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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. Rich Felker‏ @RichFelker 23 Nov 2015

      To anyone considering MITM certs, even for AV, etc.: By doing this, you are completely disabling the browser's ability to detect forgery.

      1 reply 0 retweets 0 likes
    2. Martin Lucina‏ @matolucina 23 Nov 2015
      Replying to @RichFelker

      @RichFelker To play devil's advocate, what's stopping MITM box from doing forgery checking, cert pinning, or anything else browser w/ do?

      1 reply 0 retweets 0 likes
    3. Rich Felker‏ @RichFelker 23 Nov 2015
      Replying to @matolucina

      @matolucina Even if they were competent and willing to, there's no way to present results to use user & keep up with latest browser behavior

      2 replies 0 retweets 0 likes
    4. Martin Lucina‏ @matolucina 25 Nov 2015
      Replying to @RichFelker

      @RichFelker The MITM proxy could inject UI into existing webpages and auto-update itself to follow best practice. Hard? Yes. But possible.

      1 reply 0 retweets 0 likes
    5. Rich Felker‏ @RichFelker 25 Nov 2015
      Replying to @matolucina

      Rich Felker Retweeted Martin Lucina

      @matolucina That's utterly awful and a huge new attack surface. WHY do people think ideas like this are respectable?https://twitter.com/matolucina/status/669537987634585601 …

      Rich Felker added,

      Martin Lucina @matolucina
      Replying to @RichFelker
      @RichFelker The MITM proxy could inject UI into existing webpages and auto-update itself to follow best practice. Hard? Yes. But possible.
      1 reply 0 retweets 0 likes
    6. Martin Lucina‏ @matolucina 25 Nov 2015
      Replying to @RichFelker

      @RichFelker Ah, but what if you (the user) own and thus trust the *proxy*, but don't own/trust/fully control the *browser*?

      1 reply 0 retweets 0 likes
      Rich Felker‏ @RichFelker 25 Nov 2015
      Replying to @matolucina

      @matolucina Yes this happens with appliances with emb. browsers (think Chromecast) but fixing them isn't worth killing the whole trust model

      7:51 AM - 25 Nov 2015
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Rich Felker‏ @RichFelker 25 Nov 2015
          Replying to @RichFelker

          @matolucina Ultimately the endpoint (browser box) has full control over what it trusts/does, and can circumvent anything short of mod'ing it

          1 reply 0 retweets 0 likes
        3. Rich Felker‏ @RichFelker 25 Nov 2015
          Replying to @RichFelker

          @matolucina The fix for malicious embedded endpoints it not to MITM them (they can stop this) but to mod or replace them with open hw/FOSS.

          0 replies 0 retweets 0 likes
        4. End of conversation

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