Senate Democrats hax0red
The Boston Globe has the story:
WASHINGTON -- Republican staff members of the US Senate Judiciary Commitee infiltrated opposition computer files for a year, monitoring secret strategy memos and periodically passing on copies to the media, Senate officials told The Globe.
From the spring of 2002 until at least April 2003, members of the GOP committee staff exploited a computer glitch that allowed them to access restricted Democratic communications without a password.
The actual technical issue involved is apparently one of simple file permissions:
A technician hired by the new judiciary chairman, Patrick Leahy, Democrat of Vermont, apparently made a mistake that allowed anyone to access newly created accounts on a Judiciary Committee server shared by both parties -- even though the accounts were supposed to restrict access only to those with the right password.
However, sharing the same network and servers between the parties, and using those servers to store partisan strategy documents, looks to me like the more fundamental security problem.