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/2420

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6, CSCv6|13, CSCv7|5.1

Plugin: Unix

Control ID: 9daba0fc36d5b8cb968cb4a774b454ac36b90eb5cf5ddc1f1ac71ee326d8618e