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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

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    Tavis Ormandy‏Verified account @taviso Jan 14
    • Report Tweet

    Tavis Ormandy Retweeted Will Dormann

    Will confirms all X.509 validation broken, not just code signing. Okay, I'm back on the hype train, that's pretty bad.https://twitter.com/wdormann/status/1217144867173912582 …

    Tavis Ormandy added,

    Will Dormann @wdormann
    Replying to @FiloSottile @kennwhite @taviso
    Indeed I am.
    10:06 AM - 14 Jan 2020
    • 406 Retweets
    • 864 Likes
    • Levi L0C4LH057 Adi Dan Taylor Rob Moore der Sven Hendrik L Andrea Monzani James
    20 replies 406 retweets 864 likes
      1. New conversation
      2. Dan Goodin‏ @dangoodin001 Jan 14
        • Report Tweet
        Replying to @taviso

        Any thoughts on why Microsoft rates it as important and not critical.

        3 replies 0 retweets 17 likes
      3. Tavis Ormandy‏Verified account @taviso Jan 14
        • Report Tweet
        Replying to @dangoodin001

        It seems consistent with their scale, it means https is broken, not iis remote shell. Still, if you can't make exceptions for things like this, then maybe the scale is broken.

        1 reply 1 retweet 38 likes
      4. 4 more replies
      1. New conversation
      2. Jonathan Leitschuh → ShmooCon‏ @JLLeitschuh Jan 14
        • Report Tweet
        Replying to @taviso

        The implications here are TLS certificate verification bypassing thus enabling a MITM? Or am I missing something?

        1 reply 0 retweets 3 likes
      3. Wes‏ @weskerfoot Jan 14
        • Report Tweet
        Replying to @JLLeitschuh @taviso

        Yes, or any other way you want to tamper with code signing, etc. Anything that relies on certificate chains being valid.

        0 replies 2 retweets 6 likes
      4. End of conversation
      1. Ug_0 Security‏ @Ug_0Security Jan 14
        • Report Tweet
        Replying to @taviso

        i.. am.. confused..pic.twitter.com/0VwhKqlZw7

        0 replies 0 retweets 7 likes
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      1. Rob Rosenberger‏ @vmyths Jan 14
        • Report Tweet
        Replying to @taviso @briankrebs

        https://youtu.be/Z0GFRcFm-aY 

        0 replies 1 retweet 3 likes
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      1. Maik Musall‏ @maikm Jan 14
        • Report Tweet
        Replying to @taviso

        That is some first class timing right after Win7 no longer receiving updates.

        0 replies 0 retweets 8 likes
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      1. Fotis‏ @fotisl Jan 15
        • Report Tweet
        Replying to @taviso

        From https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0601 … : "A successful exploit could also allow the attacker to conduct man-in-the-middle attacks and decrypt confidential information on user connections to the affected software."

        0 replies 1 retweet 3 likes
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      1. New conversation
      2. (ca)sey‏ @verbumrosini Jan 14
        • Report Tweet
        Replying to @taviso

        https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2020-0601 …

        2 replies 0 retweets 5 likes
      3. ⬡liver‏ @OVollmer Jan 14
        • Report Tweet
        Replying to @verbumrosini @taviso

        Lol the MSRC site must be overloaded right now, it's taking forever to load

        0 replies 0 retweets 1 like
      4. End of conversation

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