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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

Tweets

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    1. Stefan Esser‏Verified account @i0n1c Jan 7
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      Stefan Esser Retweeted Stefan Esser

      I wonder if this increases the value of patch diffing results. Because P0 will not disclose what the bugs are for a long time which automatically makes patch diffing more attractive 😂https://twitter.com/i0n1c/status/1214621661099646989 …

      Stefan Esser added,

      Stefan EsserVerified account @i0n1c
      So the new P0 policy is to disclose details only after 90 days even if vendor releases the patch after 20 days. That means people will wait for 70 days before patching because nobody tells them what the bug exactly is and if it is really worth patching 🤷🏻‍♂️
      4 replies 17 retweets 31 likes
    2. Tavis Ormandy‏Verified account @taviso Jan 7
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      Replying to @i0n1c

      Yep, disappointing move by Google.

      1 reply 1 retweet 12 likes
    3. Richard Johnson‏ @richinseattle Jan 7
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      Replying to @taviso @i0n1c

      According to @epakskape data from BluehatIL, almost no exploits for a vuln discovered in the 30 days after a patch is available. It doesn’t extend to what the average timeline is for the cases that see an exploit. Obviously we don’t have perfect info, just a data point.

      2 replies 0 retweets 4 likes
    4. Tavis Ormandy‏Verified account @taviso Jan 7
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      Replying to @richinseattle @i0n1c @epakskape

      Sure, pretty useless data point though, why would you invest in building an exploit just to share it with Microsoft.

      1 reply 0 retweets 3 likes
    5. Richard Johnson‏ @richinseattle Jan 7
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      Replying to @taviso @i0n1c @epakskape

      Presumably you invest in an exploit to use it and it becomes observed.

      2 replies 0 retweets 1 like
    6. Stefan Esser‏Verified account @i0n1c Jan 7
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      Replying to @richinseattle @taviso @epakskape

      I think we all know how good Microsoft was in observing a certain NSA exploit that they had for years 😂

      1 reply 0 retweets 3 likes
    7. Richard Johnson‏ @richinseattle Jan 7
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      Replying to @i0n1c @taviso @epakskape

      These are triaged and patched bugs, likely with detections from network, host, or watson.

      1 reply 0 retweets 1 like
    8. Tavis Ormandy‏Verified account @taviso Jan 7
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      Replying to @richinseattle @i0n1c @epakskape

      Why would watson be relevant, the purpose of an exploit isn't to crash.

      1 reply 0 retweets 2 likes
    9. Richard Johnson‏ @richinseattle Jan 7
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      Replying to @taviso @i0n1c @epakskape

      So you agree with the other two. Watson is relevant because not everyone is perfect at exploit dev and preventing broken exploits from phoning home crash dumps.

      1 reply 0 retweets 2 likes
      Tavis Ormandy‏Verified account @taviso Jan 7
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      Replying to @richinseattle @i0n1c @epakskape

      Obviously I don't agree, if we could detect unknown exploits then we could all just go home and call security done. Also, all attempts at mining crash reports for exploits that I'm aware of have proven unhelpful.

      11:33 AM - 7 Jan 2020
      • 4 Likes
      • cc twiz Jeff McJunkin Christopher McNeil 🇨🇦
      1 reply 0 retweets 4 likes
        1. New conversation
        2. Jeff McJunkin‏ @jeffmcjunkin Jan 7
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          Replying to @taviso @richinseattle and

          Once there's something to pivot on, having a pile of crash reports helps find failed exploits, which helps vuln discovery/patching. Example w/ struggle: https://github.com/JohnLaTwC/Shared/blob/master/The%20Inside%20Story%20Behind%20MS08-067.md … Key quote: "On September 25th a crash came in that got my attention--an exploit in netapi32.dll"

          1 reply 0 retweets 1 like
        3. Tavis Ormandy‏Verified account @taviso Jan 7
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          Replying to @jeffmcjunkin @richinseattle and

          I don't claim there are zero counterexamples, I claim that in general it is not helpful. I've researched this extensively, and believe Microsoft has as well, and came to the same conclusion.

          2 replies 0 retweets 7 likes
        4. 1 more reply

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