CVE-2018-19148

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Summary

CVECVE-2018-19148
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2018-11-10 19:29:00 UTC
Updated2019-01-30 18:09:00 UTC
DescriptionCaddy 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.

Risk And Classification

Problem Types: CWE-200

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Caddyserver Caddy All All All All

References

ReferenceSourceLinkTags
tls: Restructure and improve certificate management by mholt · Pull Request #2015 · caddyserver/caddy · GitHub MISC github.com Issue Tracking, Patch, Third Party Advisory
Caddy serves wrong SSL cert for site that is not served on HTTPS port · Issue #1303 · mholt/caddy · GitHub MISC github.com Issue Tracking, Patch, Third Party Advisory
Making the Web a Better Place: Fixing Caddy Web Server Hostname Enumeration Vulnerability (CVE-2018-19148) MISC securitytrails.com Exploit, Patch, Third Party Advisory
Problem with the way Caddy serves multiple certificates · Issue #2334 · caddyserver/caddy · GitHub MISC github.com Issue Tracking, Patch, Third Party Advisory
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