CVE-2020-12812

Fortinet FortiOS SSL VPN Improper Authentication Vulnerability

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

Yes

*KEV

Decision

*SSVC

Descriptions

An improper authentication vulnerability in SSL VPN in FortiOS 6.4.0, 6.2.0 to 6.2.3, 6.0.9 and below may result in a user being able to log in successfully without being prompted for the second factor of authentication (FortiToken) if they changed the case of their username.

Una vulnerabilidad de autenticación inapropiada en SSL VPN en FortiOS versiones 6.4.0, 6.2.0 a 6.2.3, 6.0.9 y posteriores, puede resultar en que un usuario sea capaz de iniciar sesión con éxito sin que sea requerido el segundo factor de autenticación (FortiToken) si cambiaron el caso de su nombre de usuario

Fortinet FortiOS SSL VPN contains an improper authentication vulnerability that may allow a user to login successfully without being prompted for the second factor of authentication (FortiToken) if they change the case in their username.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-05-12 CVE Reserved
2020-07-24 CVE Published
2021-11-03 Exploited in Wild
2022-05-03 KEV Due Date
2024-02-14 EPSS Updated
2024-08-04 CVE Updated
---------- First Exploit

CWE

CWE-178: Improper Handling of Case Sensitivity
CWE-287: Improper Authentication

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://fortiguard.com/psirt/FG-IR-19-283	2024-02-13

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"				< 6.0.10 Search vendor "Fortinet" for product "Fortios" and version " < 6.0.10"		-		Affected
Fortinet Search vendor "Fortinet"		Fortios Search vendor "Fortinet" for product "Fortios"				>= 6.2.0 < 6.2.4 Search vendor "Fortinet" for product "Fortios" and version " >= 6.2.0 < 6.2.4"		-		Affected
Fortinet Search vendor "Fortinet"		Fortios Search vendor "Fortinet" for product "Fortios"				6.4.0 Search vendor "Fortinet" for product "Fortios" and version "6.4.0"		-		Affected