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

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Tavis OrmandyVerified account

@taviso

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

California
taviso.decsystem.org
Joined April 2008

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    Tavis Ormandy‏Verified account @taviso 30 Apr 2019
    • Report Tweet
    • Report NetzDG Violation

    LOL, I spent weeks reversing the SymCrypt libraries, and then Microsoft open sources the code 🤣 Well, at least I can annotate my bug reports now... 🐞

    7:39 PM - 30 Apr 2019
    • 85 Retweets
    • 969 Likes
    • Lochan Omkar_Bhosale J-roq Bjoern Doebel Jack Keeley Clint Wilson 𝒜𝒽𝓂𝑒𝒹 𝒜𝒷𝒹 𝐸𝓁 𝑀𝒶𝓌𝑔𝑜𝑜𝒹 AnormalGuy Dennis-Mutuma Gikuyu
    13 replies 85 retweets 969 likes
      1. New conversation
      2. Myria‏ @Myriachan 30 Apr 2019
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        Replying to @taviso

        Is SymCrypt part of cng.sys/bcrypt.dll? Or are they separate?

        1 reply 0 retweets 0 likes
      3. Tavis Ormandy‏Verified account @taviso 1 May 2019
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        Replying to @Myriachan

        Yep, part of bcrypt/bcryptprimitives, mostly bigint and mpi routines.

        0 replies 0 retweets 5 likes
      4. End of conversation
      1. thaddeus e. grugq‏ @thegrugq 1 May 2019
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        • Report NetzDG Violation
        Replying to @taviso

        “I reversed SymCrypt for a year and they just…opensourced and tweeted it out. “Like. I spent hours and days and weeks. And they just did git push, and hit tweet “I tracked down data structures. Chased obfuscations. I labored over this, and they, just you know, tweeted the source

        0 replies 2 retweets 33 likes
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      1. CONDITION.BLACK RESEARCH‏ @Shadow0pz 30 Apr 2019
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        Replying to @taviso

        But did you find the side channel bug?pic.twitter.com/W5DrpFOllu

        0 replies 0 retweets 5 likes
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      1. Simon Waters‏ @SimonRWaters 1 May 2019
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        Replying to @taviso

        I spent a week writing an implementation of Google's old widget framework so we could reuse widgets across Google and our own website hosting, and the day I finished they released version 2 of the spec. All long forgotten now.

        0 replies 0 retweets 5 likes
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      1. New conversation
      2. Yuhong Bao‏ @yuhong2 30 Apr 2019
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        • Report NetzDG Violation
        Replying to @taviso

        I reported a non-security bug in BOOTMGR related to XSAVE two years ago.

        1 reply 0 retweets 1 like
      3. Yuhong Bao‏ @yuhong2 30 Apr 2019
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        Replying to @yuhong2 @taviso

        What is fun is that I can easily can tell from disassembly that it never actually uses AVX instructions.

        0 replies 0 retweets 3 likes
      4. End of conversation
      1. gary2271  🐝 🐝 🎙️‏ @jayzengland 30 Apr 2019
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        Replying to @taviso

        my sympathys tavis!!

        0 replies 0 retweets 1 like
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