Fortinet FortiOS up to 6.4.6 LDAP Server certificate host validation

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Fortinet FortiOS up to 6.4.6. This vulnerability affects unknown code of the component LDAP Server Handler. This manipulation causes certificate host validation. This vulnerability is tracked as CVE-2021-41019. The attack is only possible within the local network. No exploit exists.

Detailsinfo

A vulnerability was found in Fortinet FortiOS up to 6.4.6 (Firewall Software). It has been declared as problematic. Affected by this vulnerability is some unknown processing of the component LDAP Server Handler. The manipulation with an unknown input leads to a certificate host validation vulnerability. The CWE definition for the vulnerability is CWE-297. The product communicates with a host that provides a certificate, but the product does not properly ensure that the certificate is actually associated with that host. As an impact it is known to affect confidentiality.

The weakness was disclosed 11/03/2021 as FG-IR-21-074. It is possible to read the advisory at fortiguard.com. This vulnerability is known as CVE-2021-41019 since 09/13/2021. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 209759 (Fortinet Fortigate Missing certificate CN/SAN validation leads to information disclosure (FG-IR-21-074)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (209759). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.2

VulDB Base Score: 2.6
VulDB Temp Score: 2.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 3.5
CNA Vector (Fortinet, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Certificate host validation
CWE: CWE-297 / CWE-295 / CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 209759
Nessus Name: Fortinet Fortigate Missing certificate CN/SAN validation leads to information disclosure (FG-IR-21-074)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

09/13/2021 🔍
11/03/2021 +51 days 🔍
11/03/2021 +0 days 🔍
05/02/2025 +1276 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: FG-IR-21-074
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-41019 (🔍)
GCVE (CVE): GCVE-0-2021-41019
GCVE (VulDB): GCVE-100-185947

Entryinfo

Created: 11/03/2021 08:22
Updated: 05/02/2025 22:05
Changes: 11/03/2021 08:22 (49), 11/06/2021 14:15 (2), 11/06/2021 14:17 (18), 10/29/2024 15:41 (16), 05/02/2025 22:05 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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