Information Exposure Affecting github.com/caddyserver/caddy/v2/caddytls package, versions *
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Test your applications- Snyk ID SNYK-GOLANG-GITHUBCOMCADDYSERVERCADDYV2CADDYTLS-6673860
- published 25 Apr 2024
- disclosed 14 May 2022
- credit Max Lielje, Deleted user
Introduced: 14 May 2022
CVE-2018-19148 Open this link in a new tabHow to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Information Exposure due to the server's handling of invalid requests. Specifically when it cannot match a Host header with a vhost in its configuration, it serves the X.509 certificate for a randomly selected vhost. Repeated requests with a nonexistent hostname in the Host header allow for the full enumeration of all certificates on the server, thereby enabling an attacker to easily and accurately discover the existence of and relationships among hostnames that were not intended to be public.