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1.1.2.1.2 Ensure nodev option set on /tmp partition

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/19886

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6, 800-53|CM-7, 800-53|CM-7(2), CAT|II, CSCv7|9.2, Rule-ID|SV-230511r854052_rule, Vuln-ID|V-230511

Plugin: Unix

Control ID: d604a32a1b1749d69c42af61cfe0bce0e34c711a639ae441aa3a05531ee7e858