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.

This is the legacy version of twitter.com. We will be shutting it down on June 1, 2020. Please switch to a supported browser, or disable the extension which masks your browser. You can see a list of supported browsers in our Help Center.

  • 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
wdormann's profile
Will Dormann
Will Dormann
Will Dormann
@wdormann

Tweets

Will Dormann

@wdormann

Vulnerability Analyst at the CERT/CC. My thoughts are my own, not my employer's.

Joined August 2012

Tweets

  • © 2020 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. Haifei Li‏ @HaifeiLi 14 Apr 2019
      • Report Tweet
      • Report NetzDG Violation

      Haifei Li Retweeted Will Dormann

      I think the key here prob. is the attack vector - MSRC prob. think “double-clicking on a non-MOTW local mht file” isn’t a valid vector, as there maybe bigger/known problems if you open non-MOTW mht file locally with IE.https://twitter.com/wdormann/status/1116691419673047042 …

      Haifei Li added,

      Will Dormann @wdormann
      Confirmed on a fully-patched Windows 10 system. But keep in mind that XXE cannot be used to obtain binary files, as far as I'm aware. Just text. https://twitter.com/campuscodi/status/1116624440681304064 …
      2 replies 0 retweets 10 likes
      Show this thread
    2. Will Dormann‏ @wdormann 14 Apr 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @HaifeiLi

      I'd have to double check, but I don't recall the MoTW coming in to play when I reproduced it.

      1 reply 0 retweets 1 like
    3. Will Dormann‏ @wdormann 15 Apr 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @wdormann @HaifeiLi

      Yeah, the MoTW doesn't matter. ZoneID=3 means "internet zone" And perhaps not-surprisingly, IE will open web pages from the internet zone without prompting.pic.twitter.com/J5heQgZzhX

      1 reply 0 retweets 1 like
    4. Haifei Li‏ @HaifeiLi 15 Apr 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @wdormann

      Okay, that's weird.. I just got a test (didn't actually test yesterday). The weird thing is that I found that on Windows 10 the MoTW is a NOT vector (same as ur test), but on Windows 7 it is - if MoTW, then only the datatears.xml will be downloaded but no system.ini leaking.

      2 replies 0 retweets 1 like
    5. Will Dormann‏ @wdormann 15 Apr 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @HaifeiLi

      Yes, with Windows 7 and Windows 8, the MoTW appears to prevent the data from being sent to the attacker. With Windows 10, the MoTW makes no difference. Conclusion: In this particular case, Windows 10 is worse off than prior versions of Windows.

      1 reply 0 retweets 1 like
    6. Haifei Li‏ @HaifeiLi 15 Apr 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @wdormann

      Hmmm, wait.. even more weird.. I just tested on another one of my Windows 10 box, the MoTW is a vector on that machine - no system.ini leak only datatears.xml access... It seems that the conclusion is still far to be made.

      1 reply 0 retweets 0 likes
    7. Mitja Kolsek‏ @mkolsek 15 Apr 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @HaifeiLi @wdormann

      Guys, I may be able to clear this up a little. It seems that Edge puts two additional ACL entries to the saved file, both with undocumented SIDs, one of which prevents Low Integrity processes from accessing the file. I guess some undocumented feature...

      2 replies 1 retweet 3 likes
      Will Dormann‏ @wdormann 15 Apr 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @mkolsek @HaifeiLi

      Indeed! The ACLs for the Edge-downloaded MHT file do have extra SIDs listed. If the same file is downloaded with IE, Chrome, or Firefox, there are no strange SIDs, and the MHT exploit won't exfiltrate text files. Hmmm...pic.twitter.com/Te3ksK0x4q

      1:50 PM - 15 Apr 2019
      • 2 Likes
      • hex waxwing :(){ :|: &};: Mitja Kolsek
      2 replies 0 retweets 2 likes
        1. New conversation
        2. Haifei Li‏ @HaifeiLi 15 Apr 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @wdormann @mkolsek

          Wow! I just also confirmed this! You've gone so wild, Edge! (Thanks @mkolsek for this finding).

          3 replies 0 retweets 1 like
        3. Haifei Li‏ @HaifeiLi 15 Apr 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @HaifeiLi @wdormann @mkolsek

          Now I recall that the only time it worked is I used Edge to download the mht file.. Who thought it could be different, hmm..

          0 replies 0 retweets 1 like
        4. End of conversation
        1. New conversation
        2. Mitja Kolsek‏ @mkolsek 15 Apr 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @wdormann @HaifeiLi

          Now remove the S-1-15-2 ACL and see that the exploit stops working :)

          1 reply 0 retweets 0 likes
        3. Will Dormann‏ @wdormann 15 Apr 2019
          • Report Tweet
          • Report NetzDG Violation
          Replying to @mkolsek @HaifeiLi

          Important question: Are there programs other than IE that run with low integrity on Windows? It would any such application will not benefit from any MoTW marking.

          1 reply 0 retweets 1 like
        4. 9 more replies

      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

        • © 2020 Twitter
        • About
        • Help Center
        • Terms
        • Privacy policy
        • Imprint
        • Cookies
        • Ads info