CVE-2019-5591 : A Default Configuration vulnerability in FortiOS may allow an unauthenticated attacker on the same subnet to intercept s

A Default Configuration vulnerability in FortiOS may allow an unauthenticated attacker on the same subnet to intercept sensitive information by impersonating the LDAP server.

Published 2020-08-14 16:15:16

Updated 2021-07-21 11:39:24

Source Fortinet, Inc.

View at NVD, CVE.org

Products affected by CVE-2019-5591

Fortinet » Fortios
Versions up to, including, (<=) 6.2.0
cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
Matching versions

CVE-2019-5591 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:

Fortinet FortiOS Default Configuration Vulnerability

CISA required action:

Apply updates per vendor instructions.

CISA description:

Fortinet FortiOS contains a default configuration vulnerability that may allow an unauthenticated attacker on the same subnet to intercept sensitive information by impersonating the Lightweight Directory Access Protocol (LDAP) server.

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2019-5591

Added on 2021-11-03 Action due date 2022-05-03

Exploit prediction scoring system (EPSS) score for CVE-2019-5591

EPSS FAQ

0.23%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 61 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-5591

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
3.3	LOW	AV:A/AC:L/Au:N/C:P/I:N/A:N	6.5	2.9	NIST
Access Vector: Adjacent Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
6.5	MEDIUM	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	2.8	3.6	NIST
Attack Vector: Adjacent Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2019-5591

CWE-306 Missing Authentication for Critical Function

The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-5591

https://www.fortiguard.com/psirt/FG-IR-19-037

FortiGate default configuration does not verify the LDAP server identity. | FortiGuard
Vendor Advisory