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taviso's profile
Tavis Ormandy
Tavis Ormandy
Tavis Ormandy
Verified account
@taviso

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Tavis OrmandyVerified account

@taviso

Vulnerability researcher at Google. This is a personal stream, opinions expressed are mine.

California
taviso.decsystem.org
Joined April 2008

Tweets

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    1. Arrigo Triulzi‏ @cynicalsecurity 31 Oct 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @taviso @bagder and

      In the EU with the GDPR it would be most unwise to log all DNS requests from customers without reason and without consent. Once the request is then made by the ISP's DNS it is then one amongst a multitude providing privacy. DoH providers are US-based. Bad start…

      1 reply 0 retweets 1 like
    2. Tavis Ormandy‏Verified account @taviso 31 Oct 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @cynicalsecurity @bagder and

      Tavis Ormandy Retweeted Matthew Prince  🌥

      Three things, I'm European and I use encrypted protocols. DoH is just a protocol, you can use it with both nodes in Europe if that makes you happy. Thirdly, see this tweet, major providers already do comply with GPDR and Privacy Shield, so non-issue 😛https://twitter.com/eastdakota/status/1181620950653181952 …

      Tavis Ormandy added,

      Matthew Prince  🌥Verified account @eastdakota
      Replying to @floorter @taviso and 4 others
      That’s correct. We have presence in London (EU for a bit longer) and Lisbon and comply with Privacy Shield and GDPR. Counter intuitively, we have *much* stronger protections against US gov’t requests as a US-based global company. But understand that’s not the general perception.
      2 replies 0 retweets 1 like
    3. Arrigo Triulzi‏ @cynicalsecurity 31 Oct 2019
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      Replying to @taviso @bagder and

      Tavis, please, don't treat me like an idiot… "encrypted protocol" because the issue with DNS is that they sniff the link between you and the ISP so you exchange it for giving a single party all your DNS traffic in a nice identifiable way? Encryption to surrender privacy…

      2 replies 0 retweets 1 like
    4. Arrigo Triulzi‏ @cynicalsecurity 31 Oct 2019
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      Replying to @cynicalsecurity @taviso and

      So you are telling me that DNS running to my local router aggregating all the users in my house (and caching answers keeping them "in house", then off to the ISP which again caches and aggregates is worse than a direct link to a unique DNS?

      1 reply 0 retweets 0 likes
    5. Arrigo Triulzi‏ @cynicalsecurity 31 Oct 2019
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      Replying to @cynicalsecurity @taviso and

      Not to mention the interesting issue if suddenly they go bust / have a major BGP failure or some nation decides to drop peering with them. Single point of failure.

      1 reply 0 retweets 1 like
    6. Tavis Ormandy‏Verified account @taviso 31 Oct 2019
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      Replying to @cynicalsecurity @bagder and

      Your ISP is a SPOF, what if they go bust or have a major BGP failure? DoH doesn't change the status quo here.

      1 reply 0 retweets 0 likes
    7. Arrigo Triulzi‏ @cynicalsecurity 31 Oct 2019
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      Replying to @taviso @bagder and

      ISPs go bust and you get a new line… do you go and change the config for all the Firefox installs? I've seen fewer BGP failures than technical collapses at cloud providers to be honest and I've been speaking BGP for 30 yrs now… Look, peace, we disagree, that's it.

      2 replies 0 retweets 0 likes
    8. Tavis Ormandy‏Verified account @taviso 31 Oct 2019
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      Replying to @cynicalsecurity @bagder and

      Wait, you're talking about Firefox? How is your mum getting this in Italy, I thought Firefox only enabled it in US? https://support.mozilla.org/en-US/kb/dns-over-https-doh-faqs#w_are-you-rolling-this-default-out-in-europe …

      1 reply 0 retweets 0 likes
    9. Arrigo Triulzi‏ @cynicalsecurity 31 Oct 2019
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      Replying to @taviso @bagder and

      Geolocation? It definitely had it and she did install the US version.

      1 reply 0 retweets 0 likes
    10. Raito Bezarius‏ @Ra1t0_Bezar1us 31 Oct 2019
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      Replying to @cynicalsecurity @taviso and

      Furthermore, if the problem was a speed issue, it's a bit FF who should have added a heuristic to measure speed impact of DoH and disable it if it's not fast enough, but it does not seem like it was done:https://github.com/mozilla/doh-rollout/blob/master/src/heuristics.js …

      1 reply 0 retweets 0 likes
      Tavis Ormandy‏Verified account @taviso 31 Oct 2019
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      Replying to @Ra1t0_Bezar1us @cynicalsecurity and

      Fair. They're already falling back on error, so it seems reasonable to also fall back if queries are too slow, if they're not already doing that they probably should. Hopefully in a few years it won't be necessary.

      6:34 PM - 31 Oct 2019
      0 replies 0 retweets 0 likes

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