LeftHand OS (aka SAN iQ) 10.5 and earlier on HP StoreVirtual Storage devices does not provide a mechanism for disabling the HP Support challenge-response root-login feature, which makes it easier for remote attackers to obtain administrative access by leveraging knowledge of an unused one-time password.
https://h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c03825537
http://www.theregister.co.uk/2013/07/09/hp_storage_more_possible_backdoors/