I generated 16 character (upper/lower) subdomain and set up a virtual host for it in Apache, and within an hour was seeing vulnerability scans.

How are folks digging this up? What’s the strategy to avoid this?

I am serving it all with a single wildcard SSL cert, if that’s relevant.

Thanks

Edit:

  • I am using a single wildcard cert, with no subdomains attached/embedded/however those work
  • I don’t have any subdomains registered with DNS.
  • I attempted dig axfr example.com @ns1.example.com returned zone transfer DENIED

Edit 2: I’m left wondering, is there an apache endpoint that returns all configured virtual hosts?

Edit 3: I’m going to go through this hardening guide and try against with a new random subdomain https://www.tecmint.com/apache-security-tips/

  • foggy@lemmy.worldEnglish
    7·
    6 hours ago

    https://crt.sh/

    When a CA issues an SSL/TLS certificate, they’re required to submit it to public CT logs (append-only, cryptographically verifiable ledgers). This was designed to detect misissued or malicious certificates.

    Red and Blue team alike use this resource (crt.sh) to enumerate subdomains.