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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. Tavis Ormandy‏Verified account @taviso May 25
      • Report Tweet
      • Report NetzDG Violation
      Replying to @dEnergy_dTime @RichFelker and

      See, these are the arbitrary restrictions. What system is this where they can't use the binary from you? Give me a *specific* example, don't just make one up that *could* exist.

      1 reply 0 retweets 0 likes
    2. Marcus Müller‏ @dEnergy_dTime May 25
      • Report Tweet
      • Report NetzDG Violation
      Replying to @taviso @RichFelker and

      I also already did that. Signal app: I might trust @matthew_d_green that he actually looked at the code (his face is even on their website, you know). I sure as hell don't want Matthew to become upstream of signal just because he is *someone I trust*.

      1 reply 0 retweets 3 likes
    3. Tavis Ormandy‏Verified account @taviso May 25
      • Report Tweet
      • Report NetzDG Violation
      Replying to @dEnergy_dTime @RichFelker and

      Specccifics. Matthew can totally give you an app to install, so that doesn't work, you need to add more restrictions.

      1 reply 0 retweets 0 likes
    4. Marcus Müller‏ @dEnergy_dTime May 25
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      Replying to @taviso @RichFelker and

      no, he can't give an app to the world and install it. That would a) potentially breach license b) totally overwhelm his serving capacity c) totally miss the point of not having end users use anything but the vendor app store.

      1 reply 0 retweets 1 like
    5. Marcus Müller‏ @dEnergy_dTime May 25
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      Replying to @dEnergy_dTime @taviso and

      you are the only one here proposing that people sideload software onto their phone, which for the very vast majority indeed would be a terrible idea. Both in usability and in security.

      1 reply 0 retweets 1 like
    6. Tavis Ormandy‏Verified account @taviso May 25
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      • Report NetzDG Violation
      Replying to @dEnergy_dTime @RichFelker and

      No, I don't think trusted vendors with compromised build infrastructure is a problem worth solving. You're proposing everyone use adb to sideload binaries, how else will you verify them first?

      4 replies 0 retweets 1 like
    7. halvarflake‏ @halvarflake May 25
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      Replying to @taviso @dEnergy_dTime and

      so i would disagree on this at least for me personally. i would def like to be able to rebuild debian packages deterministically from source & check that they are identical with public versions.

      2 replies 1 retweet 11 likes
    8. halvarflake‏ @halvarflake May 25
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      Replying to @halvarflake @taviso and

      (i missed 95% of the discussion and am just randomly tseeting personal preferences at this point)

      1 reply 0 retweets 3 likes
    9. Tavis Ormandy‏Verified account @taviso May 25
      • Report Tweet
      • Report NetzDG Violation
      Replying to @halvarflake @dEnergy_dTime and

      Yes but *why*? You're already building them and you already trust the developer, why does it matter? It seems like just being open source is enough.

      3 replies 0 retweets 0 likes
    10. Rich Felker‏ @RichFelker May 25
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      Replying to @taviso @halvarflake and

      Because we care about community not just own self-interest. If there's a discrepancy it means something is wrong and needs investigation.

      1 reply 0 retweets 2 likes
      Tavis Ormandy‏Verified account @taviso May 25
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      Replying to @RichFelker @halvarflake and

      I see, so when you said vendors are all terrible license violators, and if you force them to produce reproducible builds you might be able to catch them, you actually meant you care about their users? 😛 Then why the focus on build infra, and nothing else?

      1:50 PM - 25 May 2020
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Rich Felker‏ @RichFelker May 25
          • Report Tweet
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          Replying to @taviso @halvarflake and

          As I said at the time, I don't care so much about the copyright infringement as the unsafety that results from vulnerable code they didn't disclose.

          1 reply 0 retweets 0 likes
        3. Markus Vervier‏ @marver May 25
          • Report Tweet
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          Replying to @RichFelker @taviso and

          Wait do you mean the purpose of reproducible builds is actually to force vendors to disclosure their source code and they do not really carry a security benefit by themselves?

          1 reply 0 retweets 2 likes
        4. 2 more replies

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