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wdormann's profile
Will Dormann
Will Dormann
Will Dormann
@wdormann

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Will Dormann

@wdormann

Vulnerability Analyst at the CERT/CC. My thoughts are my own, not my employer's.

Joined August 2012

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    1. Will Dormann‏ @wdormann 7 Jun 2019
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      Will Dormann Retweeted Catalin Cimpanu

      I've confirmed that this works on a fully-patched (latest May updates) Windows 10 (1809 and 1903) system. This exploit allows a normal desktop user to gain full control of a protected file.https://twitter.com/campuscodi/status/1136950963154161664 …

      Will Dormann added,

      Catalin Cimpanu @campuscodi
      SandboxEscaper details new "ByeBear" zero-day impacting Windows 10 and Server 2019. It's another bypass for the CVE-2019-0841 patch. She previously published a first bypass 2 weeks ago. https://www.zdnet.com/article/windows-10-zero-day-details-published-on-github/ … pic.twitter.com/JcCe4d14Ui
      Show this thread
      1 reply 7 retweets 24 likes
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    2. Will Dormann‏ @wdormann 7 Jun 2019
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      By default, the public exploit grants full control of c:\windows\win.ini to the current user as an example. But the target file can easily be changed to anything that the attacker wants. Something tells me this isn't the last of this sort of bug that we're going to see...pic.twitter.com/ybNScbQuXY

      3 replies 5 retweets 6 likes
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    3. Will Dormann‏ @wdormann 16 Jul 2019
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      I haven't been able to reproduce this exploit on a system that has July's updates from Microsoft. I can't find any official statement about it being patched, but honestly, I can't really navigate the Patch Tuesday pubs since they switched from "MS" to "CVE" IDs. Is it fixed?

      2 replies 1 retweet 0 likes
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    4. Nate Warfield‏ @n0x08 16 Jul 2019
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      Replying to @wdormann

      https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1129 … addressed this vulnerability.

      1 reply 0 retweets 2 likes
    5. Will Dormann‏ @wdormann 16 Jul 2019
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      Replying to @n0x08

      Thanks! I don't see CVE-2019-1129 in what I understand to be a summary of July's updates https://portal.msrc.microsoft.com/en-us/security-guidance/releasenotedetail/48293f19-d662-e911-a98e-000d3a33c573 … though. Am I looking at the wrong summary for July's updates? Or is CVE-2019-1129 not in that list for other intentional reasons?

      1 reply 0 retweets 0 likes
    6. Nate Warfield‏ @n0x08 16 Jul 2019
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      Replying to @wdormann

      So, we state "Please note that this is not a complete list of CVEs for this release." in the release notes; those CVE's are the ones with additional details/steps required. Using the portal, you can filter for Product: Server 2019 and Impact: EOP and it'll be in that list.

      2 replies 0 retweets 0 likes
      Will Dormann‏ @wdormann 16 Jul 2019
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      Replying to @n0x08

      Thanks. What's the recommended way to get a simple list of all the updates for any given month's Patch Tuesday release? That page I found via a web search clearly wasn't what I was looking for.

      11:54 AM - 16 Jul 2019
      4 replies 0 retweets 0 likes
        1. New conversation
        2. Dustin is Social Distancing‏ @dustin_childs 16 Jul 2019
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          Replying to @wdormann @n0x08

          I do what I can. Check out this month's blog athttps://www.zerodayinitiative.com/blog/2019/7/9/the-july-2019-security-update-review …

          1 reply 0 retweets 2 likes
        3. Nate Warfield‏ @n0x08 16 Jul 2019
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          Replying to @dustin_childs @wdormann

          +1 for Dustin's monthly analysis & it's my personal favorite. https://github.com/microsoft/MSRC-Microsoft-Security-Updates-API … - if you want to write your own this will help get you started.

          1 reply 0 retweets 0 likes
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        1. regnil‏ @regnil 16 Jul 2019
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          Replying to @wdormann @n0x08

          i've been parsing this xml: curl -s -H 'Accept: application/xml' -H "api-key: ${MSFT_APIKEY:?}" "https://api.msrc.microsoft.com/cvrf/ ${year}-${month}?api-version=2019"

          0 replies 0 retweets 2 likes
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        1. Nate Warfield‏ @n0x08 16 Jul 2019
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          Replying to @wdormann

          @msftsecresponse tweets a link each Patch Tuesday morning with details on that months release; that’s probably the best place to start. We’ve got an API and I know there’s a PowerShell script floating around to generate reports similar to the old bulletins.

          0 replies 0 retweets 1 like
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        1. Nate Warfield‏ @n0x08 16 Jul 2019
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          Replying to @wdormann

          https://portal.msrc.microsoft.com/en-us/security-guidance/summary … - this is another good start

          0 replies 0 retweets 0 likes
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