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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. CopperheadOS‏ @CopperheadOS Jan 5

      CopperheadOS Retweeted Benjamin Kramer

      Good point, will hold off on talking about pinning to in-order efficiency cores as a potential mitigation until there's a diverse set of approaches to exploiting the issues to test against the in-order execution cores. May or may not pan out as useful.https://twitter.com/d0k/status/949311943675924481 …

      CopperheadOS added,

      Benjamin Kramer @d0k
      Replying to @CopperheadOS
      Speculative execution and in-order processing are not mutually exclusive. The LITTLE cores do branch prediction, I wouldn't be surprised if they speculate memory accesses too.
      1 reply 2 retweets 3 likes
      Show this thread
    2. CopperheadOS‏ @CopperheadOS Jan 5

      If it does provide a useful mitigation for side channels, it would make it worth considering supporting an Android One device with only in-order cores (Snapdragon 625, etc.) even though they would have security sacrifices vs. bleeding edge Pixel 2 verified boot, encryption, etc.

      1 reply 1 retweet 5 likes
      Show this thread
    3. Rich Felker‏ @RichFelker Jan 5
      Replying to @CopperheadOS

      I'd love that. I care about remote vectors, dragnet, etc. not targeted physical attacks.

      2 replies 0 retweets 0 likes
      Rich Felker‏ @RichFelker Jan 5
      Replying to @RichFelker @CopperheadOS

      The price for devices with strong physical defenses actually makes them unsuitable for that purpose IMO - they're too expensive to throw away when potentially compromised.

      8:30 AM - 5 Jan 2018
      1 reply 0 retweets 0 likes
        1. New conversation
        2. CopperheadOS‏ @CopperheadOS Jan 5
          Replying to @RichFelker

          Unfortunately, there are very few cheap devices with proper security updates and reasonable firmware security. Android One is almost providing what the Nexus line used to provide but it's just not quite there.

          1 reply 0 retweets 2 likes
        3. CopperheadOS‏ @CopperheadOS Jan 5
          Replying to @CopperheadOS @RichFelker

          In theory, it's supposed to be a more diverse Nexus line with even cheaper options. In reality, they're not providing the same level of security / support and they're not making it as easy to make proper production builds by making available everything that they use for theirs.

          1 reply 0 retweets 0 likes
        4. CopperheadOS‏ @CopperheadOS Jan 5
          Replying to @CopperheadOS @RichFelker

          For example, it SEEMS like the Android One kernels are in AOSP, but it's likely there are device-specific modifications and configuration and it's not clear where that would be along with factory images for the devices and whatever else is needed to do proper builds for them.

          1 reply 0 retweets 0 likes
        5. CopperheadOS‏ @CopperheadOS Jan 5
          Replying to @CopperheadOS @RichFelker

          Not interested in hacking together support. It needs to be on par with their production releases, which is hard enough for Nexus / Pixel phones... Hoping that Android One is both going to expand and improve because there's little other hope for mobile security for the masses.

          0 replies 1 retweet 1 like
        6. End of conversation

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