By the process of deduction one has only to ask which government agency has access to such secrets (CIA) and which bureaucracy/agency has a recent record of undermining the President (CIA). Then ask which agency/bureaucracy is really pissed off because it's being reorganized to try to make it loyal to the country once again instead of pursuing its own sometimes anti-American political ends (CIA). Frankly, if I were Porter Goss I'd have a few of my trusted people keep track of my present and former CIA agents' contacts with Sly Hersch. Two birds with one stone.
Well .. I think your guess is very astute. I guess when I think of anything military I always assume it's the Pentagon .. but I forget the CIA does that stuff too.