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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Tavis Ormandy‏Verified account @taviso Aug 22
      Replying to @__b_c @RichFelker

      Sure, it can (depending on if backed by hardware) prevent cookie from being used on another machine...but what attack are you imagining that can't be executed from the compromised machine instead? This is my main sticking point.

      2 replies 0 retweets 2 likes
    2. Brian Campbell‏ @__b_c Aug 22
      Replying to @taviso @RichFelker

      stealing cookie from a workstation left unlocked for a couple minutes while someone gets coffee

      2 replies 0 retweets 0 likes
    3. Tavis Ormandy‏Verified account @taviso Aug 22
      Replying to @__b_c @RichFelker

      Why wouldn't you just install malware? Then you can use the cookie as much as you like. I really feel like there is no good answer to this. The httponly comparison is the best argument I've heard, and it's not super convincing.

      1 reply 0 retweets 1 like
    4. Brian Campbell‏ @__b_c Aug 22
      Replying to @taviso @RichFelker

      to me installing malware is a higher bar than stealing a cookie. more premeditated than opportunistic. but maybe that's naive

      1 reply 0 retweets 0 likes
    5. Tavis Ormandy‏Verified account @taviso Aug 22
      Replying to @__b_c @RichFelker

      Why couldn't i just download meterpreter or whatever, run it and walk away? That kinda seems easier than "steal cookies", what's the process you're thinking of that doesn't require any code? Login to dropbox, navigate to %USERPROFILE%, upload cookies.db?

      1 reply 0 retweets 1 like
    6. Brian Campbell‏ @__b_c Aug 22
      Replying to @taviso @RichFelker

      i'm thinking of just viewing the cookie in the browser prefs

      1 reply 0 retweets 0 likes
    7. Tavis Ormandy‏Verified account @taviso Aug 22
      Replying to @__b_c @RichFelker

      And memorizing it...? You have to save it somewhere, otherwise you're stuck transcribing it so you can use it - that's a lot of work. Is your argument that attacker will say "darn, token binding, I'll give up" instead of slightly different attack with same impact?

      1 reply 0 retweets 1 like
    8. Brian Campbell‏ @__b_c Aug 22
      Replying to @taviso @RichFelker

      only that it wouldn't work when they attempted to use it later

      1 reply 0 retweets 0 likes
    9. Tavis Ormandy‏Verified account @taviso Aug 22
      Replying to @__b_c @RichFelker

      I think I understand all the arguments now, I think Token Binding is a solution looking for a problem! Hopefully you can see why someone might feel that way 😁

      2 replies 0 retweets 4 likes
    10. Hans Zandbelt‏ @hanszandbelt Aug 23
      Replying to @taviso @__b_c @RichFelker

      That feels like claiming we don't need 2-factor auth as long as we keep our passwords safe

      2 replies 0 retweets 0 likes
      Rich Felker‏ @RichFelker Aug 23
      Replying to @hanszandbelt @__b_c

      A claim I largely agree with - while there are some places 2FA helps (and many it hurts!), the big problem is people storing passwords in their brains or on paper rather than in a PW manager that knows not to enter them in places it shouldn't.

      11:20 AM - 23 Aug 2018
      1 reply 0 retweets 0 likes
        1. Hans Zandbelt‏ @hanszandbelt Aug 23
          Replying to @RichFelker @__b_c

          So that's reality (I'm referring to people's behavior) that you can't argue with; by the same token(!) security architects would like to avoid token disclosure without relying on factors they don't control/know

          0 replies 0 retweets 0 likes
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