CVE-2018-19148

N/A
Published: November 10, 2018 at 07:00 PM UTC
Updated: June 17, 2026 at 01:48 AM UTC
1 product affected across 1 vendorCaddy

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Severity
N/A
Exploit prediction
EPSS 0.9%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 0.11.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

x_refsource_MISCIssue TrackingPatchThird Party Advisory
https://github.com/mholt/caddy/issues/1303
x_refsource_MISCIssue TrackingPatchThird Party Advisory
https://github.com/mholt/caddy/issues/2334
x_refsource_MISCIssue TrackingPatchThird Party Advisory
https://github.com/mholt/caddy/pull/2015

CVSS

Confidentiality
PARTIAL
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-200

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