cyberstrikeus 2.2 Set nodev option for /tmp Partition (Scored)
Profile Applicability
- Level 1
Description
The nodev mount option specifies that the filesystem cannot contain special devices.
Rationale
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.
Audit Procedure
Using Command Line
grep /tmp /etc/fstab | grep nodev
mount | grep /tmp | grep nodev
Expected Result
Both commands should return output showing nodev is set. If either command emits no output then the system is not configured as recommended.
Remediation
Using Command Line
Edit the /etc/fstab file and add nodev to the fourth field (mounting options). See the fstab(5) manual page for more information.
mount -o remount,nodev /tmp
Default Value
By default, the nodev option is not set on the /tmp partition.
References
- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
Profile
Level 1 - Scored