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submitted 5 months ago* (last edited 5 months ago) by Aatube@kbin.melroy.org to c/technology@lemmy.world

…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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[-] independantiste@sh.itjust.works 397 points 5 months ago* (last edited 5 months ago)

Every affected company should be extremely thankful that this was an accidental bug, because if crowdstrike gets hacked, it means the bad actors could basically ransom I don't know how many millions of computers overnight

Not to mention that crowdstrike will now be a massive target from hackers trying to do exactly this

[-] Evotech@lemmy.world 223 points 5 months ago
[-] planish@sh.itjust.works 86 points 5 months ago
[-] SomethingBurger@jlai.lu 53 points 5 months ago

New vulnerability just dropped

[-] peopleproblems@lemmy.world 22 points 5 months ago

Oooooooo this one again thank you for reminding me

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[-] qprimed@lemmy.ml 81 points 5 months ago

security as a service is about to cost the world a pretty penny.

[-] Telorand@reddthat.com 86 points 5 months ago

You mean it's going to cost corporations a pretty penny. Which means they'll pass those "costs of operation" on to the rest of us. Fuck.

[-] qprimed@lemmy.ml 32 points 5 months ago* (last edited 5 months ago)

well, the world does include the rest of us.

and its not just opeerational costs. what happens when an outage lasts 3+ days and affects all communication and travel? thats another massive shock to the system.

they come faster and faster.

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[-] echodot@feddit.uk 36 points 5 months ago

On Monday I will once again be raising the point of not automatically updating software. Just because it's being updated does not mean it's better and does not mean we should be running it on production servers.

Of course they won't listen to me but at least it's been brought up.

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[-] helpImTrappedOnline@lemmy.world 30 points 5 months ago* (last edited 5 months ago)

I've got a feeling crowdstrike won't be as grand of target anymore. They're sure to lose a lot of clients...at least until they spin up a new name and erease all traces of "crowdstrike".

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[-] billwashere@lemmy.world 20 points 5 months ago

Third parties being able to push updates to production machines without being tested first is giant red flag for me. We’re human … we fuck up. I understand that. But that’s why you test things first.

I don’t trust myself without double checking, so why would we completely trust a third party so completely.

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[-] bjoern_tantau@swg-empire.de 240 points 5 months ago

Ah, a classic off by 43,008 zeroes error.

[-] diffusive@lemmy.world 152 points 5 months ago

If I had to bet my money, a bad machine with corrupted memory pushed the file at a very final stage of the release.

The astonishing fact is that for a security software I would expect all files being verified against a signature (that would have prevented this issue and some kinds of attacks

[-] BossDj@lemm.ee 51 points 5 months ago

So here's my uneducated question: Don't huge software companies like this usually do updates in "rollouts" to a small portion of users (companies) at a time?

[-] Dashi@lemmy.world 35 points 5 months ago

I mean yes, but one of the issuess with "state of the art av" is they are trying to roll out updates faster than bad actors can push out code to exploit discovered vulnerabilities.

The code/config/software push may have worked on some test systems but MS is always changing things too.

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[-] umbrella@lemmy.ml 28 points 5 months ago

the smart ones probably do

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[-] LodeMike@lemmy.today 51 points 5 months ago

Which is still unacceptable.

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[-] tofubl@discuss.tchncs.de 117 points 5 months ago

This file compresses so well. 🤏

[-] some_guy 109 points 5 months ago

If it had been all ones this could have been avoided.

[-] jj4211@lemmy.world 57 points 5 months ago

Just needed to add 42k of ones to balance the data. Everyone knows that, like tires, you need to balance your data.

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[-] EleventhHour@lemmy.world 68 points 5 months ago* (last edited 5 months ago)
d'00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000 00000000 00000000!
[-] jj4211@lemmy.world 23 points 5 months ago* (last edited 5 months ago)

Damnit you're comment just crashed the rest of the computers that were still up.

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[-] filister@lemmy.world 44 points 5 months ago

Imagine the world if those companies were using Atomic distribution and the only thing you would need to do is to boot the previous good image.

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[-] Socsa@sh.itjust.works 37 points 5 months ago

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.

[-] OutsizedWalrus@lemmy.world 50 points 5 months ago

I’m not sure why you think this statement is so profound.

CrowdStrike is expected to have kernel level access to operate correctly. Kernel level exceptions cause these types of errors.

Windows handles exceptions just fine when code is run in user space.

This is how nearly all computers operate.

[-] Dark_Arc@social.packetloss.gg 35 points 5 months ago

This is a pretty hot take. A single bad file can topple pretty much any operating system depending on what the file is. That's part of why it's important to be able to detect file corruption in a mission critical system.

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[-] phx@lemmy.ca 24 points 5 months ago

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...

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[-] areyouevenreal@lemm.ee 23 points 5 months ago

Yeah pretty much all security products need kernel level access unfortunately. The Linux ones including crowdstrike and also the Open Source tools SELinux and AppArmor all need some kind of kernel module in order to work.

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[-] cupcakezealot@lemmy.blahaj.zone 25 points 5 months ago

have they ruled out any possibility of a man in the middle attack by a foreign actor?

[-] simplejack@lemmy.world 62 points 5 months ago

This was not a cyberattack.

https://www.crowdstrike.com/blog/statement-on-falcon-content-update-for-windows-hosts/

I guess they could be lying, but if they were lying, I don’t know if their argument of “we’re incompetent” is instilling more trust in them.

[-] xavier666@lemm.ee 30 points 5 months ago

"We are confident that only our engineers can fuck up so much, instead of our competitors"

[-] floofloof@lemmy.ca 53 points 5 months ago

The CEO made a statement to the effect of "It's not an attack, it's just me and my company being shockingly incompetent." He didn't use exactly those words but that was the gist.

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[-] Gork@lemm.ee 22 points 5 months ago

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

[-] tiramichu@lemm.ee 212 points 5 months ago

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

[-] Gork@lemm.ee 42 points 5 months ago

Ah, makes sense. I guess a driver would completely freak out if that file gave no instructions and was just like "..."

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[-] deadbeef79000@lemmy.nz 17 points 5 months ago

Except "freak out" could have various manifestations.

In this case it was "burn down the venue".

It should have been "I'm sorry, there's been an issue, let's move on to the next speaker"

[-] Strykker@programming.dev 17 points 5 months ago

Except since it was an antivirus software the system is basically told "I must be running for you to finish booting", which does make sense as it means the antivirus can watch the system before any malicious code can get it's hooks into things.

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[-] MajinBlayze@lemmy.world 58 points 5 months ago

Because it's supposed to be something else

[-] jared@mander.xyz 35 points 5 months ago

At least a few 1's I imagine.

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this post was submitted on 19 Jul 2024
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