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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. Rich Felker‏ @RichFelker 29 Jun 2016
      Replying to @tqbf @phryanjr

      I don't see most use as a "protection"; rather it just makes throwing away & replacing a compromised environment easy.

      1 reply 0 retweets 0 likes
    2. Thomas H. Ptacek‏ @tqbf 29 Jun 2016
      Replying to @RichFelker @phryanjr

      Yes, but to do that, you have to trust that the host isn’t compromised, and you probably shouldn’t.

      2 replies 0 retweets 0 likes
    3. Thomas H. Ptacek‏ @tqbf 29 Jun 2016
      Replying to @tqbf @RichFelker @phryanjr

      Maybe in 5 years or so, we’ll be at a point where a typical best-practices non-hardened container survives RCE.

      1 reply 0 retweets 0 likes
    4. CopperheadOS‏ @CopperheadOS 29 Jun 2016
      Replying to @tqbf @RichFelker @phryanjr

      Linux kernel security is trending in the wrong direction. More complexity, more attack surface, more code churn.

      1 reply 1 retweet 3 likes
    5. Rich Felker‏ @RichFelker 29 Jun 2016
      Replying to @CopperheadOS @tqbf @phryanjr

      One outcome of my taking on kernel work might be gaining enough experience to redo it right. :-)

      1 reply 0 retweets 0 likes
    6. CopperheadOS‏ @CopperheadOS 29 Jun 2016
      Replying to @RichFelker @tqbf @phryanjr

      It really needs a many-pronged approach, and the Linux kernel is failing at every aspect of improving security.

      1 reply 1 retweet 0 likes
    7. CopperheadOS‏ @CopperheadOS 29 Jun 2016
      Replying to @CopperheadOS @RichFelker and

      Moving more code into the kernel, instead of moving towards a microkernel like competing operating systems.

      1 reply 0 retweets 1 like
    8. CopperheadOS‏ @CopperheadOS 29 Jun 2016
      Replying to @CopperheadOS @RichFelker and

      And sticking with using entirely C, instead of migrating towards a safe language for new / rewritten components.

      3 replies 0 retweets 0 likes
    9. CopperheadOS‏ @CopperheadOS 29 Jun 2016
      Replying to @stribika @RichFelker and

      It's a lot more now. eBPF expanded it into something scarier and added use cases like profiling rules.

      2 replies 0 retweets 0 likes
      Rich Felker‏ @RichFelker 29 Jun 2016
      Replying to @CopperheadOS @stribika and

      Last I checked you could disable all that crap entirely at configure time, though.

      11:14 AM - 29 Jun 2016
      1 reply 0 retweets 0 likes
        1. New conversation
        2. CopperheadOS‏ @CopperheadOS 29 Jun 2016
          Replying to @RichFelker @stribika and

          Not as much can be disabled as you'd expect. It's not even possible to disable PERF_EVENTS on x86_64.

          1 reply 0 retweets 0 likes
        3. CopperheadOS‏ @CopperheadOS 29 Jun 2016
          Replying to @CopperheadOS @RichFelker and

          AFAIK, eBPF is essentially mandatory. JIT compiler is disabled by default with sysctl toggle though.

          1 reply 0 retweets 0 likes
        4. Rich Felker‏ @RichFelker 29 Jun 2016
          Replying to @CopperheadOS @stribika and

          NET selects BPF, but BPF_JIT is optional, not even present on all archs, and BPF_SYSCALL is optional

          0 replies 0 retweets 0 likes
        5. End of conversation

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