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CrowdStrike downtime apparently caused by update that replaced a file with 42kb of zeroes (twiiit.com)

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

190 comments fedilink hide all child comments

…according to a Twitter post by the Chief Informational Security Officer of Grand Canyon Education.

So, does anyone else find it odd that the file that caused everything CrowdStrike to freak out, C-00000291-
00000000-00000032.sys was 42KB of blank/null values, while the replacement file C-00000291-00000000-
00000.033.sys was 35KB and looked like a normal, if not obfuscated sys/.conf file?

Also, apparently CrowdStrike had at least 5 hours to work on the problem between the time it was discovered and the time it was fixed.

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[–] [email protected] 22 points 3 months ago (62 children)

How can all of those zeroes cause a major OS crash?

[–] [email protected] 212 points 3 months ago (46 children)

If I send you on stage at the Olympic Games opening ceremony with a sealed envelope

And I say "This contains your script, just open it and read it"

And then when you open it, the script is blank

You're gonna freak out

[–] [email protected] 7 points 3 months ago

This guy ELI5s

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