CVE Vulnerability

CVE-2018-19148

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.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

Scope

3.7 /10

CVSS v3.0 : LOW

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/mholt/caddy/pull/2015 Issue Tracking Patch
https://github.com/mholt/caddy/issues/2334 Issue Tracking Patch
https://github.com/mholt/caddy/issues/1303 Issue Tracking Patch
https://securitytrails.com/blog/caddy-web-server-ssl-bug Exploit Patch
Configurations

Configuration 1

cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:*
Information

Published : 2018-11-10 07:29

Updated : 2019-01-30 06:09

NVD link : CVE-2018-19148

Mitre link : CVE-2018-19148

Products Affected
No products.
CWE
CWE-200