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1.1.2.1.3 Ensure nosuid option set on /tmp partition

Audit#

- IF - a separate partition exists for /tmp, verify that the nosuid option is set for the /tmp mount. Run the following command to verify that the nosuid mount option is set. Example: 

# findmnt -kn /tmp | grep -v nosuid
Nothing should be returned

Remediation#

- IF - a separate partition exists for /tmp. Edit the /etc/fstab file and add nosuid to the fourth field (mounting options) for the /tmp partition. Example: 

<device> /tmp <fstype> defaults,rw,nosuid,nodev,noexec,relatime 0 0
Run the following command to remount /tmp with the configured options: 
# mount -o remount /tmp