x/vulndb: potential Go vuln in github.com/mholt/caddy: CVE-2018-19148

[tatianab]

CVE-2018-19148 references github.com/mholt/caddy, which may be a Go module.

Description:
Caddy through 0.11.0 sends incorrect certificates for certain invalid requests, making it easier for attackers to enumerate hostnames. Specifically, when unable to match a Host header with a vhost in its configuration, it serves the X.509 certificate for a randomly selected vhost in its configuration. Repeated requests (with a nonexistent hostname in the Host header) permit full enumeration of all certificates on the server. This generally permits an attacker to easily and accurately discover the existence of and relationships among hostnames that weren't meant to be public, though this information could likely have been discovered via other methods with additional effort.

References:

• NIST: https://nvd.nist.gov/vuln/detail/CVE-2018-19148
• fix: tls: Restructure and improve certificate management caddyserver/caddy#2015
• report: Caddy serves wrong SSL cert for site that is not served on HTTPS port caddyserver/caddy#1303
• report: Problem with the way Caddy serves multiple certificates caddyserver/caddy#2334
• Imported by: https://pkg.go.dev/github.com/mholt/caddy?tab=importedby

Cross references:

• Module github.com/mholt/caddy appears in issue dummy issue #43

See doc/triage.md for instructions on how to triage this report.

modules:
    - module: github.com/mholt/caddy
      vulnerable_at: 1.0.5
      packages:
        - package: n/a
cves:
    - CVE-2018-19148
references:
    - fix: https://github.com/mholt/caddy/pull/2015
    - report: https://github.com/mholt/caddy/issues/1303
    - report: https://github.com/mholt/caddy/issues/2334

[gopherbot]

Change https://go.dev/cl/540721 mentions this issue: data/excluded: batch add 135 excluded reports