CVE-2019-15703

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An Insufficient Entropy in PRNG vulnerability in Fortinet FortiOS 6.2.1, 6.2.0, 6.0.8 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.

Una Entropía Insuficiente en la vulnerabilidad del PRNG en Fortinet FortiOS versión 6.2.1, 6.2.0, 6.0.8 y posteriores, para dispositivos que no habilitan token TRNG de hardware y modelos que no admiten un seed TRNG incorporado permite al atacante recuperar teóricamente el secreto ECDSA a largo plazo en un cliente TLS con un protocolo de enlace RSA y autenticación mutua ECDSA mediante la ayuda de los ataques de canal lateral flush+reload solo en los modelos FortiGate VM.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-08-27 CVE Reserved
2019-10-24 CVE Published
2023-03-07 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-331: Insufficient Entropy

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://fortiguard.com/psirt/FG-IR-19-186	2022-03-31

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Fortinet Search vendor "Fortinet"		Fortios Search vendor "Fortinet" for product "Fortios"				<= 5.6.9 Search vendor "Fortinet" for product "Fortios" and version " <= 5.6.9"		-		Affected
Fortinet Search vendor "Fortinet"		Fortios Search vendor "Fortinet" for product "Fortios"				>= 6.0.0 < 6.0.9 Search vendor "Fortinet" for product "Fortios" and version " >= 6.0.0 < 6.0.9"		-		Affected
Fortinet Search vendor "Fortinet"		Fortios Search vendor "Fortinet" for product "Fortios"				>= 6.2.0 < 6.2.3 Search vendor "Fortinet" for product "Fortios" and version " >= 6.2.0 < 6.2.3"		-		Affected