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GoogleOSV:GHSA-GR7W-X2JP-3XGW

HistoryOct 06, 2022 - 10:58 p.m.

Caddy vulnerable to Authentication Bypass due to mishandling of TLS client authentication

2022-10-0622:58:56

Google

osv.dev

caddy

vulnerable

authentication

bypass

tls

client

stricthostmatching

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.003

Percentile

71.0%

JSON

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

References

bugs.gentoo.org/715214

github.com/caddyserver/caddy

github.com/caddyserver/caddy/commit/4d9ee000c8d2cbcdd8284007c1e0f2da7bc3c7c3

github.com/caddyserver/caddy/pull/2099

github.com/caddyserver/caddy/releases/tag/v0.10.13

nvd.nist.gov/vuln/detail/CVE-2018-21246

pkg.go.dev/vuln/GO-2020-0043

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.003

Percentile

71.0%

JSON

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