Re: How is this WPAD redirect even a "hack"?

["McGean, Joseph" <joseph.mcgean () i-Deal com>]

Dave,

Okay I will check the logs.


Joe
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-----Original Message-----
From: dailydave-bounces () lists immunitysec com <dailydave-bounces () lists immunitysec com>
To: Thomas W Shinder <tshinder () tacteam net>
CC: dailydave () lists immunitysec com <dailydave () lists immunitysec com>
Sent: Tue Mar 27 11:08:48 2007
Subject: Re: [Dailydave] How is this WPAD redirect even a "hack"?

Thomas W Shinder wrote:
> DDNS will still work on non-domain computers if you set the DDNS to
> accept unsecure connections (ie, machines that are not domain members).

Unfortunately, Secure Dynamic DNS Updates being disabled is all too 
common; as you point out, if it is, non-domain computers can 
update/create DNS records, and this attack is even more trivial to execute.

Note carefully, though, that the attack *is* still valid even if Secure 
DDNS updates are enabled. The only way to mitigate this through DNS 
would be to create a record that authenticated DNS users didn't have 
permission to update or delete.

As an aside, I've had an offlist e-mail from a contributor wishing to 
remain nameless pointing out a related post on Full Disclosure a few 
days ago, which draws attention to the attack vectors associated with 
Secure DDNS being disabled:

http://archives.neohapsis.com/archives/fulldisclosure/2007-03/0335.html

  - James.

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