Re: extra dot on domain name gives different site

[Javier Fernandez-Sanguino <jfernandez () germinus com>]

Robin Wood dijo:
> I didn't realise that an extra dot on the end was a valid domainname
> until this. It is definitely an extra check I'll be making on my
> audits from now on.

Actually, the real domainname ends with a 'dot' (which is DNS' root, 
equivalent to a filename's, in UNIX, first '/'). The fact is, most 
DNS-based applications will assume that 'xxxx.yy' is equivalent to 
'xxxx.yy.' (i.e. yy is a valid subdomain of the DNS root zone)

You seem to have found a misconfiguration issue in that webserver. 
Probably, if you craft an HTTP request with an invalid Host: header you 
will get a similar result.

Regards

Javier


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