So as we all know on the news, the cybersecurity firm Crowdstrike Y2K’d it’s own end customers with a shoddy non-tested update.

But how does this happen? Aren’t there programming teams and check their code or pass it to a quality assurance staff to see if it bricked their own machines?

8.5 Million machines too, does that effect home users too or is it only for windows machines that have this endpoint agent installed?

Lastly, why would large firms and government institutions such as railway networks and hospitals put all their eggs in one basket? Surely chucking everything into “The Cloud (Literally just another man’s tinbox)” would be disastrous?

TLDR - Confused how this titanic tits up could happen and that 8.5 Million windows machines (POS, Desktops and servers) just packed up.

  • jemikwa@lemmy.blahaj.zone
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    3 months ago

    I want to clarify something that you hinted at in your post but I’ve seen in other posts too. This isn’t a cloud failure or remotely related to it, but a facet of a company’s security software suite causing crippling issues.

    I apologize ahead of time, when I started typing this I didn’t think it would be this long. This is pretty important to me and I feel like this can help clarify a lot of misinformation about how IT and software works in an enterprise.

    Crowdstrike is an EDR, or Endpoint Detection and Response software. Basically a fancy antivirus that isn’t file signature based but action monitoring based. Like all AVs, it receives regular definition updates around once an hour to anticipate possible threat actors using zero-day exploits. This is the part that failed, the hourly update channel pushed a bad update. Some computers escaped unscathed because they checked in either right before the bad update was pushed or right after it was pulled.
    Another facet of AVs is how they work depends on monitoring every part of a computer. This requires specific drivers to integrate into the core OS, which were updated to accompany the definition update. Anything that integrates that closely can cause issues if it isn’t made right.

    Before this incident, Crowdstrike was regarded as the best in its class of EDR software. This isn’t something companies would swap to willy nilly just because they feel like it. The scale of implementing a new security software for all systems in an org is a huge undertaking, one that I’ve been a part of several times. It sucks to not only rip out the old software but also integrate the new software and make sure it doesn’t mess up other parts of the server. Basically companies wouldn’t use CS unless they are too lazy to change away, or they think it’s really that good.
    EDR software plays a huge role in securing a company’s systems. Companies need this tech for security but also because they risk failing critical audits or can’t qualify for cybersecurity insurance. Any similar software could have issues - Cylance, Palo Alto Cortex XDR, Trend Micro are all very strong players in the field too and are just as prone to having issues.
    And it’s not just the EDR software that could cause issues, but lots of other tech. Anything that does regular definition or software updating can’t or shouldn’t be monitored because of the frequency or urgency of each update would be impractical to filter by an enterprise. Firewalls come to mind, but there could be a lot of systems at risk of failing due to a bad update. Of course, it should fall on the enterprise to provide the manpower to do this, but this is highly unlikely when most IT teams are already skeleton crews and subject to heavy budget cuts.

    So with all that, you might ask “how is this mitigated?” It’s a very good question. The most obvious solution “don’t use one software on all systems” is more complicated and expensive than you think. Imagine bug testing your software for two separate web servers - one uses Crowdstrike, Tenable, Apache, Python, and Node.js, and the other uses TrendMicro, Qualys, nginx, PHP, and Rust. The amount of time wasted on replicating behavior would be astronomical, not to mention unlikely to have feature parity. At what point do you define the line of “having redundant tech stacks” to be too burdensome? That’s the risk a lot of companies take on when choosing a vendor.
    On a more relatable scale, imagine you work at a company and desktop email clients are the most important part of your job. One half of the team uses Microsoft Office and the other half uses Mozilla Thunderbird. Neither software has feature parity with the other, and one will naturally be superior over the other. But because the org is afraid of everyone getting locked out of emails, you happen to be using “the bad” software. Not a very good experience for your team, even if it is overall more reliable.

    A better solution is improved BCDR (business continuity disaster recovery) processes, most notably backup and restore testing. For my personal role in this incident, I only have a handful of servers affected by this crisis for which I am very grateful. I was able to recover 6 out of 7 affected servers, but the last is proving to be a little trickier. The best solution would be to restore this server to a former state and continue on, but in my haste to set up the env, I neglected to configure snapshotting and other backup processes. It won’t be the end of the world to recreate this server, but this could be even worse if this server had any critical software on it. I do plan on using this event to review all systems I have a hand in to assess redundancy in each facet - cloud, region, network, instance, and software level.
    Laptops are trickier to fix because of how distributed they are by nature. However, they can still be improved by having regular backups taken of a user’s files and testing that Bitlocker is properly configured and curated.

    All that said, I’m far from an expert on this, just an IT admin trying to do what I can with company resources. Here’s hoping Crowdstrike and other companies greatly improve their QA testing, and IT departments finally get the tooling approved to improve their backup and recovery strategies.

    • sylver_dragon@lemmy.world
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      3 months ago

      Fantastic write up. I’d just add something to this bit:

      Basically companies wouldn’t use CS unless they are too lazy to change away, or they think it’s really that good.

      I work in Cyber Security for a large organization (30,000+ end points). We’re considering moving to CrowdStrike. Even after this cock-up, we’re still considering moving to CS. I’ve had direct experience with several different A/V and EDR products, and every single one of them has had a bad update cause systems to BSOD. The reason this one hit so hard is that CS is one of the major EDR/XDR vendors. But ya, it’s generally considered that good. Maybe some folks will move away after this. And maybe another product is nipping at their heels and will overtake them in the near future. But, for now, it’s not surprising that it was everywhere for this situation to get really FUBAR.

      • sunzu@kbin.run
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        3 months ago

        If people don’t start using alternatives, the Centralization remains as a vulnerability and this will happen again then.

        • Sadbutdru@sopuli.xyz
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          3 months ago

          Perhaps instead of clients using two different security systems, Crowd strike and similar companies could have two or more completely independent teams sending out separate versions of their hourly updates. That way when something like this happens it would likely not bring down all of a client’s systems, and help resilience? It could be made into a requirement for providing security software to critical/strategic industries like healthcare, power transmission/distribution, defense, etc.

    • Marighost@lemm.ee
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      3 months ago

      Great write up, and I’m glad you were able to recover most of your servers after this incident.