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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 7 Nov 2017

      Dan Guido Retweeted Parity Technologies

      No one using this wallet library can withdraw funds, and all their ether is likely lost.https://twitter.com/ParityTech/status/927857866203127808 …

      Dan Guido added,

      Parity Technologies @ParityTech
      UPDATE: For details on the security alert please read this announcement. https://paritytech.io/blog/security-alert.html …
      4 replies 52 retweets 67 likes
      Show this thread
    2. Dan Guido‏ @dguido 7 Nov 2017

      The wallet contract was deployed 109 days ago yet initWallet was only called 22 hours ago, triggering the bug. https://etherscan.io/address/0x863df6bfa4469f3ead0be8f9f2aae51c91a907b4 …

      1 reply 12 retweets 13 likes
      Show this thread
    3. Dan Guido‏ @dguido 7 Nov 2017

      Dan Guido Retweeted Patrick McCorry  ☘️

      Reports are pouring in and the total USD dollar amount may be among the largest ever, now at $278mil USD (1mil ETH).https://twitter.com/paddyucl/status/927885515407454209 …

      Dan Guido added,

      Patrick McCorry  ☘️ @paddykcl
      Over 1 million ether (around $278,359,059 US) is the total impact of @ParityTech based on https://pastebin.com/ejakDR1f  https://docs.google.com/spreadsheets/d/18dUFWIk84dmJngBoZG8BBk6S_P2MIzKcUB5LMdUY1Kg/edit?usp=sharing …
      Show this thread
      1 reply 17 retweets 29 likes
      Show this thread
    4. Dan Guido‏ @dguido 7 Nov 2017

      The bug looks like a mistake, not an attack, due to forgetting to initialize the wallet when it was deployed.

      2 replies 2 retweets 10 likes
      Show this thread
      Dan Guido‏ @dguido 7 Nov 2017

      We recently completed an audit that had precisely this bug. To all smart contract developers: consider initialization very carefully!

      5:53 AM - 7 Nov 2017
      • 4 Retweets
      • 19 Likes
      • 岡部 倫太郎 Paul Makowski Tom Church Billiard Lentil Kristov Atlas Rick Dudley Robert Kugler Amber Baldet Carrie McQueen
      1 reply 4 retweets 19 likes
        1. New conversation
        2. Dan Guido‏ @dguido 7 Nov 2017

          Further, mark initialization methods as onlyOwner. We expect to see attacks that exploit race conditions against these methods in the future

          1 reply 1 retweet 9 likes
          Show this thread
        3. Dan Guido‏ @dguido 7 Nov 2017

          Parity likely did not think of their wallet as a classic contract. Their code is in a library, and they delegatecall to execute it directly.

          3 replies 3 retweets 5 likes
          Show this thread
        4. Dan Guido‏ @dguido 7 Nov 2017

          Dan Guido Retweeted Tuur Demeester

          Ironic, yet totally expected: Gavin Wood, author of the insecure Parity Wallet, personally lost $90mil in ETH.https://twitter.com/tuurdemeester/status/927906221692157953 …

          Dan Guido added,

          Tuur Demeester @TuurDemeester
          Critical Parity bug leaves +$150M in $ETH frozen, including $90M of Gavin Woods' Polkadot ICO. Cue clamoring for new hard-fork bailout... https://twitter.com/petertoddbtc/status/927873786623549440 …
          Show this thread
          4 replies 25 retweets 35 likes
          Show this thread
        5. Dan Guido‏ @dguido 7 Nov 2017

          Contact me if you’re interested in funding development of a secure wallet library built on formal methods by @trailofbits (also, audits!)

          2 replies 10 retweets 18 likes
          Show this thread
        6. Dan Guido‏ @dguido 7 Nov 2017

          Dan Guido Retweeted MyEtherWallet.com

          The culprit for this latest Parity Wallet issue may have been identified.https://twitter.com/myetherwallet/status/927900639832748032 …

          Dan Guido added,

          MyEtherWallet.comVerified account @myetherwallet
          🍿🍸😬 😬 pic.twitter.com/lKV7Hm4rD7
          Show this thread
          2 replies 3 retweets 12 likes
          Show this thread
        7. Dan Guido‏ @dguido 7 Nov 2017

          Dan Guido Retweeted more alien

          As @maurelian_ suggests, the Simple Multisig wallet is probably the best starting point for formal verificationhttps://twitter.com/maurelian_/status/927934498716524545 …

          Dan Guido added,

          more alien @maurelian_
          I'm avoiding distraction by Parity multisig. Let's formally verify these 40 lines n' be done w/ it. https://github.com/christianlundkvist/simple-multisig/blob/master/contracts/SimpleMultiSig.sol … cc @phildaian
          1 reply 1 retweet 5 likes
          Show this thread
        8. Dan Guido‏ @dguido 14 Nov 2017

          Here's the postmortem on the Parity wallet self-destruct by the authors of it: https://blog.ethcore.io/security-is-a-process-a-postmortem-on-the-parity-multi-sig-library-self-destruct/ …

          0 replies 2 retweets 2 likes
          Show this thread
        9. End of conversation

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