Skip to content
By using Twitter’s services you agree to our Cookies Use. We and our partners operate globally and use cookies, including for analytics, personalisation, and ads.
  • Home Home Home, current page.
  • About

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @
  • Language: English
    • Bahasa Indonesia
    • Bahasa Melayu
    • Català
    • Čeština
    • Dansk
    • Deutsch
    • English UK
    • Español
    • Filipino
    • Français
    • Hrvatski
    • Italiano
    • Magyar
    • Nederlands
    • Norsk
    • Polski
    • Português
    • Română
    • Slovenčina
    • Suomi
    • Svenska
    • Tiếng Việt
    • Türkçe
    • Ελληνικά
    • Български език
    • Русский
    • Српски
    • Українська мова
    • עִבְרִית
    • العربية
    • فارسی
    • मराठी
    • हिन्दी
    • বাংলা
    • ગુજરાતી
    • தமிழ்
    • ಕನ್ನಡ
    • ภาษาไทย
    • 한국어
    • 日本語
    • 简体中文
    • 繁體中文
  • Have an account? Log in
    Have an account?
    · Forgot password?
    New to Twitter?
    Sign up
marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

Tweets

Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

Tweets

  • © 2021 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • Imprint
  • Cookies
  • Ads info
Dismiss
Previous
Next

Go to a person's profile

Saved searches

  • Remove
  • In this conversation
    Verified accountProtected Tweets @
Suggested users
  • Verified accountProtected Tweets @
  • Verified accountProtected Tweets @

Promote this Tweet

Block

  • Tweet with a location

    You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more

    Your lists

    Create a new list

    Under 100 characters, optional
    Privacy

    Copy link to Tweet

    Embed this Tweet

    Embed this Video

    Add this Tweet to your website by copying the code below. Learn more

    Add this video to your website by copying the code below. Learn more

    Hmm, there was a problem reaching the server.

    By embedding Twitter content in your website or app, you are agreeing to the Twitter Developer Agreement and Developer Policy.

    Preview

    Why you're seeing this ad

    Log in to Twitter

    · Forgot password?
    Don't have an account? Sign up »

    Sign up for Twitter

    Not on Twitter? Sign up, tune into the things you care about, and get updates as they happen.

    Sign up
    Have an account? Log in »

    Two-way (sending and receiving) short codes:

    Country Code For customers of
    United States 40404 (any)
    Canada 21212 (any)
    United Kingdom 86444 Vodafone, Orange, 3, O2
    Brazil 40404 Nextel, TIM
    Haiti 40404 Digicel, Voila
    Ireland 51210 Vodafone, O2
    India 53000 Bharti Airtel, Videocon, Reliance
    Indonesia 89887 AXIS, 3, Telkomsel, Indosat, XL Axiata
    Italy 4880804 Wind
    3424486444 Vodafone
    » See SMS short codes for other countries

    Confirmation

     

    Welcome home!

    This timeline is where you’ll spend most of your time, getting instant updates about what matters to you.

    Tweets not working for you?

    Hover over the profile pic and click the Following button to unfollow any account.

    Say a lot with a little

    When you see a Tweet you love, tap the heart — it lets the person who wrote it know you shared the love.

    Spread the word

    The fastest way to share someone else’s Tweet with your followers is with a Retweet. Tap the icon to send it instantly.

    Join the conversation

    Add your thoughts about any Tweet with a Reply. Find a topic you’re passionate about, and jump right in.

    Learn the latest

    Get instant insight into what people are talking about now.

    Get more of what you love

    Follow more accounts to get instant updates about topics you care about.

    Find what's happening

    See the latest conversations about any topic instantly.

    Never miss a Moment

    Catch up instantly on the best stories happening as they unfold.

    1. Saleem Rashid‏ @saleemrash1d 22 Mar 2018
      • Report Tweet
      • Report NetzDG Violation

      I don't know whether this is true, but it's definitely possible (there are pin-compatible 64 KiB variants of the MCU). If you use the device without verifying the hardware, it's game over. To prevent Evil Maid attacks, that means checking at EVERY use.https://www.reddit.com/r/ledgerwallet/comments/86b7dk/important_to_everyone_who_bought_a_nano_ledger_s/ …

      7 replies 6 retweets 35 likes
      Show this thread
    2. Saleem Rashid‏ @saleemrash1d 22 Mar 2018
      • Report Tweet
      • Report NetzDG Violation

      Saleem Rashid Retweeted Hector Martin

      On the other hand, @marcan42 says there are no pin-compatible STM32s. My point still stands (you can likely attach SPI flash to the rear of the device, or perhaps attach a new board to the JTAG), but it seems like the Reddit user could be lying.https://twitter.com/marcan42/status/976917423822483456 …

      Saleem Rashid added,

      Hector Martin @marcan42
      Replying to @saleemrash1d @spudowiar
      I don't actually see any 64KiB pin-compatible variants. The only STM32 part with 64K flash and USB in that package is the STM32F302K6 (or K8), which is a completely different series and CPU (F3/Cortex-M4 instead of C0/Cortex-M0) and has a slightly different pinout.
      1 reply 2 retweets 3 likes
      Show this thread
    3. Hector Martin‏ @marcan42 22 Mar 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @saleemrash1d @spudowiar

      It is of course still entirely possible to stealthily carry out the attack (e.g. have one of the 48-pin 64K variants custom-packaged and labeled into a 32-pin package, China will do that for you), but quite a bit harder.

      1 reply 0 retweets 1 like
    4. Saleem Rashid‏ @saleemrash1d 22 Mar 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @marcan42

      Would you be able to have that done such that the extra 32KiB is basically "undetectable"? i.e. JTAG and memory map only goes up to 32KiB, but the system bootloader is modified to run hidden code if the "non-hidden" code is signed by Ledger.

      1 reply 0 retweets 0 likes
    5. Hector Martin‏ @marcan42 22 Mar 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @saleemrash1d @spudowiar

      Not JTAG, but it should be entirely possible to trojan the bootloader such that it accepts legitimate firmware updates over USB, stores them, but still runs the old modified code (or even dynamically patches the new code, if it hasn't changed much).

      1 reply 0 retweets 0 likes
      Hector Martin‏ @marcan42 22 Mar 2018
      • Report Tweet
      • Report NetzDG Violation
      Replying to @marcan42 @spudowiar

      This is a very old war to fight (and lose); this kind of thing and similar techniques have been going on for ages with hacked pay TV cards and the like. It's a cat and mouse game. Even with 32K you can always find a way to make some space and hide it.

      1:51 PM - 22 Mar 2018
      • 1 Like
      • Karel 3.2 Gen 2x1
      0 replies 0 retweets 1 like

      Loading seems to be taking a while.

      Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.

        Promoted Tweet

        false

        • © 2021 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Imprint
        • Cookies
        • Ads info