cyberstrikeus 1.1.7 Ensure nodev option set on /var/tmp partition (Scored)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
The nodev mount option specifies that the filesystem cannot contain special devices.
Rationale
Since the /var/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 /var/tmp.
Audit Procedure
mount | grep /var/tmp
# Verify that the nodev option is set on /var/tmp
# Expected output: tmpfs on /var/tmp type tmpfs (rw,nosuid,nodev,noexec,relatime)
Expected Result
The output should show the nodev option is set for the /var/tmp partition.
Remediation
# Edit the /etc/fstab file and add nodev to the fourth field (mounting options)
# for the /var/tmp partition. See the fstab(5) manual page for more information.
# Run the following command to remount /var/tmp:
mount -o remount,nodev /var/tmp
Default Value
By default, the nodev option is not set on /var/tmp.
References
- CIS Ubuntu Linux 14.04 LTS Benchmark v2.1.0
Profile
- Level 1