1.1.4 Ensure nosuid option set on /tmp partition

Information

The nosuid mount option specifies that the filesystem cannot contain setuid files. Since the /tmp filesystem is only intended for temporary file storage, set this option to ensure that users cannot create setuid files in /tmp.

Solution

Edit the /etc/fstab file and add nosuid to the fourth field (mounting options) for the /tmp partition. See the fstab(5) manual page for more information. Run the following command to remount /tmp: # mount -o remount,nosuid /tmp

See Also

https://workbench.cisecurity.org/files/1866

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-6(10)

Plugin: Unix

Control ID: 34362913a3f5ed0543166be35660d77dc16e46c3c629a1e616181dbdfbd7518e