cyberstrikeus 2.14 Add nodev Option to /run/shm Partition (Scored)
Profile Applicability
- Level 1
Description
The nodev mount option specifies that the /run/shm (temporary filesystem stored in memory) cannot contain block or character special devices.
Rationale
Since the /run/shm filesystem is not intended to support devices, set this option to ensure that users cannot attempt to create special devices in /run/shm partitions.
Audit Procedure
Using Command Line
grep /run/shm /etc/fstab | grep nodev
mount | grep /run/shm | 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 of entries that have mount points that contain /run/shm). See the fstab(5) manual page for more information.
mount -o remount,nodev /run/shm
Default Value
By default, the nodev option is not set on the /run/shm partition.
References
- CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
Profile
Level 1 - Scored