2.18 Disable Mounting of cramfs Filesystems

Information

The 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.

*Rationale*

Removing support for unneeded filesystem types reduces the local attack surface of the
server. If this filesystem type is not needed, disable it.

Solution

Edit or create the file /etc/modprobe.d/CIS.conf and add the following line-install cramfs /bin/true

See Also

https://workbench.cisecurity.org/files/91

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CSCv6|3.1

Plugin: Unix

Control ID: a410868fc5e96d3374c55052d00157d0cdbbccb7faff3ca71d90059185bc1c55