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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. 360 Netlab‏ @360Netlab 7 Jul 2019
      • Report Tweet
      • Report NetzDG Violation

      360 Netlab Retweeted Daniel Stenberg

      It is DoH, see the attached original DNS over HTTPS request in the decrypted until.PNG file. In the blog We used mitmproxy to hijack and decrypt the HTTPS session when we showcased our finding so it is easier for readers to follow, maybe that caused confusion.https://twitter.com/bagder/status/1146740062127886338 …

      360 Netlab added,

      Daniel StenbergVerified account @bagder
      This is not DoH, it sends a HTTP POST to a web site that returns the IP of the host name in a parse-friendly format. https://twitter.com/jedisct1/status/1146724289472880640 …
      2 replies 2 retweets 7 likes
      Show this thread
    2. Daniel Stenberg‏Verified account @bagder 8 Jul 2019
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      Replying to @360Netlab

      No, it is a https post all right, but not rfc8484 DoH.

      2 replies 0 retweets 9 likes
    3. 360 Netlab‏ @360Netlab 8 Jul 2019
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      Replying to @bagder

      It‘s not uncommon for an implementation to not strictly follow RFC, here the attacker utilizes cloudflare’ DoH. As can be seen from the screenshots from the previous thread.

      1 reply 0 retweets 2 likes
    4. Daniel Stenberg‏Verified account @bagder 8 Jul 2019
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      Replying to @360Netlab

      Which is why I clarified that it wasn't the standard we know as DoH!

      1 reply 0 retweets 2 likes
    5. Kevin Beaumont‏Verified account @GossiTheDog 8 Jul 2019
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      Replying to @bagder @360Netlab

      You said it is not DoH, but it, well, is..

      2 replies 0 retweets 1 like
      Tavis Ormandy‏Verified account @taviso 8 Jul 2019
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      Replying to @GossiTheDog @bagder @360Netlab

      Your opinion is that if it resolves a domain using HTTPS, then it's DoH? Like any cgi script that does gethostbyname(param) and outputs JSON is DoH?

      8:36 AM - 8 Jul 2019
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Kevin Beaumont‏Verified account @GossiTheDog 8 Jul 2019
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          Replying to @taviso @bagder @360Netlab

          If it looks like this and is using a DoH resolver then.. it’s close enough for me to shorthand it as DoH.pic.twitter.com/FYZ0fX2UgW

          2 replies 0 retweets 8 likes
        3. Tavis Ormandy‏Verified account @taviso 8 Jul 2019
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          Replying to @GossiTheDog @bagder @360Netlab

          I see, I misunderstood the argument. I agree it's okay to refer to that as DoH.

          0 replies 0 retweets 7 likes
        4. End of conversation

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