1.1.13 Ensure /var/tmp partition includes the nosuid option

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,nodev,noexec /var/tmp

See Also

https://workbench.cisecurity.org/files/3219

Item Details

Category: CONFIGURATION MANAGEMENT

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

Plugin: Unix

Control ID: 21c82a80ecde64f551d9d566a236f9334fca42fda53176ada105172d6a2dc7ce