1.1.4 Ensure nosuid option set on /tmp partition

Information

The nosuid mount option specifies that the filesystem cannot contain setuid files.

Rationale:

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/3148

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6, CSCv6|3.1, CSCv7|5.1

Plugin: Unix

Control ID: d23b07470e5a57322f7c75ef4fc016ac4a033130ad511608250890fddf76f8fa