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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. Kevin Beaumont‏Verified account @GossiTheDog 15 Nov 2017
      • Report Tweet
      • Report NetzDG Violation

      There’s a big difference between Microsoft’s statements about CVE-2017-11882 (Office exploit) vs the reporters. The reporters claim they have an exploit, Microsoft say no exploit. MS only say Important, reporters say no prompt RCE.

      5 replies 20 retweets 53 likes
      Show this thread
    2. Kevin Beaumont‏Verified account @GossiTheDog 15 Nov 2017
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      Kevin Beaumont Retweeted

      I call on @_embedi_ to release the proof of concept so we can make a more informed assessment https://twitter.com/_embedi_/status/930498911676108801 …

      Kevin Beaumont added,

      This Tweet is unavailable.
      2 replies 8 retweets 33 likes
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    3. Kevin Beaumont‏Verified account @GossiTheDog 16 Nov 2017
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      I am continuing to investigate this issue. MS rank patch as Important and say exploitation unlikely, in spirit of cooperation - rate it higher in your orgs and deploy it, exploitation is going to be highly likely it appears.

      3 replies 3 retweets 16 likes
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    4. Kevin Beaumont‏Verified account @GossiTheDog 20 Nov 2017
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      I can independently confirm that CVE-2017-11882 (OLE Equation Editor) is real. I've tried it against Office 2007, 2010, 2013 and 2016 successfully across Windows 7, 10 and Windows Server 2016. 100% reliable code execution. Patch it.pic.twitter.com/9Wks0y2gBG

      4 replies 141 retweets 211 likes
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    5. Will Dormann‏ @wdormann 20 Nov 2017
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      Replying to @GossiTheDog

      Any system with system-wide mandatory ASLR enabled (and bottom-up ASLR if you're on Windows 8 or newer) would have already been protected against this exploit.

      3 replies 1 retweet 3 likes
    6. Kevin Beaumont‏Verified account @GossiTheDog 20 Nov 2017
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      Replying to @wdormann

      that screenshot is Windows Server 2016, it doesn't stop it

      1 reply 0 retweets 2 likes
    7. Will Dormann‏ @wdormann 20 Nov 2017
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      Replying to @GossiTheDog

      I suspect you didn't have system-wide ASLR properly enabled.

      2 replies 0 retweets 2 likes
    8. This Tweet is unavailable.
    9. Will Dormann‏ @wdormann 20 Nov 2017
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      Replying to @4Dgifts @GossiTheDog

      I suspect that most people don't have it properly enabled as well. People that care about blocking exploits should have already had mandatory ASLR enabled. Up until recently, though, people who thought they were enabling it on Win8+ probably weren't doing so properly.

      1 reply 2 retweets 2 likes
    10. Kevin Beaumont‏Verified account @GossiTheDog 20 Nov 2017
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      Replying to @wdormann @4Dgifts

      I can't figure out how to enable it on Windows Server 2016.

      1 reply 0 retweets 0 likes
      Will Dormann‏ @wdormann 20 Nov 2017
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      Replying to @GossiTheDog @4Dgifts

      You've read https://www.kb.cert.org/vuls/id/817544  ? Imported the registry file? If that didn't do it, let me know...

      10:49 AM - 20 Nov 2017
      2 replies 0 retweets 0 likes
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        2. Kevin Beaumont‏Verified account @GossiTheDog 20 Nov 2017
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          Replying to @wdormann @4Dgifts

          Confirmed - this works well, stops exploit. However it broke some crap 90s app on my server, Delphi FTW :D

          1 reply 0 retweets 2 likes
        3. Will Dormann‏ @wdormann 20 Nov 2017
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          Replying to @GossiTheDog @4Dgifts

          It's a good way to flush out crap that shouldn't be on your system in the first place! :)

          2 replies 0 retweets 0 likes
        4. 1 more reply
        1. {0x41}‏ @tagnullde 20 Nov 2017
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          Replying to @wdormann @GossiTheDog @4Dgifts

          I did that just this morning. So, thank you for finding and reporting that!

          0 replies 0 retweets 1 like
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