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RichFelker's profile
Rich Felker
Rich Felker
Rich Felker
@RichFelker

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Rich Felker

@RichFelker

Yeah, I do @musllibc, FOSS & infosec stuff. But now is not the time for a mostly-/only-tech Twitter feed.

musl-libc.org
Joined March 2014

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    1. Niklas B‏ @_niklasb 15 Mar 2017

      First team to pwn Safari on macOS with escalation to root at #pwn2own! Was a ton of fun to pull that off with @5aelopic.twitter.com/4G8KNXuult

      9 replies 130 retweets 207 likes
    2. Niklas B‏ @_niklasb 15 Mar 2017
      Replying to @_niklasb

      Fun fact: the only memory corruption used in our sandbox escape is a NULL pointer dereference

      5 replies 37 retweets 89 likes
    3. Mitja Kolsek‏ @mkolsek 15 Mar 2017
      Replying to @_niklasb

      In kernel or did you find a new way to exploit it in user space?

      2 replies 0 retweets 0 likes
    4. Niklas B‏ @_niklasb 15 Mar 2017
      Replying to @mkolsek

      userspace, but we don't exploit directly. We just need the process to crash

      2 replies 0 retweets 3 likes
    5. Rich Felker‏ @RichFelker 16 Mar 2017
      Replying to @_niklasb @mkolsek

      So they do some bogus crash handling rather than immediately terminating?

      1 reply 0 retweets 0 likes
    6. Niklas B‏ @_niklasb 16 Mar 2017
      Replying to @RichFelker @mkolsek

      no the process just literally has to die :D

      2 replies 0 retweets 2 likes
      Rich Felker‏ @RichFelker 16 Mar 2017
      Replying to @_niklasb @mkolsek

      Wow, thought I was going to get a chance to pick on the awful, vuln-inducing practice of crash handlers...

      12:15 AM - 16 Mar 2017
      1 reply 0 retweets 0 likes
        1. Mitja Kolsek‏ @mkolsek 16 Mar 2017
          Replying to @RichFelker @_niklasb

          My theory: the process has to die in order to release an IPC end point that you can then replace with a fake one.

          0 replies 0 retweets 3 likes
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