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__x86's profile
Jeremy Fetiveau
Jeremy Fetiveau
Jeremy Fetiveau
@__x86

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Jeremy Fetiveau

@__x86

exploiting chrome, occasional contributor to http://doar-e.github.io 

worldwide
doar-e.github.io
Joined January 2011

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    1. raycp‏ @raycp2 Mar 11
      • Report Tweet
      • Report NetzDG Violation

      raycp Retweeted ohjin

      i just started to analysis this function, interesting....https://twitter.com/pwn_expoit/status/1237404487469260801 …

      raycp added,

      ohjin @pwn_expoit
      [turbofan] Harden BuildElementAccess against potential typer bugs https://chromium.googlesource.com/v8/v8/+/fa5fc748e53ad9d3ca44050d07659e858dbffd94 …
      1 reply 0 retweets 3 likes
      Jeremy Fetiveau‏ @__x86 Mar 11
      • Report Tweet
      • Report NetzDG Violation
      Replying to @raycp2

      The purpose of this commit is to prevent elimination of NumberLessThan nodes, which is a way to circumvent aborting bound checks. I discussed an example on the @doar_e blog : https://doar-e.github.io/blog/2019/05/09/circumventing-chromes-hardening-of-typer-bugs/ …

      5:15 AM - 11 Mar 2020
      • 8 Likes
      • Adrian `Ivan Chen Zhixiang Alino Brinly molgryn Daniel Shapiro AbdulAziz Hariri
      3 replies 0 retweets 8 likes
        1. New conversation
        2. raycp‏ @raycp2 Mar 11
          • Report Tweet
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          Replying to @__x86 @doar_e

          yeah, i figured out the theory about the out-of-bound store and load mode in reduce element access, it's interesting, thanks for the blog, i got a deeper understanding about `reduce jsload/storeproperty` , and if needed i'll write a analysis of this new mitigation.

          1 reply 0 retweets 1 like
        3. Jeremy Fetiveau‏ @__x86 Mar 11
          • Report Tweet
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          Replying to @raycp2 @doar_e

          Sounds exciting! Feel free to ping @0vercl0k and I if you feel like contributing something to @doar_e . It’s an open platform, everyone is welcome 🙂

          0 replies 0 retweets 1 like
        4. End of conversation
        1. Jeremy Fetiveau‏ @__x86 Mar 11
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          Replying to @__x86 @raycp2 @doar_e

          They started with this commit last year : https://chromium-review.googlesource.com/c/v8/v8/+/1460461 … It's interesting to see that now there are changes in BuildElementAccess and ReduceJSCreateArray (as @pwn_expoit tweeted about)

          0 replies 0 retweets 3 likes
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        1. James Willy‏ @james0x40 Mar 11
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          Replying to @__x86 @raycp2 @doar_e

          With this commit, V8 has become more resistable against typer bugs.

          0 replies 0 retweets 0 likes
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          Undo

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