[dns-operations] DNS Attack over UDP fragmentation

Mike Hoskins (michoski) michoski at cisco.com
Wed Sep 4 15:38:00 UTC 2013

-----Original Message-----

From: Dan York <york at isoc.org>
Date: Wednesday, September 4, 2013 11:03 AM
To: Ondřej Surý <ondrej.sury at nic.cz>, DNS Operations
<dns-operations at lists.dns-oarc.net>
Subject: Re: [dns-operations] DNS Attack over UDP fragmentation

>On 9/4/13 9:08 AM, "Ondřej Surý" <ondrej.sury at nic.cz> wrote:
>>We gave it some thoughts here at CZ.NIC Labs and we think that the threat
>>is real and we are now trying to write a PoC code to prove the
>>theoretical concept.
>>So what are the views of other people on this list?
>I attended the SAAG session, listened to the presentation and read through
>the materials with great interest. I left, though, not really sure I could
>understand how real of a threat this is in actual deployments.   I would
>certainly welcome PoC code that could help shed light on the severity of
>the issue.

Interesting indeed.  In reality, everyone should be thinking hard about
remediation at all levels right now (protocol enhancements are great, but
take time you won't have once a PoC exists).  If the vector has been
described, it's safe to assume people with more time and money are already
working on the PoC, and won't be sharing it.

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