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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. Nico Waisman‏ @nicowaisman 12 Aug 2019
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      On Friday I spent the afternoon looking at @trailofbits excellent work on Kubernetes (https://github.com/trailofbits/audit-kubernetes/tree/master/reports …). As you know, I have been chasing interesting bug classes as part of my daily job, and I found one in the report which I decide to QL (1/n)

      1 reply 14 retweets 37 likes
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    2. Nico Waisman‏ @nicowaisman 12 Aug 2019
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      The vulnerability #13 "Overflows when using strconv.Atoi and downcasting the result" basically consist of the method Atoi which returns an int (64 bits on 64b environment)

      1 reply 0 retweets 2 likes
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    3. Nico Waisman‏ @nicowaisman 12 Aug 2019
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      Here is one example. In this case, they are actually casting to 32bits to define a port number. Is not really that harmful, but it give you an idea of the problems it could arise.pic.twitter.com/fYCrfsPgGk

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    4. Nico Waisman‏ @nicowaisman 12 Aug 2019
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      On the Appendix B, you can find a list of 14 places where they found this behaviour. I thought it was a great case for Variant Analysis! Let see if we can find a bit more cases

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    5. Nico Waisman‏ @nicowaisman 12 Aug 2019
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      I wrote a simple QL query that do Local TainTracking and try to track if the result of Atoi ends up on a wrapper of 32 bits or less! (run it on kubernetes and all their staging proyects)pic.twitter.com/DMgGd2iPEX

      1 reply 3 retweets 9 likes
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    6. daveaitel‏ @daveaitel 12 Aug 2019
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      Replying to @nicowaisman @trailofbits

      Did you find some that they missed?

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    7. Nico Waisman‏ @nicowaisman 12 Aug 2019
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      Replying to @daveaitel @trailofbits

      Yep. They were 10 more from the report. https://github.com/kubernetes/kubernetes/issues/81121#issuecomment-520544280 … But I went through all the staging projects.

      1 reply 0 retweets 0 likes
      Dan Guido‏ @dguido 12 Aug 2019
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      Replying to @nicowaisman @daveaitel @trailofbits

      Dan Guido Retweeted Bobby T

      "missed" is the wrong way to frame it, since we didn't suggest we were comprehensive. It was a demonstration that further research should get conducted.https://twitter.com/b0bbytabl3s/status/1160998111763767300 …

      Dan Guido added,

      Bobby T @b0bbytabl3s
      Replying to @lojikil @cji
      Yeah, this is a fantastic example of what I wanted to see the report used as - a stepping stone to do more awesome analysis. I dig it. 🤙
      2:14 PM - 12 Aug 2019
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      • Nico Waisman
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        1. Dan Guido‏ @dguido 12 Aug 2019
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          Replying to @dguido @nicowaisman and

          Dan Guido Retweeted Trail of Bits

          Our goals for the review were to build a foundation for further research and broadly survey as much attack surface as possible: https://twitter.com/trailofbits/status/1158895151886032897 …. Nico's work is exactly what we hoped would come from it.

          Dan Guido added,

          Trail of Bits @trailofbits
          Replying to @bascule @KirinDave
          Yes, and we were directed to go for breadth (see discussion in the coverage section). We hope our work provides the foundation for rooting out many high-risk bugs in the future! https://twitter.com/Atlas_Hugged/status/1158774619324633089 … pic.twitter.com/t8uEtPGdFX
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