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For users with public facing services: How does the current explosion of AI-discovered vulnerabilities affect your threat model and willingness to be public facing? (lemmy.ml)

submitted 1 week ago by Ferrous@lemmy.ml to c/selfhosted@lemmy.world

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PHP, TLS, etc.. We appear to be facing a tsunami of vulnerabilities being discovered in record time. Further, the window to act on these vulnerabilities has basically closed to zero; hackers' tools now automatically fold the very latest vulnerabilities into their botnets within minutes/hours of discovery. I have always been extremely reluctant to expose any of my services - even with the latest and greatest security tools. My choice to stay totally within the confines of tailscale seems vindicated given this week's news. How are you all taking this?

https://pwn.watch/

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[–] tigerhawkvok@startrek.website 10 points 1 week ago (10 children)

I still do, but I don't host anything on 80 or 443. I use a random large port number, and I've seen zero illegitimate requests in 20 months.

IF there's an active exploit AND it affects a container AND you have a container escape route AND you pick my domain you'd need to statistically try thousands of times to even hit the single open NAT port.

[–] lemmyvore@feddit.nl 13 points 1 week ago (3 children)

I also practice domain/IP obfuscation in addition to high port:

TLS certs are wildcard certs, so bots can't get my subdomains from transparency logs.
My DDNS IP is on a subdomain (random string) not on the base domain.
My public services are also on random subdomains, CNAME'd individually to the IP subdomain.
There is no wildcard CNAME that the bots can query to get the IP.

This eliminates scanning almost completely. They can't find an IP to go with my base domain, first of all. And even if a bot is scanning the IPv4 address space and all the ports and it finds the reverse proxy it can't get past it without knowing a FQDN. I still get the occasional hit from such bots but it's very rare.

Also, all my public services are secured with mTLS (preferably) or at the very least a long key in a custom HTTP header (both enforced at the proxy).

[–] qgadrian@lemmy.world 4 points 1 week ago

Thank you for sharing this, vey insightful

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