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.

For the best Twitter experience, please use Microsoft Edge, or install the Twitter app from Microsoft Store.

  • 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
johnregehr's profile
John Regehr
John Regehr
John Regehr
@johnregehr

Tweets

John Regehr

@johnregehr

he/him

john.regehr.org
Joined September 2009

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.

    John Regehr‏ @johnregehr 19 Aug 2019
    • Report Tweet

    new blog post: Write Fuzzable Code https://blog.regehr.org/archives/1687  in which I express a lack of sympathy for anti-fuzzing measures

    9:10 AM - 19 Aug 2019
    • 131 Retweets
    • 262 Likes
    • Ben Rubinstein Paulo Matos Jason Meltzer Navid Emamdoost Paul Préfontaine Aurélien Francillon Brandon Falk Markus Schirp detectivelyw
    9 replies 131 retweets 262 likes
      1. John Regehr‏ @johnregehr 19 Aug 2019
        • Report Tweet

        John Regehr Retweeted John Regehr

        this thread contains a lot of good stuff too, some of which I incorporated into the post directly or indirectly...https://twitter.com/johnregehr/status/1154888675810934784 …

        John Regehr added,

        John Regehr @johnregehr
        I'd like to do a blog post on writing fuzzable code, what did I leave out of my list? pic.twitter.com/hZ7KseXTrn
        1 reply 0 retweets 14 likes
        Show this thread
        Thanks. Twitter will use this to make your timeline better. Undo
        Undo
      1. New conversation
      2. Brendan Dolan-Gavitt‏ @moyix 20 Aug 2019
        • Report Tweet
        Replying to @johnregehr

        Partly disagree on the anti-fuzzing part – it doesn't prevent devs from using any of the techniques you talk about as alternatives or in the rest of the article. It definitely hinders helpful outsiders but it's closed source anyway so it doesn't seem like it makes a big diff?

        1 reply 0 retweets 2 likes
      3. Brendan Dolan-Gavitt‏ @moyix 20 Aug 2019
        • Report Tweet
        Replying to @moyix @johnregehr

        If you have to pick between better software dev/safer languages and anti-fuzzing then of course you should prefer the former :)

        1 reply 0 retweets 0 likes
      4. 4 more replies
      1. New conversation
      2. Sanjay‏ @tosanjayr 20 Aug 2019
        • Report Tweet
        Replying to @johnregehr

        Just a fun thought. For developers, writing a fuzzable code -> knowing about issues (specially memory bugs) -> writing more secure code anyway-> fuzzer won't find much in fuzzable code. 🤔

        1 reply 0 retweets 0 likes
      3. John Regehr‏ @johnregehr 20 Aug 2019
        • Report Tweet
        Replying to @tosanjayr

        if this happens it's a win/win!

        0 replies 0 retweets 1 like
      4. End of conversation
      1. New conversation
      2. Martin Hořeňovský‏ @horenmar_ctu 19 Aug 2019
        • Report Tweet
        Replying to @johnregehr

        I refuse to believe that this > “But I Want Fuzzing My Code to be Harder, Not Easier” is anything but a straw man. Otherwise nice article, even if some of it feels to be in the category of "easy to say, hard to do", like avoiding interpreters.

        1 reply 0 retweets 0 likes
      3. John Regehr‏ @johnregehr 19 Aug 2019
        • Report Tweet
        Replying to @horenmar_ctu

        look up anti-fuzzing, it is a thing

        1 reply 0 retweets 1 like
      4. 1 more reply
      1. New conversation
      2. Mate Soos‏ @SoosMate 19 Aug 2019
        • Report Tweet
        Replying to @johnregehr

        Good stuff! The hardest part to fuzz test is performance in my experience -- but I have gone over a lot of hurdles over the years for all the other stuff you mention. I should spend some time on perf fuzzing, but it's hard to know when one hits a bug or it's a hard SAT problem.

        1 reply 0 retweets 2 likes
      3. John Regehr‏ @johnregehr 19 Aug 2019
        • Report Tweet
        Replying to @SoosMate

        I basically never try to do random testing for performance, have never figured out how to make this work well

        1 reply 0 retweets 0 likes
      4. 2 more replies
      1. New conversation
      2. Giovanni Mascellani‏ @giomasce 19 Aug 2019
        • Report Tweet
        Replying to @johnregehr

        What would you suggest as an introduction to fuzzing for someone who doesn't know nearly anything about it? Asking for a friend...

        1 reply 0 retweets 0 likes
      3. Stefano Zacchiroli‏ @zacchiro 20 Aug 2019
        • Report Tweet
        Replying to @giomasce @johnregehr

        Ciao Gio, I haven't actually read it yet myself, but I'm very positive that Generating Software Tests by @AndreasZeller is a great primer on #fuzzing. Plus, it's interactive!https://www.fuzzingbook.org/ 

        2 replies 2 retweets 13 likes
      4. 1 more reply

    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