We just had some spam sent via our webmail. Turns out we had an account with a blank password but the shell set to /sbin/nologin (RedHat Linux). The webmail client was able to login with random passwords. This seems to be true logging in with Alpine also - random passwords work, but blank ones do not.

I suspect that this is standard Linux behaviour and stupidity on our part. However, the ability to login with random passwords that are not checked is a bit bizarre.


--
Andrew Daviel, TRIUMF, Canada
Tel. +1 (604) 222-7376  (Pacific Time)
Network Security Manager
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