cyberstrikeus Ensure nosuid option set on removable media partitions
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.
Impact
None noted.
Audit Procedure
Command Line
# Run the following command and verify that the nosuid option is set on all removable media partitions.
mount
Expected Result
Verify that the nosuid option is set on all removable media partitions.
Remediation
Command Line
# 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
Not set by default.
References
- CIS Controls Version 7 - 5.1 Establish Secure Configurations: Maintain documented, standard security configuration standards for all authorized operating systems and software.
Profile
Level 1 - Server / Level 1 - Workstation, Assessment: Manual