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j00ru's profile
j00ru//vx
j00ru//vx
j00ru//vx
@j00ru

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j00ru//vx

@j00ru

Windows hacker & vulnerability researcher. Google Project Zero. @DragonSectorCTF

Poland
j00ru.vexillium.org
Joined April 2010

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    1. j00ru//vx‏ @j00ru Jun 21

      j00ru//vx Retweeted Ben Hawkes

      In summary of the last ~1.5 years of my work, I wrote a comprehensive whitepaper on the limitations of C language, kernel infoleaks, Bochspwn Reloaded and many related topics. It's out now! Thanks to all involved. Feels good 😎https://twitter.com/benhawkes/status/1009835610931060736 …

      j00ru//vx added,

      Ben Hawkes @benhawkes
      Project Zero blog: "Detecting Kernel Memory Disclosure – Whitepaper" by @j00ru - https://googleprojectzero.blogspot.com/2018/06/detecting-kernel-memory-disclosure.html …
      15 replies 564 retweets 1,202 likes
    2. Ned Williamson‏ @NedWilliamson Jun 21
      Replying to @j00ru

      It would be amazing to run this under syzkaller if support was ported to x86!

      1 reply 0 retweets 0 likes
    3. Dmitry Vyukov‏ @dvyukov Jun 22
      Replying to @NedWilliamson @j00ru

      We just need to find at least one person out there who cares about i386 linux. I don't know maybe it works already (since we have arm). But I have hard time justifying spending any of my time on it...

      1 reply 0 retweets 0 likes
    4. Dmitry Vyukov‏ @dvyukov Jun 22
      Replying to @dvyukov @NedWilliamson @j00ru

      What I do care about is x86_64 linux + KMSAN.

      1 reply 0 retweets 0 likes
    5. Ned Williamson‏ @NedWilliamson Jun 22
      Replying to @dvyukov @j00ru

      I was about to say, I almost forgot about syzkaller + kmsan, which should be higher quality anyways since you have better instrumentation

      1 reply 0 retweets 0 likes
    6. Dmitry Vyukov‏ @dvyukov Jun 22
      Replying to @NedWilliamson @j00ru

      Also easier to maintain, detect put_user, port to arm64, etc. It's almost alive and kicking, grep for KMSAN here https://syzkaller.appspot.com/?fixed=upstream  and here https://syzkaller.appspot.com/ 

      1 reply 0 retweets 1 like
    7. Ned Williamson‏ @NedWilliamson Jun 22
      Replying to @dvyukov @j00ru

      Exciting :)

      1 reply 0 retweets 0 likes
      j00ru//vx‏ @j00ru Jun 22
      Replying to @NedWilliamson @dvyukov

      I agree, syzkaller + KMSAN is an awesome combo and definitely a good long-term approach for Linux. Bochspwn Reloaded is no competition to the sanitizers, as by definition source code-level instrumentation is more powerful than DBI

      3:10 AM - 22 Jun 2018
      • 1 Like
      • L4w
      1 reply 0 retweets 1 like
        1. j00ru//vx‏ @j00ru Jun 22
          Replying to @j00ru @NedWilliamson @dvyukov

          However if someone really wanted to run syzkaller + Bochspwn Reloaded, it should be possible to add support for x64 in the latter with some dev. work. There probably aren't any fundamental obstacles, as evidenced by the Windows x64 implementation ;)

          0 replies 0 retweets 1 like
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