pfSense 1.0.x/1.2.1/1.2.2/1.2.3/2.0 Certificates access control

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability has been found in pfSense 1.0.x/1.2.1/1.2.2/1.2.3/2.0 (Firewall Software) and classified as critical. This vulnerability affects an unknown functionality of the component Certificates. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

etc/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.

The weakness was disclosed 01/03/2012 by Florent Daigniere with Matta Consulting (Website). The advisory is shared for download at This vulnerability was named CVE-2011-4197 since 10/26/2011. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 1.2.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (71969). The entry 59873 is pretty similar.






CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: pfSense 1.2.2


10/26/2011 🔍
12/22/2011 +57 days 🔍
12/22/2011 +0 days 🔍
01/03/2012 +12 days 🔍
01/03/2012 +0 days 🔍
03/23/2015 +1175 days 🔍
11/28/2021 +2442 days 🔍


Advisory: 1379d66f11aaf72982a70287b83e24efcd18898e
Researcher: Florent Daigniere
Organization: Matta Consulting
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-4197 (🔍)
X-Force: 71969
SecurityFocus: 51169 - pfSense Cross Site Scripting and Security Bypass Vulnerabilities
Secunia: 46780 - pfSense Security Issue and Multiple Vulnerabilities, Less Critical
OSVDB: 77982

See also: 🔍


Created: 03/23/2015 04:50 PM
Updated: 11/28/2021 04:24 PM
Changes: 03/23/2015 04:50 PM (57), 02/13/2019 10:54 AM (5), 11/28/2021 04:24 PM (4)
Complete: 🔍


No comments yet. Languages: en.

Please log in to comment.

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!