SSL Certificate Signed with the Compromised FortiGate Key

medium Nessus Plugin ID 62969

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Synopsis

The SSL certificate for this service was signed by a certificate authority (CA) whose private key has been compromised.

Description

The X.509 certificate of the remote host was signed by a certificate belonging to a Certificate Authority (CA) found in FortiGate devices.
The private key corresponding to the CA has been compromised, meaning that the remote host's X.509 certificate cannot be trusted.

Certificate chains descending from this CA could allow an attacker to perform man-in-the-middle attacks and decode traffic.

Solution

Configure the device to use a device-specific CA certificate.

Plugin Details

Severity: Medium

ID: 62969

File Name: ssl_fortigate.nasl

Version: 1.9

Type: remote

Family: General

Published: 11/19/2012

Updated: 2/11/2022

Configuration: Enable paranoid mode

Risk Information

VPR

Risk Factor: Medium

Score: 4.2

CVSS v2

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 3.9

Vector: AV:A/AC:H/Au:N/C:C/I:P/A:N

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2012-4948

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N

Vulnerability Information

CPE: x-cpe:/h:fortinet:fortigate

Required KB Items: Settings/ParanoidReport, SSL/Supported

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 10/22/2012

Reference Information

CVE: CVE-2012-4948

BID: 56382

CERT: 111708