CVEvulnerability

CVE-2018-19148

3.7 LOW Published 2018-11-10 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-11-10
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
3.7 LOW — CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:N/AC:M/Au:N/C:P/I:N/A:N
Weaknesses
CWE-200

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.

Affected configurations

• caddyserver caddy (<= 0.11.0)

Related

Weakness · CWE (1)

  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness

References