Re: [Add] fixing coffee shop brokenness with DoH
Eric Rescorla <ekr@rtfm.com> Wed, 24 July 2019 18:38 UTC
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From: Eric Rescorla <ekr@rtfm.com>
Date: Wed, 24 Jul 2019 11:37:25 -0700
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To: Michael Richardson <mcr+ietf@sandelman.ca>
Cc: "add@ietf.org" <add@ietf.org>
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Subject: Re: [Add] fixing coffee shop brokenness with DoH
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On Wed, Jul 24, 2019 at 11:18 AM Michael Richardson <mcr+ietf@sandelman.ca> wrote: > > Eric Rescorla <ekr@rtfm.com> wrote: > > In the case where A is not DNSSEC signed, the attacker just sends > > NXDOMAIN, > > which the client accepts and refuses to connect. > > > In the case where A *is* DNSSEC signed, the attacker can also inject > an > > NXDOMAIN. DNSSEC of course won't validate, but the client still > doesn't > > have an IP address to connect to, so it's only recourse is to error > > out. Now, it can show the user a different error than it did for > > NXDOMAIN, but these errors tend to be fairly generic anyway (Firefox, > > for instance, shows "Hmm. We’re having trouble finding that site."), > > so from the user perspective these > > aren't really very different. > > This needs to be an on-path attacker who can not only inject a fake > NXDOMAIN, > but also suppress/delete the legitimate answers. > Yes. > This means it is the "coffee" shop that is doing the attack. > When the coffee shop is a soveign country, then there are many things that > they can also do which DoH/DoT may or not help with. > Sure. When this is an off-path attacker, DNSSEC enables successful connections > (that HTTPS can validate) vs "Having trouble" dialogues. > Yes. However, DoH/TRR also prevents these attacks. -Ekr > > -- > ] Never tell me the odds! | ipv6 mesh > networks [ > ] Michael Richardson, Sandelman Software Works | network > architect [ > ] mcr@sandelman.ca http://www.sandelman.ca/ | ruby on > rails [ > > > -- > Add mailing list > Add@ietf.org > https://www.ietf.org/mailman/listinfo/add >
- [Add] meeting hum: should the IETF take up this w… Rob Sayre
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- Re: [Add] meeting hum: should the IETF take up th… Rob Sayre
- Re: [Add] meeting hum: should the IETF take up th… Michael Sinatra
- Re: [Add] meeting hum: should the IETF take up th… Tommy Jensen
- Re: [Add] meeting hum: should the IETF take up th… Jim Reid
- Re: [Add] meeting hum: should the IETF take up th… STARK, BARBARA H
- Re: [Add] meeting hum: should the IETF take up th… Rob Sayre
- Re: [Add] meeting hum: should the IETF take up th… Michael Richardson
- Re: [Add] meeting hum: should the IETF take up th… Reed, Jon
- Re: [Add] meeting hum: should the IETF take up th… Rob Sayre
- [Add] fixing coffee shop brokenness with DoH Jim Reid
- Re: [Add] meeting hum: should the IETF take up th… Bret Jordan
- Re: [Add] fixing coffee shop brokenness with DoH Rob Sayre
- Re: [Add] meeting hum: should the IETF take up th… Rob Sayre
- Re: [Add] fixing coffee shop brokenness with DoH Bret Jordan
- Re: [Add] fixing coffee shop brokenness with DoH Rob Sayre
- Re: [Add] fixing coffee shop brokenness with DoH Tommy Jensen
- Re: [Add] fixing coffee shop brokenness with DoH Rob Sayre
- Re: [Add] fixing coffee shop brokenness with DoH Tommy Jensen
- Re: [Add] fixing coffee shop brokenness with DoH Rob Sayre
- Re: [Add] fixing coffee shop brokenness with DoH Tommy Jensen
- Re: [Add] fixing coffee shop brokenness with DoH Bret Jordan
- Re: [Add] fixing coffee shop brokenness with DoH Rob Sayre
- Re: [Add] fixing coffee shop brokenness with DoH Alec Muffett
- Re: [Add] fixing coffee shop brokenness with DoH sthaug
- Re: [Add] fixing coffee shop brokenness with DoH Rob Sayre
- Re: [Add] meeting hum: should the IETF take up th… Brett Carr
- Re: [Add] fixing coffee shop brokenness with DoH Joseph Lorenzo Hall
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- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Ted Lemon
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- Re: [Add] fixing coffee shop brokenness with DoH Joseph Lorenzo Hall
- Re: [Add] fixing coffee shop brokenness with DoH Bret Jordan
- Re: [Add] fixing coffee shop brokenness with DoH Joseph Lorenzo Hall
- Re: [Add] fixing coffee shop brokenness with DoH chris.box
- Re: [Add] fixing coffee shop brokenness with DoH Vittorio Bertola
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Vittorio Bertola
- Re: [Add] meeting hum: should the IETF take up th… Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Ted Lemon
- Re: [Add] fixing coffee shop brokenness with DoH Joseph Lorenzo Hall
- Re: [Add] fixing coffee shop brokenness with DoH Ted Lemon
- Re: [Add] fixing coffee shop brokenness with DoH Jim Reid
- Re: [Add] fixing coffee shop brokenness with DoH Diego R. Lopez
- Re: [Add] fixing coffee shop brokenness with DoH Brian Dickson
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Ted Lemon
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Tony Finch
- [Add] Trust and control on the Internet (was Re: … Vittorio Bertola
- Re: [Add] fixing coffee shop brokenness with DoH Jim Reid
- Re: [Add] Trust and control on the Internet (was … Ted Lemon
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Ted Lemon
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Ted Lemon
- Re: [Add] fixing coffee shop brokenness with DoH Jim Reid
- Re: [Add] fixing coffee shop brokenness with DoH Jim Reid
- Re: [Add] meeting hum: should the IETF take up th… Stephane Bortzmeyer
- Re: [Add] meeting hum: should the IETF take up th… Stephane Bortzmeyer
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Stephane Bortzmeyer
- Re: [Add] fixing coffee shop brokenness with DoH Brian Dickson
- Re: [Add] fixing coffee shop brokenness with DoH Ted Lemon
- Re: [Add] Trust and control on the Internet (was … Andrew Campling
- Re: [Add] Trust and control on the Internet (was … Andrew Campling
- Re: [Add] fixing coffee shop brokenness with DoH Brian Dickson
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Brian Dickson
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Jim Reid
- Re: [Add] fixing coffee shop brokenness with DoH Michael Richardson
- Re: [Add] fixing coffee shop brokenness with DoH Ted Lemon
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Ted Lemon
- Re: [Add] fixing coffee shop brokenness with DoH Jim Reid
- Re: [Add] fixing coffee shop brokenness with DoH Michael Richardson
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Stephane Bortzmeyer
- Re: [Add] fixing coffee shop brokenness with DoH Stephane Bortzmeyer
- Re: [Add] fixing coffee shop brokenness with DoH Stephane Bortzmeyer
- Re: [Add] fixing coffee shop brokenness with DoH Jim Reid
- Re: [Add] fixing coffee shop brokenness with DoH Rob Sayre
- Re: [Add] fixing coffee shop brokenness with DoH Brian Dickson
- Re: [Add] fixing coffee shop brokenness with DoH Rob Sayre
- Re: [Add] fixing coffee shop brokenness with DoH chris.box
- Re: [Add] fixing coffee shop brokenness with DoH Jim Reid
- Re: [Add] fixing coffee shop brokenness with DoH Rob Sayre
- Re: [Add] fixing coffee shop brokenness with DoH Petr Špaček
- Re: [Add] meeting hum: should the IETF take up th… Neil Cook
- Re: [Add] fixing coffee shop brokenness with DoH Normen Kowalewski
- Re: [Add] fixing coffee shop brokenness with DoH Joe Abley
- Re: [Add] fixing coffee shop brokenness with DoH Normen Kowalewski
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Paul Ebersman
- Re: [Add] fixing coffee shop brokenness with DoH Jim Reid
- Re: [Add] fixing coffee shop brokenness with DoH Petr Špaček
- Re: [Add] meeting hum: should the IETF take up th… Adam Roach
- Re: [Add] meeting hum: should the IETF take up th… Neil Cook
- Re: [Add] fixing coffee shop brokenness with DoH Paul Ebersman
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] fixing coffee shop brokenness with DoH Paul Ebersman
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Vittorio Bertola
- Re: [Add] fixing coffee shop brokenness with DoH Paul Wouters
- Re: [Add] fixing coffee shop brokenness with DoH Michael Richardson
- Re: [Add] fixing coffee shop brokenness with DoH Brian Dickson
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Andrew Campling
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Adam Roach
- Re: [Add] meeting hum: should the IETF take up th… Stephen Farrell
- Re: [Add] meeting hum: should the IETF take up th… Adam Roach
- Re: [Add] fixing coffee shop brokenness with DoH Andrew Campling
- Re: [Add] fixing coffee shop brokenness with DoH Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Andrew Campling
- Re: [Add] meeting hum: should the IETF take up th… Vittorio Bertola
- Re: [Add] meeting hum: should the IETF take up th… Michael Richardson
- Re: [Add] meeting hum: should the IETF take up th… Ben Schwartz
- Re: [Add] meeting hum: should the IETF take up th… Rob Sayre
- Re: [Add] meeting hum: should the IETF take up th… Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Michael Richardson
- Re: [Add] meeting hum: should the IETF take up th… Michael Richardson
- Re: [Add] meeting hum: should the IETF take up th… Stephen Farrell
- Re: [Add] meeting hum: should the IETF take up th… Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Rob Sayre
- Re: [Add] meeting hum: should the IETF take up th… Stephen Farrell
- Re: [Add] meeting hum: should the IETF take up th… Rob Sayre
- Re: [Add] meeting hum: should the IETF take up th… Michael Richardson
- Re: [Add] meeting hum: should the IETF take up th… Vittorio Bertola
- Re: [Add] meeting hum: should the IETF take up th… Valentin Gosu
- Re: [Add] meeting hum: should the IETF take up th… Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Livingood, Jason
- Re: [Add] meeting hum: should the IETF take up th… Paul Ebersman
- Re: [Add] meeting hum: should the IETF take up th… Rob Sayre
- Re: [Add] meeting hum: should the IETF take up th… Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Diego R. Lopez
- Re: [Add] meeting hum: should the IETF take up th… Eric Rescorla
- Re: [Add] meeting hum: should the IETF take up th… Eric Orth
- Re: [Add] meeting hum: should the IETF take up th… Diego R. Lopez
- Re: [Add] meeting hum: should the IETF take up th… Thomas Peterson
- Re: [Add] meeting hum: should the IETF take up th… Jim Reid
- Re: [Add] meeting hum: should the IETF take up th… Livingood, Jason
- Re: [Add] meeting hum: should the IETF take up th… Tommy Jensen
- Re: [Add] meeting hum: should the IETF take up th… Ólafur Guðmundsson
- Re: [Add] [EXT] Re: meeting hum: should the IETF … Jacques Latour
- Re: [Add] [EXT] Re: meeting hum: should the IETF … Joe Abley
- Re: [Add] [EXT] Re: meeting hum: should the IETF … Ralf Weber
- [Add] point of deploying DoH in access network (R… 神明達哉
- Re: [Add] point of deploying DoH in access networ… Joe Abley
- Re: [Add] [EXT] Re: meeting hum: should the IETF … Eric Orth
- Re: [Add] [EXT] Re: meeting hum: should the IETF … Christian Huitema
- Re: [Add] [EXT] Re: meeting hum: should the IETF … Mikael Abrahamsson
- Re: [Add] point of deploying DoH in access networ… Tony Finch
- Re: [Add] point of deploying DoH in access networ… Robert Mortimer
- Re: [Add] point of deploying DoH in access networ… Alec Muffett
- Re: [Add] point of deploying DoH in access networ… Ted Lemon
- Re: [Add] point of deploying DoH in access networ… Simon Hicks
- Re: [Add] point of deploying DoH in access networ… Vladimír Čunát