cyberstrikeus 1.1.18 Ensure nosuid option set on removable media partitions (Not Scored)
Profile Applicability
- Level 1 - Server
- Level 1 - Workstation
Description
The nosuid mount option specifies that the filesystem cannot contain setuid files.
Rationale
Setting this option on a file system prevents users from introducing privileged programs onto the system and allowing non-root users to execute them.
Audit Procedure
# Run the following command and verify that the nosuid option is set on all
# removable media partitions:
mount
Expected Result
All removable media partitions should have the nosuid option set.
Remediation
# Edit the /etc/fstab file and add nosuid to the fourth field (mounting options)
# of all removable media partitions. Look for entries that have mount points
# that contain words such as floppy or cdrom.
# See the fstab(5) manual page for more information.
Default Value
By default, the nosuid option is not set on removable media partitions.
References
- CIS Ubuntu Linux 14.04 LTS Benchmark v2.1.0
Profile
- Level 1