CVE-2018-21246 — Improper Authentication in Caddyserver Caddy

CWE-287 — Improper Authentication7 documents6 sources
Severity
9.8CRITICALNVD
EPSS
1.4%
top 19.72%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Github.com Caddyserver CaddyGithub.com Mholt CaddyCaddyserver Caddy
Timeline
PublishedJun 15
Latest updateOct 6

Description

Caddy before 0.10.13 mishandles TLS client authentication, as demonstrated by an authentication bypass caused by the lack of the StrictHostMatching mode.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages3 packages

▶NVDcaddyserver/caddy< 0.10.3

🔴Vulnerability Details

4
GHSA
Caddy vulnerable to Authentication Bypass due to mishandling of TLS client authentication↗2022-10-06
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OSV
Caddy vulnerable to Authentication Bypass due to mishandling of TLS client authentication↗2022-10-06
▶
OSV
Authentication bypass in github.com/mholt/caddy↗2021-04-14
▶
CVEList
CVE-2018-21246: Caddy before 0↗2020-06-15
▶

📋Vendor Advisories

1
Debian
CVE-2018-21246: caddy - Caddy before 0.10.13 mishandles TLS client authentication, as demonstrated by an...↗2018
▶

💬Community

1
Bugzilla
CVE-2018-21246 caddy: Does not have tls StrictHostMatching mode enabled which could result in client auth bypass↗2020-05-05
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CVE-2018-21246 — Improper Authentication | cvebase