Spoofing ASNs (Re: SNMP DDoS: the vulnerability you might not know you have)

Florian Weimer fw at deneb.enyo.de
Sun Aug 11 16:14:28 UTC 2013


* Christopher Morrow:

> On Sun, Aug 11, 2013 at 11:40 AM, Florian Weimer <fw at deneb.enyo.de> wrote:
>
>> Apparently, they're implementing DNS proxy by destination-NATting, and
>> because they listen also on the WAN interface, they get the source
>> address wrong.
>>
>> This is quite scary.
>
> which part? the fact that most NAT implementations on CPE are crap? or
> the spoofing bit?

The spoofing bit.  Among other things, it makes the impact of CPE
crappiness non-localized.



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