Every branch of service and Commands within have a guidance policy on dealing with media inquiries. The policy is to refer them to the Public Affairs people. The "unnamed military officials" cited in the article disobeyed a lawful order. That's an Article 92 violation.
Given that, what makes you think this revelation was not pre-approved by the higher ups in the Pentagon?
I will bet that no action is ever taken against these "leakers," because the military wants this information to be out there.