http://www.oracle.com/us/products/database/exadata/overview/index.html

The oracle engineered solution contains two leaf switches and in larger installations a spine switch.  The installation I worked with didn't
have a spine switch, but the two leaf switches were configured with three logins with easily guessable passwords and a shadow file
that was world readable.

There are three accounts with easily guessable default passwords on the 
exadata inifiniband switches:

ilom-admin,ilom-operator and nm2user.
rux0r:~ meep0$ ssh ilom-admin@192.168.0.113 "cat /conf/shadow"

The shadow file is world readable:

[root@exad-1swib2 ~]# ls -l /conf/shadow
-rw-r--r-- 1 root root 749 Dec 23  2011 /conf/shadow


Vendor: notified 3/12/2012