Technology

58123 readers

3890 users here now

This is a most excellent place for technology news and articles.

Our Rules

Follow the lemmy.world rules.
Only tech related content.
Be excellent to each another!
Mod approved content bots can post up to 10 articles per day.
Threads asking for personal tech support may be deleted.
Politics threads may be removed.
No memes allowed as posts, OK to post as comments.
Only approved bots from the list below, to ask if your bot can be added please contact us.
Check for duplicates before posting, duplicates may be removed

Approved Bots

founded 1 year ago

MODERATORS

830

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

submitted 2 months ago* (last edited 2 months ago) by [email protected] to c/technology

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.

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 9 points 2 months ago

A page fault can be what triggers a catch, but you can't unwind what a loaded module (the Crowdstrike driver) did before it crashed. It could have messed with Windows kernel internals and left them in a state that is not safe to continue. Rather than potentially damage the system, Windows stops with a BSOD. The only solution would be to not allow code to be loaded into the kernel at all, but that would make hardware drivers basically impossible.