CVE-2018-9127 Information

Description

Botan 2.2.0 - 2.4.0 (fixed in 2.5.0) improperly handled wildcard certificates and could accept certain certificates as valid for hostnames when under RFC 6125 rules they should not match. This only affects certificates issued to the same domain as the host so to impersonate a host one must already have a wildcard certificate matching other hosts in the same domain. For example b*.example.com would match some hostnames that do not begin with a ‘b’ character.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://botan.randombit.net/security.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8