1.1.3 Ensure nodev option set on /tmp partition (Scored)

Level 1 - Server 
Level 1 - Workstation

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 attempt to create block or character special devices in /tmp.

If a /tmp partition exists run the following command and verify that the nodev option is set on /tmp:

# mount | grep /tmp 
tmpfs on /tmp type tmpfs (rw,nosuid,nodev,noexec,relatime)

Edit the /etc/fstab file and add nodev to the fourth field (mounting options) for the /tmp partition. See the fstab(5) manual page for more information.
Run the following command to remount /tmp:

# mount -o remount,nodev /tmp

systemd includes the tmp.mount service which should be used instead of configuring /etc/fstab. Mounting options are configured in the Options setting in /etc/systemd/system/tmp.mount.

  • ubuntu1604/1/1/3.txt
  • Last modified: 2017/05/02 14:11
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