full-disclosure - Re: NO-IP service Flaw

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Message-ID: <21065.1233075471@turing-police.cc.vt.edu>
Date: Tue, 27 Jan 2009 11:57:51 -0500
From: Valdis.Kletnieks@...edu
To: infolookup@...il.com
Cc: full-disclosure@...ts.grok.org.uk, Tribal MP <tribalmp@...il.com>,
	full-disclosure-bounces@...ts.grok.org.uk
Subject: Re: NO-IP service Flaw

On Tue, 27 Jan 2009 00:41:59 GMT, infolookup@...il.com said:
> What if you are sniffing the traffic for any http session the information is 
> submitted in clear text.

If you're traffic sniffing, you'll see the data whether it's GET or POST.
The distinction becomes important for things like http proxies and things
that log/remember URLs - it's somewhat bad form to leave a userid/password
sitting right there in the browser 'recent URLS' list or in a logfile someplace.

If you're passing the data in the URL, at best it can be obfuscated and
reversed fairly easily (unless you've got enough Javascript to pop open a
dialog window and use an entered value as a salt for encrypting before
transmission).

Yes, the proper thing to do here is a POST over https.

Personally, I'm surprised that a frikking *domain registrar* is that clueless
about basic security (the *biggest* issue in what would otherwise be a pretty
minor vulnerability).

Or maybe I'm not, actually..  I wonder what *else* they got wrong?

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