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jonasLyk's profile
Jonas L
Jonas L
Jonas L
@jonasLyk

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Jonas L

@jonasLyk

viking @the_secret_club

Joined February 2015

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    1. Alisa Esage Шевченко‏Verified account @alisaesage 9 Sep 2020

      Alisa Esage Шевченко Retweeted Alisa Esage Шевченко

      Local EoP within host/guest OS is one of the lesser known attack vectors in the virtualization systems’ threat model. Vulns like that one are actually quite common, although usually it’s classical memory corruptions in the hypervisor r0 drivers rather than systemwide logic issueshttps://twitter.com/alisaesage/status/1303362581583732736 …

      Alisa Esage Шевченко added,

      Alisa Esage ШевченкоVerified account @alisaesage
      Replying to @alisaesage @wdormann
      I have a hypothesis that in this case Microsoft fell victim to its own namespace model that allows multiple ways of accessing the same object while not enforcing a centralized privilege separation model. I recall similar bugs (not in Hyper-V), kind of directory traversal gone MS
      1 reply 12 retweets 29 likes
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    2. Alisa Esage Шевченко‏Verified account @alisaesage 9 Sep 2020

      And by the way, of all modern virtualization systems Hyper-V has the widest attack surface in the kernel space (of which storvsp.sys is just one module), which MS guys don’t usually accentuate in their Hyper-V research blogs for some reason

      1 reply 7 retweets 21 likes
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    3. Jonas L‏ @jonasLyk 9 Sep 2020
      Replying to @alisaesage

      when patched you get to see how to do file operations on hyper-v host hd from guest container os

      1 reply 0 retweets 0 likes
      Jonas L‏ @jonasLyk 9 Sep 2020
      Replying to @jonasLyk @alisaesage

      only 20 k bounty- i have no idea why, but ms ipc always ruins my mood so havent asked

      7:59 AM - 9 Sep 2020
      • 1 Like
      • Testman
      0 replies 0 retweets 1 like

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