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1.1.2.1.2 Ensure nodev option set on /tmp partition

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Information

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

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

Solution

- IF - a separate partition exists for /tmp.

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

Example:

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

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

# mount -o remount /tmp

See Also

https://workbench.cisecurity.org/benchmarks/18211

Item Details

References: CSCv7|9.2

Plugin: Unix

Control ID: 3f765555a1f1c0319e9518932c306cc6517e0683094fb26417c3253e32e7d27c