CVE-2011-4197

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-01-03 · updated 2026-06-16
Weakness: CWE-264

Description

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

Netgate pfSense CE: through 2.0; 1.0.x, 1.2.1, 1.2.2, 1.2.3

References

http://archives.neohapsis.com/archives/bugtraq/2011-12/0152.html
http://secunia.com/advisories/46780
http://www.osvdb.org/77982
http://www.securityfocus.com/bid/51169
https://exchange.xforce.ibmcloud.com/vulnerabilities/71969
https://github.com/bsdperimeter/pfsense/commit/1379d66f11aaf72982a70287b83e24efcd18898e
https://github.com/bsdperimeter/pfsense/commit/87b4deb2b2dae9013e6aa0fe490d6a5a04a27894
https://www.trustmatta.com/advisories/MATTA-2011-001.txt
http://archives.neohapsis.com/archives/bugtraq/2011-12/0152.html
http://secunia.com/advisories/46780
http://www.osvdb.org/77982
http://www.securityfocus.com/bid/51169

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