this post was submitted on 19 Jul 2024
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830
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] 37 points 3 months ago (19 children)

The fact that a single bad file can cause a kernel panic like this tells you everything you need to know about using this kind of integrated security product. Crowdstrike is apparently a rootkit, and windows apparently has zero execution integrity.

[–] [email protected] 24 points 3 months ago (1 children)

Security products of this nature need to be tight with the kernel in order to actually be effective (and prevent actual rootkits).

That said, the old mantra of "with great power" comes to mind...

[–] [email protected] 6 points 3 months ago* (last edited 3 months ago) (1 children)

with great power, don't lay off the testing team (force return to office or get fired ultimatums)

[–] [email protected] 2 points 3 months ago

It's fine, they've just switched to a crowd-sourced testing strategy.

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