InformationThe cramfs filesystem type is a compressed read-only Linux filesystem embedded in small footprint systems. A cramfs image can be used without having to first decompress the image.
Removing support for unneeded filesystem types reduces the local attack surface of the system. If this filesystem type is not needed, disable it.
SolutionEdit or create a file in the /etc/modprobe.d/ directory ending in .conf with a line that reads install cramfs /bin/false and a line the reads blacklist cramfs.
# printf 'install cramfs /bin/false
' >> /etc/modprobe.d/cramfs.conf
Run the following command to unload the cramfs module:
# modprobe -r cramfs
NIST SP 800-53 Rev. 5: