This is nothing new to spam filtering. Any dynamic/proactive filter mechanism is subject to the sam shenanigans.

This has been a "feature" of IntrusionPreventionSystems since they came out. Spoof an attack from an IP you want to be denied, and the IDS updates the ruleset on the firewall (what a IPS really is, an IDS talking to a firewall) and that third party can't get past that perimeter.

bburge
someguy who does this kinda stuff

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On 6/17/2004 at 7:27 PM Joel Eriksson wrote:

>On Wed, Jun 16, 2004 at 01:26:28PM +0200, R Armiento wrote:
>[snip]
>> For example: attacker 'A' sends 'B' a social engineering request
>> for "the secret plans" and says "if you are unsure, forward my
>> request to your boss and ask if this is okay". 'B' forwards the
>> email to his boss 'C' and asks "Is this okay?". However, 'C':s
>> spam filter silently drops the email. 'A' forges a reply from
>> 'C' saying: "Sure, no problem, go ahead."
>
>Many will probably discard the above as farfetched or ignore it
>since it's not a "real" vulnerability that gives remote root to
>the attacker, I think it's beautiful though. :)
>
>Security is a state of mind, a way of thinking. Vulnerabilities
>are all around us and the one you point out above is certainly
>one of them.
>
>> Regards,
>> R. Armiento
>
>--
>Best Regards,
> Joel Eriksson
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