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1.1.1.6 Ensure mounting of squashfs filesystems is disabled

Warning! Audit Deprecated

This audit has been deprecated and will be removed in a future update.

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Information

The squashfs filesystem type is a compressed read-only Linux filesystem embedded in small footprint systems (similar to cramfs). A squashfs 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.

Solution

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

See Also

https://benchmarks.cisecurity.org/tools2/linux/CIS_Ubuntu_Linux_14.04_LTS_Benchmark_v2.0.0.pdf

Item Details

Category: CONFIGURATION MANAGEMENT

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

Plugin: Unix

Control ID: 63a8dcc53dbdef1e3aaac5aa4053d8f4e285f001797e994daaa08dc5e329be9b