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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 Jul 18

      j00ru//vx Retweeted j00ru//vx

      @_niklasb I guess you already know the technical details, but I only got around to it now, so FYI in case you're interested. :) the exploit code is at https://gist.github.com/j00ru/2347cf937366e61598d1140c31262b18 …https://twitter.com/j00ru/status/1019595401769422852 …

      j00ru//vx added,

      j00ru//vx @j00ru
      New blog post: Exploiting a Windows 10 PagedPool off-by-one overflow (WCTF 2018). https://j00ru.vexillium.org/2018/07/exploiting-a-windows-10-pagedpool-off-by-one/ …
      1 reply 6 retweets 24 likes
    2. Niklas B‏ @_niklasb Jul 18
      Replying to @j00ru

      Nice writeup! > with the write-what-where primitive in hand, executing ring-0 shellcode should be just a formality Really, at low integrity? Should require an "0day" GDI infoleak or similar no?

      1 reply 0 retweets 4 likes
    3. j00ru//vx‏ @j00ru Jul 18
      Replying to @_niklasb

      Thanks, and good question. I mostly meant it as "formality at Medium", but I guess even at low integrity you could leak the addresses of IDT/GDT and attack them, depending on how Windows was running (VM / bare metal etc.)

      1 reply 1 retweet 3 likes
      j00ru//vx‏ @j00ru Jul 18
      Replying to @j00ru @_niklasb

      Not to mention there's many "0-day" kernel address leaks from the pools that Microsoft fixes only in the next version of Windows, like https://bugs.chromium.org/p/project-zero/issues/detail?id=1456 … or some similar bugs.

      9:20 AM - 18 Jul 2018
      • 1 Retweet
      • 8 Likes
      • Hwiwon Lee Lays Michał Kowalczyk Niklas B Jacob Soo Guido Landi Adrian Meysam Firouzi slacker 🔹
      1 reply 1 retweet 8 likes
        1. j00ru//vx‏ @j00ru Jul 18
          Replying to @j00ru @_niklasb

          But in the end I agree it's mostly a formality with access to SystemModuleInformation, other scenarios are certainly trickier ;)

          0 replies 1 retweet 2 likes
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