FortiOS DRBG unsufficient entropy (FG-IR-19-186)

Low Nessus Plugin ID 130209

Synopsis

The remote host is affected by an information disclosure vulnerability.

Description

An Insufficient Entropy in PRNG vulnerability in Fortinet FortiOS 6.2.1 and below for device not enable hardware TRNG token and models not support builtin TRNG seed allows attacker to theoretically recover the long term ECDSA secret in a TLS client with a RSA handshake and mutual ECDSA authentication via the help of flush+reload side channel attacks in FortiGate VM models only.

Solution

Upgrade to Fortinet FortiOS version 6.2.1 or later.

See Also

https://fortiguard.com/psirt/FG-IR-19-186

Plugin Details

Severity: Low

ID: 130209

File Name: fortios_FG-IR-19-186.nasl

Version: 1.4

Type: local

Family: Firewalls

Published: 2019/10/25

Updated: 2019/11/22

Dependencies: 73522

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Low

CVSS Score Source: CVE-2019-15703

CVSS v2.0

Base Score: 2.6

Temporal Score: 1.9

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

Required KB Items: Host/Fortigate/model, Host/Fortigate/version, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 2019/10/18

Vulnerability Publication Date: 2019/10/18

Reference Information

CVE: CVE-2019-15703