Fortinet FortiOS self-signed Fortigate CA certificate config

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in Fortinet FortiOS (Firewall Software) (affected version not known). It has been declared as problematic. Affected by this vulnerability is some unknown functionality of the component self-signed Fortigate CA certificate. The manipulation with an unknown input leads to a config vulnerability. The CWE definition for the vulnerability is CWE-16. As an impact it is known to affect confidentiality. The summary by CVE is:

The default configuration of Fortinet Fortigate UTM appliances uses the same Certification Authority certificate and same private key across different customers installations, which makes it easier for man-in-the-middle attackers to spoof SSL servers by leveraging the presence of the Fortinet_CA_SSLProxy certificate in a list of trusted root certification authorities.

The weakness was presented 11/02/2012 by Bitwiper as not defined posting (Website). It is possible to read the advisory at This vulnerability is known as CVE-2012-4948 since 09/17/2012. The exploitation appears to be difficult. The attack can only be initiated within the local network. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1592.004 according to MITRE ATT&CK.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 62969 (SSL Certificate Signed with the Compromised FortiGate Key), which helps to determine the existence of the flaw in a target environment. It is assigned to the family General.

The best possible mitigation is suggested to be Workaround.

The vulnerability is also documented in the databases at X-Force (79781) and Tenable (62969). Additional details are provided at






CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.3
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍



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

NVD Base Score: 🔍


Class: Config
ATT&CK: T1592.004

Local: No
Remote: Partially

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 62969
Nessus Name: SSL Certificate Signed with the Compromised FortiGate Key
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

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


Recommended: Workaround
Status: 🔍

0-Day Time: 🔍

Workaround: Import new CA Certificate


09/17/2012 🔍
11/02/2012 +46 days 🔍
11/02/2012 +0 days 🔍
11/02/2012 +0 days 🔍
11/05/2012 +3 days 🔍
11/08/2012 +3 days 🔍
11/14/2012 +6 days 🔍
11/19/2012 +5 days 🔍
11/28/2012 +9 days 🔍
04/19/2021 +3064 days 🔍



Researcher: Bitwiper
Status: Not defined

CVE: CVE-2012-4948 (🔍)
X-Force: 79781
Vulnerability Center: 37442 - Fortinet Fortigate UTM Spoofing of SSL Servers due to Same Certificate and Key For Different Clients, Medium
SecurityFocus: 56382 - Fortigate UTM appliances CA SSL Certificate Creation Security Bypass Vulnerability
OSVDB: 87048

scip Labs:
Misc.: 🔍


Created: 11/08/2012 05:46 PM
Updated: 04/19/2021 07:09 AM
Changes: 11/08/2012 05:46 PM (70), 03/07/2018 09:31 AM (2), 04/19/2021 07:09 AM (3)
Complete: 🔍
Committer: olku


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