Passwords reset after breach of Navy-Marine Corps network

A recent breach of the Navy Marine Corps Intranet did not jeopardize personal or organizational information, but required some passwords to be changed, according to a Navy spokesman.

Passwords for certain users on the unclassified portion of the NMCI network were reset as part of a "prudent network security response" to an intrusion by an unauthorized user, said Lt. Cmdr. Ron Steiner, a public affairs officer for the Naval Network Warfare Command in Norfolk, Va. There is a separate classified NMCI network that was not affected by this incident.

The network intrusion occurred around Oct. 20 on a legacy server that was not properly configured, Steiner said.

"Based upon that, they found it prudent that we should take the extra precaution and change . . . [the] passwords," Steiner said. "In our opinion, the system worked as we expected it to."

Because the Navy was able to track and see where the intruder went inside the system, officials are confident that "there was no big compromise of any information," Steiner said.

The ports used by the unauthorized intruder have since been blocked and taken offline, Steiner said. If the intruder is caught, the case will be handed over to Naval Criminal Investigative Service, he added.

The breach also didn't affect the IT 21 networking system, which serves the Navy's ships, and the overseas network ONE-NET, according to a message sent to NMCI users last month.