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1.1.2.5.2 Ensure nodev option set on /var/tmp partition

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Information

The nodev mount option specifies that the filesystem cannot contain special devices.

Since the /var/tmp filesystem is not intended to support devices, set this option to ensure that users cannot create a block or character special devices in /var/tmp.

Solution

- IF - a separate partition exists for /var/tmp.

Edit the /etc/fstab file and add nodev to the fourth field (mounting options) for the /var/tmp partition.

Example:

<device> /var/tmp <fstype> defaults,rw,nosuid,nodev,noexec,relatime 0 0

Run the following command to remount /var/tmp with the configured options:

# mount -o remount /var/tmp

See Also

https://workbench.cisecurity.org/benchmarks/18209

Item Details

References: CSCv7|14.6

Plugin: Unix

Control ID: df5def5c51053e48c1c4e9e2ab31156d04c17e5a291d978b2a92d9028410e519