1.1.2.4 Ensure nosuid option set on /tmp partition

Audit

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 --kernel /tmp | grep nosuid
/tmp tmpfs tmpfs rw,nosuid,nodev,noexec,relatime,seclabel

Remediation

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