discovered that the SSL service on the server did not support the latest TLS 1.2 protocol.

Are you talking about SSL on the management interface, httpd? If so you can update the following items to make audit happy by enabling TLSv1.2 and disabling SSLv3.

tmsh modify sys httpd ssl-protocol 'all -SSLv2 -SSLv3'
tmsh modify sys httpd ssl-ciphersuite 'ECDSA:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4'

Then save the config and restart httpd.

tmsh save sys config
bigstart restart httpd