. Run the following commands to unload the can kernel module: # modprobe -r can 2>/dev/null # rmmod can 2>/dev/null 2. Perform the following to disable the can kernel module: Create a file ending in .conf with install can /bin/false in the /etc/modprobe.d/ directory Example: # printf '\n%s\n' "install can /bin/false" >> /etc/modprobe.d/60-can.conf Create a file ending in .conf with blacklist can in the /etc/modprobe.d/ directory Example: # printf '\n%s\n' "blacklist can" >> /etc/modprobe.d/60-can.conf

Verificar este host

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

tmaegis scan --target linux