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1.1.2.5.3 Ensure nosuid option set on /var/tmp partition

Audit#

- IF - a separate partition exists for /var/tmp, verify that the nosuid option is set.

Run the following command to verify that the nosuid mount option is set.

Example: 

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

Remediation#

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

Example: 

<device> /var/tmp   <fstype>    defaults,rw,nosuid,nodev,noexec,relatime    0 0

Run the following command to remount /var/tmp with the configured options: 

# mount -o remount /var/tmp