Major remote SSH security issue in CoreOS Linux Alpha

Should you happen to be running a CoreOS alpha release in an exposedsetting, you'll want to have a look at thisadvisory and do a quick upgrade. "A misconfiguration in the PAMsubsystem in CoreOS Linux Alpha 1045.0.0 and 1047.0.0 allowed unauthorizedusers to gain access to accounts without a password or any otherauthentication token being required. This vulnerability affects a subset ofmachines running CoreOS Linux Alpha. Machines running CoreOS Linux Beta orStable releases are unaffected."