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1.1.1.1 Ensure mounting of cramfs filesystems is disabled - modprobe

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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/2485

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-7b., CSCv6|3.1

Plugin: Unix

Control ID: 18b78ffcc5678ba16ea50541f50721e1cce3b87a8e2a51f5fdb9e5492e429e6d