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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 Apr 25
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      Dan Guido Retweeted

      We're hired to provide industry-best advice @trailofbits, and that's exactly what we provided to @HegicOptions. How, then, were bugs found in their code mere hours after they deployed it to mainnet? (1/n) https://twitter.com/HegicOptions/status/1253937104666742787 …

      Dan Guido added,

      This Tweet is unavailable.
      11 replies 73 retweets 211 likes
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    2. Dan Guido‏ @dguido Apr 25
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      In 3 days earlier this month, we identified 10 critical flaws in @HegicOptions that could harm users. We noted a lack of tests, a lack of documentation, and that the time afforded to review their code was insufficient. Bottom line: we told them to hold off deploying.pic.twitter.com/sCH1QOyK89

      3 replies 3 retweets 40 likes
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    3. Dan Guido‏ @dguido Apr 25
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      This was the right advice, and we generally expect people listen to us when they're paying for our help. Instead, Hegic patched the few bugs we found, made no further changes, misrepresented our 3-day code review as an "audit", then immediately deployed.pic.twitter.com/m7b1u1IDrK

      4 replies 1 retweet 34 likes
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    4. Dan Guido‏ @dguido Apr 25
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      Dan Guido Retweeted Georgios Konstantopoulos

      https://twitter.com/gakonst/status/1253987789219205121 …

      Dan Guido added,

      Georgios Konstantopoulos @gakonst
      The bug: This `for` loop does _not_ loop over the provided arguments' array length, but over the storage variable's `options` length. This means that if you provide it with fewer elements than in the `options` array, it will always fail Fix: use the right bounds pic.twitter.com/F9xjMZaGGQ
      Show this thread
      2 replies 0 retweets 19 likes
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    5. Dan Guido‏ @dguido Apr 25
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      This is when the uproar began. There are some who mistakenly relied on a code review from @trailofbits as proof that @HegicOptions would never get hacked, without ever reading the report or investigating further. If they did their own investigation, what would they find?

      1 reply 0 retweets 29 likes
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      Dan Guido‏ @dguido Apr 25
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      They would find that their code had no documentation, not even a README file. They wouldn't find a single test. They would find that our report concluded by warning more bugs exist, and that time allocated was insufficient.pic.twitter.com/v8JkRZXz1E

      9:07 PM - 25 Apr 2020
      • 1 Retweet
      • 37 Likes
      • EffAlt Henk Poley Kaden Aparna Krishnan ChainLinkGod.eth 👨‍🌾🌽💾 Zaki Manian Matt List Rick Dudley (afdudley.eth) Fei Strife
      2 replies 1 retweet 37 likes
        1. New conversation
        2. Dan Guido‏ @dguido Apr 25
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          They would find my numerous public statements (https://defiprime.com/defi-smart-contract-audits …) and client guidelines (https://github.com/trailofbits/publications/blob/master/reviews/citation_guidelines.pdf …) to distrust projects that solely rely on code audits as proof of safety. They would find that 3 days is an extremely short review.pic.twitter.com/sY6pDlNSEe

          1 reply 1 retweet 39 likes
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        3. Dan Guido‏ @dguido Apr 25
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          Dan Guido Retweeted Dan Guido

          They would find my thread from just last week, describing the holistic activities needed to secure a DeFi project.https://twitter.com/dguido/status/1251960692460093443 …

          Dan Guido added,

          Dan Guido @dguido
          Replying to @tayvano_ @MyCrypto and 15 others
          "Evaluate your code for known flaws and ensure the absence of them." Reentrancy is extraordinarily well-understood and many tools are able to catch it, including Slither and @CryticCI. https://github.com/crytic/slither#detectors …
          1 reply 2 retweets 27 likes
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        4. Dan Guido‏ @dguido Apr 25
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          Dan Guido Retweeted beta.mycrypto.com

          ... and they'd find the consensus opinion of the blockchain industry is to avoid misrepresenting security reviews as certifications of safety. https://twitter.com/zmanian/status/1254220509077598214 … https://twitter.com/rleshner/status/1254151232677003264 …https://twitter.com/MyCrypto/status/1254119736020881408 …

          Dan Guido added,

          beta.mycrypto.comVerified account @MyCrypto
          Replying to @defiprime @dguido and 4 others
          You're so close. > Developers use audits to prove its safe THIS IS THE PROBLEM WITH WHAT HEGIC DID. They have the full report + discussions with trailofbits. THE FACT THEY TOLD YOU IT WAS SAFE INDICATES THEY ARE DELUSIONAL OR MALICIOUS both which have the same outcome for YOU.
          2 replies 0 retweets 24 likes
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        5. Dan Guido‏ @dguido Apr 25
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          Dan Guido Retweeted Rick Dudley (afdudley.eth)

          This was obvious to anyone that had hired a security firm, or been on the receiving end of a security report before. https://twitter.com/MyCrypto/status/1254058121342803968 …https://twitter.com/AFDudley0/status/1254018557685325825 …

          Dan Guido added,

          Rick Dudley (afdudley.eth) @AFDudley0
          Replying to @hitchcott @HegicOptions @ETHLDN
          The summary itself is pretty grim. @trailofbits
          1 reply 0 retweets 24 likes
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        6. Dan Guido‏ @dguido Apr 25
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          Dan Guido Retweeted Chris Hitchcott

          It was more than just security experts who understood this about @HegicOptions. It was obvious that further work was needed to non-experts too. “It's OK we have no tests because the auditors will catch all the bugs” said no one ever https://twitter.com/BlockEnthusiast/status/1254132916675907584 …https://twitter.com/hitchcott/status/1253982497446166528 …

          Dan Guido added,

          Chris Hitchcott @hitchcott
          Replying to @hitchcott @HegicOptions
          Oh wait, you don't have a test suite...? https://github.com/hegic/hegic-contracts-v1 … Shame on all you #DeFI bros promoting this. @DegenSpartan @defiprime
          1 reply 0 retweets 23 likes
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        7. Dan Guido‏ @dguido Apr 25
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          Dan Guido Retweeted Dr Heidy Khlaaf (هايدي خلاف)

          We know there are roadblocks to interpreting our results by non-experts. For example, we purposefully avoid subjective opinions in our reports, preferring objective facts to maintain our integrity and independence.https://twitter.com/HeidyKhlaaf/status/1254121886902083584 …

          Dan Guido added,

          Dr Heidy Khlaaf (هايدي خلاف) @HeidyKhlaaf
          Replying to @dguido @defiprime and 5 others
          These criticism lack any realism in how auditing works. Working in Safety, where government auditors are also involved, independent auditors have their hand tied and can seldomly make "human readable" recommendations. We provide objective technical observations. That's it.
          1 reply 0 retweets 21 likes
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        8. Dan Guido‏ @dguido Apr 25
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          Dan Guido Retweeted Jordan Spence

          Further, it's possible for clients to simply ignore what we document in reports. @trailofbits does not have any authority over our clients, we simply provide them advice. https://twitter.com/HeidyKhlaaf/status/1254122500407152640 …https://twitter.com/spencecoin/status/1254116602720608258 …

          Dan Guido added,

          Jordan SpenceVerified account @spencecoin
          Replying to @Rewkang @defiprime and 4 others
          ^^^^ THIS Security audits are an audit of the security. They are purely objective. They provided ALL the information and unfortunately can't control what happens after that information is given. Dan and trailofbits performed exactly as they should have.
          1 reply 0 retweets 20 likes
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        9. Dan Guido‏ @dguido Apr 25
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          How will we improve after this incident? 1st, we will no longer work with @HegicOptions. Their behavior has been deeply irresponsible. They ignored our advice and recklessly put user funds at risk. This hurts the entire DeFi community.

          2 replies 7 retweets 52 likes
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        10. Dan Guido‏ @dguido Apr 25
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          2nd, we will keep services from @trailofbits accessible for those with lower or limited financial resources. Security assistance is essential for smaller projects, and we'll continue to help those that need it with shorter project sizes.

          3 replies 2 retweets 48 likes
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        11. Dan Guido‏ @dguido Apr 25
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          3rd, we'll add structure to our summary reports to help readers better evaluate the current state and maturity of the project while remaining objective. It's unfortunate so few people look beyond our reports so we'll provide stats and info about the code in them.

          2 replies 3 retweets 49 likes
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        12. Dan Guido‏ @dguido Apr 25
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          cc @defiprime @lalleclausen @tzhen @drVillo @preston_vanloon @hitchcott @intocryptoast @quentinc137 @Fiskantes @ck_SNARKs @nicksdjohnson @ChainLinkGod @hosseeb @IamNomad @JTremback Thanks for your earlier comments! We're open to hearing your opinions about how we can improve.

          7 replies 0 retweets 36 likes
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        13. End of conversation

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