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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/26893

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-7(2), CCI|CCI-001764, CSCv7|14.6, Rule-ID|SV-230511r958804_rule, Rule-ID|SV-257866r958804_rule, Rule-ID|SV-269317r1050199_rule

Plugin: Unix

Control ID: 77a97178758adef3dae75f5148c7c17854c3faab8b86132001aa607c1d16f4fd