Skip to content
  • Home Home Home, current page.
  • Moments Moments Moments, current page.

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

Tweets

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

Tweets

  • © 2018 Twitter
  • About
  • Help Center
  • Terms
  • Privacy policy
  • 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. Matthew Garrett‏ @mjg59 20 Nov 2017

      Thoughts on the latest Intel ME vulnerabilities: based on public information, we have no real idea how serious this is yet. It could be fairly harmless, it could be a giant deal.

      6 replies 160 retweets 224 likes
      Show this thread
    2. Matthew Garrett‏ @mjg59 20 Nov 2017

      There's two classes of vulnerability disclosed. One is in the Intel AMT component, which runs on ME and is restricted to "enterprise" hardware (which includes higher end laptops), the other is arbitrary ME execution and applies to the entire product range.

      3 replies 11 retweets 21 likes
      Show this thread
    3. Matthew Garrett‏ @mjg59 20 Nov 2017

      The AMT vulnerabilities "only" permit code execution in the context of AMT. That means at least all the capabilities of AMT, but potentially more besides.

      1 reply 2 retweets 13 likes
      Show this thread
    4. Matthew Garrett‏ @mjg59 20 Nov 2017

      One of AMT's features is allowing a user to VNC into a system without the OS being involved. Doing this draws a warning border around the screen to alert the user. Unclear whether that's hardware or not - if not, this could allow silent observation of affected systems.

      3 replies 6 retweets 27 likes
      Show this thread
    5. Matthew Garrett‏ @mjg59 20 Nov 2017

      AMT also allows secure boot to be disabled for one-shot boots, so AMT compromise is probably also a complete secure boot compromise

      1 reply 6 retweets 17 likes
      Show this thread
    6. Matthew Garrett‏ @mjg59 20 Nov 2017

      Worth noting - this gives *remote* users the opportunity to execute code as AMT if they authenticate. https://www.intel.com/content/www/us/en/architecture-and-technology/intel-amt-vulnerability-announcement.html … allows you to authenticate with an empty authentication token. If you haven't patched that already, do so.

      1 reply 22 retweets 47 likes
      Show this thread
    7. Matthew Garrett‏ @mjg59 20 Nov 2017

      The ME compromise presumably gives you everything the AMT compromise gives you, plus more. If you compromise the ME kernel you compromise everything on the ME. That includes AMT, but it also includes PTT.

      2 replies 4 retweets 12 likes
      Show this thread
    8. Matthew Garrett‏ @mjg59 20 Nov 2017

      PTT is Intel's "Run a TPM in software on the ME" feature. If you're using PTT and someone compromises your ME, the TPM is no longer trustworthy. That probably means your Bitlocker keys are compromised, but it also means all your remote attestation credentials are toast.

      2 replies 6 retweets 25 likes
      Show this thread
    9. Matthew Garrett‏ @mjg59 20 Nov 2017

      Worst case there is that an attacker is able to obtain the EK credentials from PTT. Unless there's a way to generate a new EK (and a new EK certificate), you can no longer ever trust remote attestation from that system.

      2 replies 2 retweets 11 likes
      Show this thread
      Rich Felker‏ @RichFelker 21 Nov 2017
      Replying to @mjg59

      This seems like a feature not a bug. It means you can bypass DRM based on remote attestation.

      6:39 PM - 21 Nov 2017
      1 reply 0 retweets 0 likes
        1. Matthew Garrett‏ @mjg59 21 Nov 2017
          Replying to @RichFelker

          I've never seen DRM-oriented remote attestation, but I've deployed it for various real security setups

          0 replies 1 retweet 0 likes
          Thanks. Twitter will use this to make your timeline better. Undo
          Undo

      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

        • © 2018 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Cookies
        • Ads info