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
taviso's profile
Tavis Ormandy
Tavis Ormandy
Tavis Ormandy
Verified account
@taviso

Tweets

Tavis OrmandyVerified account

@taviso

Vulnerability researcher at Google. This is a personal stream, opinions expressed are mine.

California
taviso.decsystem.org
Joined April 2008

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. MalwareTech‏Verified account @MalwareTechBlog Apr 1
      • Report Tweet
      • Report NetzDG Violation

      From reading the news and Twitter I just assumed someone found a Zoom RCE. Turns out, no. Bug 1: clickable links are in fact clickable Bug 2 & 3: if an attacker already has access to your machine, they can do bad things.

      10 replies 66 retweets 374 likes
    2. Tavis Ormandy‏Verified account @taviso Apr 1
      • Report Tweet
      • Report NetzDG Violation
      Replying to @MalwareTechBlog

      I think the UNC bug wasn't explained very well, but could be exploited, e.g. \\?C:\Users\taviso~1\Downloads\exploit.bat works (i.e. executes it). You can obfuscate the link, it's not earth shattering, but I think an attack here is realistic 🤷🏻‍♂️

      2 replies 11 retweets 67 likes
    3. dade‏ @0xdade Apr 1
      • Report Tweet
      • Report NetzDG Violation
      Replying to @taviso @MalwareTechBlog

      Are you saying exploit.bat executes without any secondary confirmation? Given that a lot of corporate VPNs restrict 445 egress and most of the major ISPs in the US also block 445 egress, I'm in the "way too overhyped and not really a bug in zoom, just windows being windows" camp

      3 replies 0 retweets 9 likes
    4. Tavis Ormandy‏Verified account @taviso Apr 1
      • Report Tweet
      • Report NetzDG Violation
      Replying to @0xdade @MalwareTechBlog

      Yes, I am saying that. I think this is a real bug, just very poorly explained. The NTLM vector shouldn't even have been mentioned, that just confused everyone.

      1 reply 3 retweets 17 likes
    5. dade‏ @0xdade Apr 1
      • Report Tweet
      • Report NetzDG Violation
      Replying to @taviso @MalwareTechBlog

      I tried after asking and got this popup which, I guess if we put it in http context this would be much like clicking a .exe link and Internet Explorer saying "wanna run this instead of download it?" Seems mostly like any other phishing type attack and not a zoom problem imo.pic.twitter.com/rc8CZn6FzA

      1 reply 0 retweets 3 likes
    6. Tavis Ormandy‏Verified account @taviso Apr 1
      • Report Tweet
      • Report NetzDG Violation
      Replying to @0xdade @MalwareTechBlog

      That's just MoTW, I've verified it works. No prompts required. I think someone could realistically click on that.pic.twitter.com/VwYGB5il48

      3 replies 16 retweets 47 likes
    7. dade‏ @0xdade Apr 1
      • Report Tweet
      • Report NetzDG Violation
      Replying to @taviso @MalwareTechBlog

      What's MoTW stand for in this context? I tried to use that link style with http://bit.ly \\?\C:\Users\dade\Documents\exploit.bat and it just pulls up a bitly page and 404s. I'm on Zoom 4.6.7 (18176.0301) on Win 10 19592

      2 replies 0 retweets 2 likes
    8. dade‏ @0xdade Apr 1
      • Report Tweet
      • Report NetzDG Violation
      Replying to @0xdade @taviso @MalwareTechBlog

      Anyways, I hold your opinion in high regard and do agree that your link looks quite clickable. Just wondering what's causing me to not be able to reproduce it.

      1 reply 0 retweets 3 likes
    9. Tavis Ormandy‏Verified account @taviso Apr 1
      • Report Tweet
      • Report NetzDG Violation
      Replying to @0xdade @MalwareTechBlog

      That was just a zero-width space between the URL and the path to make it look like one long URL.

      1 reply 2 retweets 16 likes
    10. dade‏ @0xdade Apr 1
      • Report Tweet
      • Report NetzDG Violation
      Replying to @taviso @MalwareTechBlog

      Ohhhh damn how did I not realize the zero width space would be so useful there. Very well done.

      1 reply 0 retweets 7 likes
      Tavis Ormandy‏Verified account @taviso Apr 1
      • Report Tweet
      • Report NetzDG Violation
      Replying to @0xdade @MalwareTechBlog

      Haha, that obfuscation trick worked on you, so no doubting 😝 You can try to copy this if twitter doesn't mangle it: http://bit.ly ​\\?\C:\Users\dade\Downloads\exploit.bat:

      6:32 PM - 1 Apr 2020
      • 2 Retweets
      • 15 Likes
      • deepcik @mikko Aj Marson Hacker Fantastic Ed Maste Femto ⚡ brian r00t folding team #258829 michael ℕ𝕦𝕝𝕝𝕤𝕥𝕣𝕚𝕟𝕘🏴‍☠️                  \x33\xc0
      2 replies 2 retweets 15 likes
        1. New conversation
        2. dade‏ @0xdade Apr 1
          • Report Tweet
          • Report NetzDG Violation
          Replying to @taviso @MalwareTechBlog

          Yup okay that replicates it. That's sneaky and awesome.

          1 reply 0 retweets 6 likes
        3. dade‏ @0xdade Apr 1
          • Report Tweet
          • Report NetzDG Violation
          Replying to @0xdade @taviso

          pic.twitter.com/0P6A7jpM2x

          1 reply 5 retweets 15 likes
        4. 8 more replies
        1. @200_okay_‏ @200_okay_ Apr 1
          • Report Tweet
          • Report NetzDG Violation
          Replying to @taviso @0xdade @MalwareTechBlog

          So they already have an exploit.bat in their Downloads? How does that get there in an attack scenario? Does it accept process plus arguments?

          0 replies 0 retweets 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

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