1.1.1.1 Ensure mounting of cramfs filesystems is disabled - lsmod

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 a file in the /etc/modprobe.d/ directory ending in .conf
Example: vim /etc/modprobe.d/cramfs.conf
and add the following line:

install cramfs /bin/true

Run the following command to unload the cramfs module:

# rmmod cramfs

See Also

https://workbench.cisecurity.org/files/3399

Item Details

Category: CONFIGURATION MANAGEMENT, SYSTEM AND SERVICES ACQUISITION

References: 800-53|CM-1, 800-53|CM-2, 800-53|CM-6, 800-53|CM-7, 800-53|CM-7(1), 800-53|CM-9, 800-53|SA-3, 800-53|SA-8, 800-53|SA-10, CSCv6|13, CSCv7|5.1, CSCv7|13

Plugin: Unix

Control ID: f36048debd6846e78f7760d25a99963e9ba8f2ef6b8eb8b56d9af7035d56b1ec