DNS Attacks
Björn Persson
listor3.rombobeorn at tdcpost.se
Fri Jul 25 18:13:10 UTC 2008
Les Mikesell wrote:
> If you are really paranoid (or about to do large transactions on what
> you hope is your banking site), you could do a 'whois' lookup for the
> target domain to find their own name servers and send a query directly
> there for the target site.
Check that the domain name in the address bar is right, that you're using
HTTPS, and that the bank's certificate has been verified correctly. Then
you're safe, unless the attacker has *also* managed to trick one of the
certification authorities into issuing a false certificate, or somehow
sneaked a false CA certificate into your browser.
Similarly for other protocols: Use TLS if the server's identity matters. This
is what TLS is for. (Well, one of its two purposes.)
Björn Persson
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