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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. GCC - GNU Toolchain‏ @gnutools Jan 25

      GCC 7.3 Released! Includes fixes for #Spectre ! https://gcc.gnu.org/ml/gcc/2018-01/msg00197.html …

      4 replies 121 retweets 126 likes
    2. giuliohome2017‏ @giuliohome_2017 Jan 25
      Replying to @gnutools @tehjh

      What has to be recompiled and what is simply supposed to work on a fully patched kernel/container ⁉️🤔

      1 reply 0 retweets 0 likes
    3. Rich Felker‏ @RichFelker Jan 25
      Replying to @giuliohome_2017 @gnutools @tehjh

      It's not a fix, it's a workaround. Everything potentially affected must be compiled with the workaround in order to benefit.

      1 reply 1 retweet 0 likes
    4. giuliohome2017‏ @giuliohome_2017 Jan 25
      Replying to @RichFelker @gnutools @tehjh

      Aren't at-risk applications notably browsers? And doesn't the branch prediction version require both kernel and bios/uefi updates? Thank you for your support ✌👏

      1 reply 0 retweets 0 likes
    5. Rich Felker‏ @RichFelker Jan 25
      Replying to @giuliohome_2017 @gnutools @tehjh

      To be at-risk, the application must have valuable private data, attacker-controlled-data-dependent flow, and timing visible to the attacker. Browser example: auth tokens, js programs, and time apis+visible timing of network requests.

      1 reply 1 retweet 1 like
      Rich Felker‏ @RichFelker Jan 25
      Replying to @RichFelker @giuliohome_2017 and

      The canonical attacks are ones where the attacker-controlled "data" is code that runs in a sandbox/interpreter/jit, but...

      11:49 AM - 25 Jan 2018
      • 1 Retweet
      • 1 Like
      • giuliohome2017
      1 reply 1 retweet 1 like
        1. Rich Felker‏ @RichFelker Jan 25
          Replying to @RichFelker @giuliohome_2017 and

          Soon after Spectre was announced, I speculated (pardon the pun) that it may be possible to exploit via data that nobody thinks of as "code" if there are ways to observe the timing of processing it. Nobody has PoCs for that AFAIK, though.

          0 replies 1 retweet 2 likes
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