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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. Tavis Ormandy‏Verified account @taviso May 25
      • Report Tweet
      • Report NetzDG Violation
      Replying to @tgenov @mik235 and

      Then how are you going to verify the build reproduces?

      1 reply 0 retweets 0 likes
    2. Todor Genov‏ @tgenov May 25
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      Replying to @taviso @mik235 and

      I'll verify it on 1 host. Verify the binary checksum. Use the binary on the other 100.

      1 reply 0 retweets 1 like
    3. Tavis Ormandy‏Verified account @taviso May 25
      • Report Tweet
      • Report NetzDG Violation
      Replying to @tgenov @mik235 and

      You said you don't "have an in-house build". So I guess you do now, then why can't you distribute that build? That doesn't require reproducible builds, and has the same security benefits.

      2 replies 0 retweets 1 like
    4. Todor Genov‏ @tgenov May 25
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      Replying to @taviso @mik235 and

      I said I don't have an in-house build/package/deploy system. I didn't say I don't have a build system.

      1 reply 0 retweets 1 like
    5. Tavis Ormandy‏Verified account @taviso May 25
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      Replying to @tgenov @mik235 and

      Which part don't you have? The packaging is one more command, no?

      1 reply 0 retweets 0 likes
    6. Todor Genov‏ @tgenov May 25
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      Replying to @taviso @mik235 and

      The part where I would have to re-invent the package distribution wheel.

      1 reply 0 retweets 1 like
    7. Tavis Ormandy‏Verified account @taviso May 25
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      Replying to @tgenov @mik235 and

      You do want to reinvent the building wheel though right? The packaging is trivial, and the distribution isn't difficult: You already have to stage official packages while you build and verify them, no?

      1 reply 1 retweet 0 likes
    8. Todor Genov‏ @tgenov May 25
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      Replying to @taviso @mik235 and

      I reproduce the build once. Checksum passes. I deploy the binary (that I now trust) 1000 times using existing distribution channels. Easy is more expensive than free.

      1 reply 0 retweets 0 likes
    9. Tavis Ormandy‏Verified account @taviso May 25
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      Replying to @tgenov @mik235 and

      Yes, agreed. So at the moment, you reproduce the build once, verify the checksum, then deploy the official binary. I'm saying, build it once, then deploy *your* binary. Where is the flaw in that system? You must already be able to run a command on every system, right?

      1 reply 0 retweets 0 likes
    10. Todor Genov‏ @tgenov May 25
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      Replying to @taviso @mik235 and

      I don't have a delivery mechanism for *MY* binary. I don't want to build it - it already exists.

      1 reply 0 retweets 0 likes
      Tavis Ormandy‏Verified account @taviso May 25
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      Replying to @tgenov @mik235 and

      Can you run a command on every system?

      4:57 PM - 25 May 2020
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Todor Genov‏ @tgenov May 25
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          Replying to @taviso @mik235 and

          It's my infrastructure - In theory I can build anything to do anything. I don't want to.

          1 reply 0 retweets 0 likes
        3. Tavis Ormandy‏Verified account @taviso May 25
          • Report Tweet
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          Replying to @tgenov @mik235 and

          If I understand correctly, you are seriously concerned your vendors build server is compromised. You're concerned enough that you're willing to rebuild every package manually, but you draw the line at copying files around? Do you at least agree it's not a *strong* argument?

          2 replies 0 retweets 0 likes
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