Major remote SSH security issue in CoreOS Linux Alpha
Should you happen to be running a CoreOS alpha release in an exposed
setting, you'll want to have a look at this
advisory and do a quick upgrade. "A misconfiguration in the PAM
subsystem in CoreOS Linux Alpha 1045.0.0 and 1047.0.0 allowed unauthorized
users to gain access to accounts without a password or any other
authentication token being required. This vulnerability affects a subset of
machines running CoreOS Linux Alpha. Machines running CoreOS Linux Beta or
Stable releases are unaffected."