CVE-2011-4197: Pfsense

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

etc/inc/certs.inc in the PKI implementation in pfSense before 2.0.1 creates each X.509 certificate with a true value for the CA basic constraint, which allows remote attackers to create sub-certificates for arbitrary subjects by leveraging the private key.

Affected products

• Pfsense Pfsense: up to and including 2.0; version 1.0.x only; version 1.2.1 only; version 1.2.2 only; version 1.2.3 only

Published 2012-01-03. Last modified 2026-06-16.