Fortinet FortiOS LDAP information disclosure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Fortinet FortiOS and classified as problematic. The impacted element is an unknown function of the component LDAP Handler. This manipulation causes information disclosure. This vulnerability is registered as CVE-2019-5591. The attack requires access to the local network. Furthermore, an exploit is available.

Detailsinfo

A vulnerability has been found in Fortinet FortiOS (Firewall Software) (the affected version unknown) and classified as problematic. Affected by this vulnerability is an unknown part of the component LDAP Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

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

The weakness was published 08/14/2020 (Website). The advisory is shared at fortiguard.com. This vulnerability is known as CVE-2019-5591 since 01/07/2019. The exploitation appears to be difficult. The attack needs to be done within the local network. The exploitation doesn't need any form of authentication. Technical details are unknown but an exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

It is declared as attacked. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 11/03/2021 with a due date of 05/03/2022:

Apply updates per vendor instructions.

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 EUVD (EUVD-2019-15166). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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Vendor

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License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 3.1
VulDB Temp Score: 3.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Attacked

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/07/2019 🔍
08/14/2020 +585 days 🔍
08/14/2020 +0 days 🔍
07/29/2025 +1810 days 🔍

Sourcesinfo

Vendor: fortinet.com

Advisory: fortiguard.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-5591 (🔍)
GCVE (CVE): GCVE-0-2019-5591
GCVE (VulDB): GCVE-100-159925
EUVD: 🔍
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 08/14/2020 21:39
Updated: 07/29/2025 04:38
Changes: 08/14/2020 21:39 (37), 08/14/2020 21:44 (18), 11/10/2020 00:15 (1), 04/19/2024 16:32 (27), 09/09/2024 22:29 (1), 10/23/2024 17:27 (16), 07/29/2025 04:38 (3)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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