CVE-2018-9127
9.8
CRITICAL
CVSS 3.1
EPSS 0.18%
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.
How to fix CVE-2018-9127
To remediate CVE-2018-9127, upgrade the affected package to a fixed version below.
- —upgrade to 2.5.0-r0 or later
- —upgrade to 2.4.0-5 or later
Is CVE-2018-9127 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.5.0-r0
- from 0, < 2.4.0-5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |