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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

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    1. David Redekop‏ @DRtheNerd 10 Oct 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @taviso

      Do you get permission from owners of software before you track down problems? We know you don’t, and there is great value in what you do. If you were made responsible for maintaining the security of an Internet connection, DNS logging would be an essential.

      5 replies 0 retweets 4 likes
    2. David Redekop‏ @DRtheNerd 10 Oct 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @DRtheNerd @taviso

      In fact, when people become aware of the disaster that is third-party ads and tracking, they want their own devices’ DNS logs made visible

      2 replies 0 retweets 2 likes
    3. Tavis Ormandy‏Verified account @taviso 10 Oct 2019
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      Replying to @DRtheNerd

      This is a really terrible take dude 😂

      1 reply 0 retweets 22 likes
    4. Tavis Ormandy‏Verified account @taviso 10 Oct 2019
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      Replying to @taviso @DRtheNerd

      Translation: "Do you ask permission from the author before you read a book? Then why should we ask permission to snoop on DNS. Also, I think users like being snooped on."

      2 replies 0 retweets 12 likes
    5. David Redekop‏ @DRtheNerd 10 Oct 2019
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      Replying to @taviso

      The popularity of actually useful filtering like guardian iOS firewall proves it so, I certainly trade off my own dns visibility if I can stop all connections to doubleclick and the Facebook pixel.

      2 replies 0 retweets 1 like
    6. Will Strafach‏Verified account @chronic 10 Oct 2019
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      Replying to @DRtheNerd @taviso

      I think there is a good middle ground too though where you can utilize DNS analysis to help users, but also, clearly explain the fact that it is being done. this allows the user to determine for themselves that they are cool with it.pic.twitter.com/O51igHBgw6

      1 reply 0 retweets 2 likes
    7. Tavis Ormandy‏Verified account @taviso 10 Oct 2019
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      Replying to @chronic @DRtheNerd

      No, this isn't middle ground, you 100% have permission and are good. The owner installed your app that doesn't obfuscate what it's doing, you're good to go and above reproach.

      2 replies 0 retweets 19 likes
    8. David Redekop‏ @DRtheNerd 10 Oct 2019
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      Replying to @taviso @chronic

      Likewise, internet connection *owners* often choose to filter by DNS. I’m not endorsing ISP and upstream logging, but strictly the usefulness of local blocking for security or content filtering when appropriate for the environment. Libraries, schools, etc.

      3 replies 0 retweets 0 likes
    9. Tavis Ormandy‏Verified account @taviso 10 Oct 2019
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      Replying to @DRtheNerd @chronic

      Nice try, but that's mental gymnastics. You need to get permission.

      1 reply 0 retweets 4 likes
    10. David Redekop‏ @DRtheNerd 10 Oct 2019
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      Replying to @taviso @chronic

      How do you explain your employer offering safe search and YouTube filtering levels *BY DNS* then?

      1 reply 0 retweets 0 likes
      Tavis Ormandy‏Verified account @taviso 10 Oct 2019
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      Replying to @DRtheNerd @chronic

      That's like saying "Did you ask permission to resolve https://twitter.com ? Then why should I ask permission to snoop on queries?" ...because those things are entirely unrelated. You need permission.

      4:21 PM - 10 Oct 2019
      • 4 Likes
      • n DanielMicay Ryan Hurst Damien Miller
      1 reply 0 retweets 4 likes
        1. New conversation
        2. David Redekop‏ @DRtheNerd 10 Oct 2019
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          Replying to @taviso @chronic

          If you’re intentionally confusing issues here, it won’t work with me. Google offers DNS filtering for services. You say permission to use it, must be given by the owner as though everything must be black and white. If so, those two ideals are incompatible.

          1 reply 0 retweets 0 likes
        3. Damien Miller‏ @damienmiller 10 Oct 2019
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          Replying to @DRtheNerd @taviso @chronic

          Pretty sure you're the one who is intentionally confusing unauthorised surveillance with DNS-based service differentiation

          0 replies 0 retweets 11 likes
        4. End of conversation

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