1.1.14 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/2925

Item Details

Category: CONFIGURATION MANAGEMENT, SYSTEM AND COMMUNICATIONS PROTECTION

References: 800-53|CM-6, 800-53|SC-7(10), CSCv7|5.1, CSCv7|13

Plugin: Unix

Control ID: 7225e7fc53521b4916458a054966905d8e1c26367f61f4be0e1a05c7690352b0