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1.1.2.4.3 Ensure nosuid option set on /var partition

Audit#

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

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

Example: 

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

Remediation#

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

Example: 

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