Root shell bug on Debian wheezy

[frank.jansen@actrix.co.nz]

Greetings,

A root shell sometimes appears during the login sequence on a Debian
Wheezy system servicing thin clients. The root shell appears after one
enters a login and a password then presses random keys until a box appears
with the root prompt and perhaps the rest of the login window.

A "whoami" has output "root". A "hostname" shows "ltsp38". The linux
running appears to be that on the thin client and not the server. The
filesystem shown is not that of the server and looks like what should be
on the thin client.

Doing a "shutdown" shuts down the client and nothing else. Can't create a
directory in /etc but can output a file in to /home. The file in /home is
gone after the next login.

This is a bug, what should be done to deal with it ?
Thanks in advance.

frank.jansen@actrix.gen.nz, ZL2TTS