1.1.9 Ensure nosuid option set on /var/tmp partition

Information

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

Rationale:

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

Solution

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

# mount -o remount,nosuid /var/tmp

See Also

https://workbench.cisecurity.org/files/3152

Item Details

Category: CONFIGURATION MANAGEMENT

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

Plugin: Unix

Control ID: 49508dc81dd1ec07a27bc4f0b31fd8fc64e805071db19896eb3ccae34847648e