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dguido's profile
Dan Guido
Dan Guido
Dan Guido
@dguido

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Dan Guido

@dguido

CEO @trailofbits, organizer @EmpireHacking, director @hack_secure. Open DMs.

Brooklyn, NY
trailofbits.com
Joined April 2008

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    1. Dan Guido‏ @dguido May 14

      Before anyone freaks out about "efail", realize that using it would be: 1) extremely easy to detect 2) archived in your target's email As an attacker, I could not care less about this technique. It's intellectually neat, but operationally stupid. https://efail.de/efail-attack-paper.pdf …

      5 replies 90 retweets 149 likes
      Show this thread
    2. Dan Guido‏ @dguido May 14

      Most of us archive our entire history of email. The efail team could have released scripts that review your mailbox for signs of exploitation. Don't you think an img tag wrapping the multipart header would stick out a bit? Even the CFB/CBC gadget is discoverable after decrypting.

      2 replies 10 retweets 31 likes
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    3. Dan Guido‏ @dguido May 14

      I also don't see any attempt to coordinate with major MTAs (e.g., Google or Microsoft). MTAs could have set up detections for direct exploitation and, likely, reviewed everyone's mailboxes for already delivered mail.pic.twitter.com/26SojYl2xb

      2 replies 7 retweets 26 likes
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    4. Dan Guido‏ @dguido May 14

      Don't confuse my distaste for the disclosure with advocacy for S/MIME, PGP, or encrypted email. You should: 1) use authenticated cryptography ffs! 2) stop using email and start using Signal if you need privacy

      5 replies 3 retweets 20 likes
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    5. scriptjunkie‏ @scriptjunkie1 May 14
      Replying to @dguido

      scriptjunkie Retweeted Alfredo Ortega

      Please no. That would be out of the frying pan, but into the fire.https://twitter.com/ortegaalfredo/status/995912662130229248?s=20 …

      scriptjunkie added,

      Alfredo Ortega @ortegaalfredo
      And we'll release the Signal-Desktop Remote code exec advisory (CVE-2018-10994) in some hours. Not a good week for privacy software. https://twitter.com/seecurity/status/995906576170053633 …
      1 reply 0 retweets 0 likes
      Dan Guido‏ @dguido May 14
      Replying to @scriptjunkie1

      I think you’re confusing one bug with an architectural failure. I’d like it too if Signal completely ditched Desktop, but it’s miles and miles ahead of email even with it. Empheral communication and minimized metadata are huge wins for Signal.

      7:18 AM - 14 May 2018
      • 1 Like
      • Minh-Triet Pham Tran
      1 reply 0 retweets 1 like
        1. scriptjunkie‏ @scriptjunkie1 May 14
          Replying to @dguido

          I like that about signal, and really dislike PGP's failings. But most use them for different tasks. Signal largely does not attempt to meet the desktop messaging need, (e.g. send files) and its desktop version's recent bugs show it's traded one architectural dumpster for another

          0 replies 0 retweets 2 likes
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