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Nextcloud zero day security (lemmy.world)

submitted 10 months ago by [email protected] to c/[email protected]

30 comments fedilink hide all child comments

What is everyone doing? SELinux? AppArmor? Something else?

I currently leave my nextcloud exposed to the Internet. It runs in a VM behind an nginx reverse proxy on the VM itself, and then my OPNSense router runs nginx with WAF rules. I enforce 2fa and don't allow sign-ups.

My goal is protecting against ransomware and zerodays (as much as possible). I don't do random clicking on links in emails or anything like that, but I'm not sure how people get hit with ransomware. I keep nextcloud updated (subscribed to RSS update feed) frequently and the VM updates everyday and reboots when necessary. I'm running the latest php-fpm and that just comes from repos so it gets updated too. HTTPS on the lan with certificates maintained by my router, and LE certs for the Internet side.

Beside hiding this thing behind a VPN (which I'm not prepared to do currently), is there anything else I'm overlooking?

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[–] [email protected] 2 points 10 months ago (1 children)

My claim is that Headscale has a lesser likelihood of compromise than Nextcloud, and that the E2EE provides an encrypted channel between nodes without an immediate need for TLS. Of course TLS over E2EE enhances CIA. There's no pushback to defense in depth here. But in the beginning, the E2EE will get them moving in the right direction.

OP began the post by stating that the login page to a complex PHP web application is internet facing (again, yikes). Given the current implementation, I can only assume that OP is not prepared to deploy a CA, and that the path of least resistance -- and bolstered security -- can be via implementation of HS+TS. They get the benefit of E2EE without the added complexity, for which there is plenty, of a CA until if/when they're ready to take the plunge.

If we're going to take this nonsense all or nothing stance, don't forget to mention that they're doing poorly unless they implement EDR, IDS, TOTP MFA on all services, myriad DNS controls, and full disk encryption. Because those components don't add to the attack surface as well, right?

[–] [email protected] 1 points 10 months ago

Totally agree on all points!

My only issue was with the assertion that OP could comfortably do away with the certs/https. They said they were already using certs in the post and I wanted to dispel the idea that they arguably might not need them anymore in favour of just using headscale as though one is a replacement for the other.