US Says Iran Hacked Navy Computers

From the WSJ article

"The Pentagon wouldn't confirm the alleged Iranian hacks. A department spokesman said its networks are attacked daily."

"Once the intruders got into the Navy computer system, they were able to exploit security weaknesses to penetrate more deeply into the unclassified network, the officials said"

I have a weird feeling Iran didn't do a damn thing that concluded to hacking "unclassified navy networks"

If the pentagon didn't say so then how is WSJ saying so?

Google link so you can click through the WSJ story (most details at the moment).