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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. Jonas L‏ @jonasLyk 10 Oct 2020

      Normally all my posts are security related...but ima make an exception. Why havent anybody told me this exists? c:\Program Files\Common Files\microsoft shared\ink\fsdefinitions\osknumpad\mip.exepic.twitter.com/fsxcfwrqPU

      4 replies 9 retweets 85 likes
    2. James Gallagher‏ @james1052 11 Oct 2020
      Replying to @jonasLyk

      While we're off topic, the other day I learned that Microsoft has reserved filenames. If you try to create a file named "con" it won't let you. 14 years in tech and then a TIL moment.

      1 reply 0 retweets 2 likes
    3. Jonas L‏ @jonasLyk 11 Oct 2020
      Replying to @james1052

      yarh- there is many, mr. foreshaw did an article about the topic https://googleprojectzero.blogspot.com/2016/02/the-definitive-guide-on-win32-to-nt.html …

      1 reply 0 retweets 4 likes
    4. James Gallagher‏ @james1052 11 Oct 2020
      Replying to @jonasLyk

      Been trying to think of any security ramifications. Like could I upload a file named con to a webapp and cause unexpected behavior?

      1 reply 0 retweets 0 likes
    5. Jonas L‏ @jonasLyk 12 Oct 2020
      Replying to @james1052

      You can easily check if IIS do leaky error messages to remote hosts by requesting con: https://outlook.live.com/nul : you can override its behavior with per luid device maps I also use it to delete an running file

      1 reply 0 retweets 2 likes
    6. p0358‏ @p0358 14 Oct 2020
      Replying to @jonasLyk @james1052

      By renaming to that?

      1 reply 0 retweets 0 likes
    7. Jonas L‏ @jonasLyk 14 Oct 2020
      Replying to @p0358

      pic.twitter.com/ZrZMMxZdEf

      1 reply 0 retweets 0 likes
    8. p0358‏ @p0358 14 Oct 2020
      Replying to @jonasLyk @james1052

      Woah, interesting that it even appears on Microsoft’s own pages, with the generic default error page. What about using these names to delete opened files? Because that sounds like something that could be really useful

      1 reply 0 retweets 0 likes
      Jonas L‏ @jonasLyk 14 Oct 2020
      Replying to @p0358 @james1052

      go through my old tweets, its there

      3:43 AM - 14 Oct 2020
      0 replies 0 retweets 0 likes

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