Vulnerabilities > CVE-2019-5591 - Missing Authentication for Critical Function vulnerability in Fortinet Fortios

CVSS 6.5 - MEDIUM

Attack vector

ADJACENT_NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

HIGH

Integrity impact

NONE

Availability impact

NONE

low complexity

fortinet

CWE-306

nessus

NVD

Published: 2020-08-14

Updated: 2024-10-24

Summary

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

Vulnerable Configurations

Part	Description	Count
OS	Fortinet Fortinet Fortios 3.1.0 Fortinet Fortios 3.2.0 Fortinet Fortios 3.3.0 Fortinet Fortios 3.3.3 Fortinet Fortios 3.3.5 Fortinet Fortios 3.3.6 Fortinet Fortios 3.3.7 Fortinet Fortios 3.3.8 Fortinet Fortios 3.3.9 Fortinet Fortios 3.3.10 Fortinet Fortios 3.3.11 Fortinet Fortios 3.3.12 Fortinet Fortios 3.3.13 Fortinet Fortios 3.3.14 Fortinet Fortios 3.4.0 Fortinet Fortios 3.4.1 Fortinet Fortios 3.4.2 Fortinet Fortios 3.4.3 Fortinet Fortios 3.4.4 Fortinet Fortios 3.4.5 Fortinet Fortios 3.5.0 Fortinet Fortios 3.5.1 Fortinet Fortios 3.5.2 Fortinet Fortios 3.5.3 Fortinet Fortios 3.5.4 Fortinet Fortios 3.5.5 Fortinet Fortios 3.5.6 Fortinet Fortios 3.5.7 Fortinet Fortios 3.6.0 Fortinet Fortios 3.6.1 Fortinet Fortios 3.6.2 Fortinet Fortios 3.6.3 Fortinet Fortios 3.6.4 Fortinet Fortios 3.6.5 Fortinet Fortios 3.6.6 Fortinet Fortios 3.7.0 Fortinet Fortios 3.7.1 Fortinet Fortios 3.7.2 Fortinet Fortios 3.7.3 Fortinet Fortios 3.7.4 Fortinet Fortios 3.7.5 Fortinet Fortios 3.7.6 Fortinet Fortios 3.7.7 Fortinet Fortios 3.7.8 Fortinet Fortios 3.7.9 Fortinet Fortios 3.7.10 Fortinet Fortios 4.0.0 Fortinet Fortios 4.0.1 Fortinet Fortios 4.0.2 Fortinet Fortios 4.0.3 Fortinet Fortios 4.0.4 Fortinet Fortios 4.1.0 Fortinet Fortios 4.1.1 Fortinet Fortios 4.1.2 Fortinet Fortios 4.1.3 Fortinet Fortios 4.1.4 Fortinet Fortios 4.1.5 Fortinet Fortios 4.1.6 Fortinet Fortios 4.1.7 Fortinet Fortios 4.1.8 Fortinet Fortios 4.1.9 Fortinet Fortios 4.1.10 Fortinet Fortios 4.1.11 Fortinet Fortios 4.2.0 Fortinet Fortios 4.2.1 Fortinet Fortios 4.2.2 Fortinet Fortios 4.2.3 Fortinet Fortios 4.2.4 Fortinet Fortios 4.2.5 Fortinet Fortios 4.2.6 Fortinet Fortios 4.2.7 Fortinet Fortios 4.2.8 Fortinet Fortios 4.2.9 Fortinet Fortios 4.2.10 Fortinet Fortios 4.2.11 Fortinet Fortios 4.2.12 Fortinet Fortios 4.2.13 Fortinet Fortios 4.2.14 Fortinet Fortios 4.2.15 Fortinet Fortios 4.2.16 Fortinet Fortios 4.3.0 Fortinet Fortios 4.3.1 Fortinet Fortios 4.3.2 Fortinet Fortios 4.3.3 Fortinet Fortios 4.3.4 Fortinet Fortios 4.3.5 Fortinet Fortios 4.3.6 Fortinet Fortios 4.3.7 Fortinet Fortios 4.3.8 Fortinet Fortios 4.3.9 Fortinet Fortios 4.3.10 Fortinet Fortios 4.3.11 Fortinet Fortios 4.3.12 Fortinet Fortios 4.3.13 Fortinet Fortios 4.3.14 Fortinet Fortios 4.3.15 Fortinet Fortios 4.3.16 Fortinet Fortios 4.3.17 Fortinet Fortios 4.3.18 Fortinet Fortios 4.3.19 Fortinet Fortios 5.0 Fortinet Fortios 5.0.0 Fortinet Fortios 5.0.1 Fortinet Fortios 5.0.2 Fortinet Fortios 5.0.3 Fortinet Fortios 5.0.4 Fortinet Fortios 5.0.5 Fortinet Fortios 5.0.6 Fortinet Fortios 5.0.7 Fortinet Fortios 5.0.8 Fortinet Fortios 5.0.9 Fortinet Fortios 5.0.10 Fortinet Fortios 5.0.11 Fortinet Fortios 5.0.12 Fortinet Fortios 5.0.13 Fortinet Fortios 5.0.14 Fortinet Fortios 5.2.0 Fortinet Fortios 5.2.1 Fortinet Fortios 5.2.2 Fortinet Fortios 5.2.3 Fortinet Fortios 5.2.4 Fortinet Fortios 5.2.5 Fortinet Fortios 5.2.6 Fortinet Fortios 5.2.7 Fortinet Fortios 5.2.8 Fortinet Fortios 5.2.9 Fortinet Fortios 5.2.10 Fortinet Fortios 5.2.11 Fortinet Fortios 5.2.12 Fortinet Fortios 5.2.13 Fortinet Fortios 5.2.14 Fortinet Fortios 5.2.15 Fortinet Fortios 5.4 Fortinet Fortios 5.4.0 Fortinet Fortios 5.4.1 Fortinet Fortios 5.4.2 Fortinet Fortios 5.4.3 Fortinet Fortios 5.4.4 Fortinet Fortios 5.4.5 Fortinet Fortios 5.4.6 Fortinet Fortios 5.4.7 Fortinet Fortios 5.4.8 Fortinet Fortios 5.4.9 Fortinet Fortios 5.4.10 Fortinet Fortios 5.4.11 Fortinet Fortios 5.4.12 Fortinet Fortios 5.4.13 Fortinet Fortios 5.6.0 Fortinet Fortios 5.6.1 Fortinet Fortios 5.6.2 Fortinet Fortios 5.6.3 Fortinet Fortios 5.6.4 Fortinet Fortios 5.6.5 Fortinet Fortios 5.6.6 Fortinet Fortios 5.6.7 Fortinet Fortios 5.6.8 Fortinet Fortios 5.6.9 Fortinet Fortios 5.6.10 Fortinet Fortios 5.6.11 Fortinet Fortios 5.6.12 Fortinet Fortios 5.6.13 Fortinet Fortios 5.6.14 Fortinet Fortios 6.0.0 Fortinet Fortios 6.0.1 Fortinet Fortios 6.0.2 Fortinet Fortios 6.0.3 Fortinet Fortios 6.0.4 Fortinet Fortios 6.0.5 Fortinet Fortios 6.0.6 Fortinet Fortios 6.0.7 Fortinet Fortios 6.0.8 Fortinet Fortios 6.0.9 Fortinet Fortios 6.0.10 Fortinet Fortios 6.0.11 Fortinet Fortios 6.0.12 Fortinet Fortios 6.0.13 Fortinet Fortios 6.0.14 Fortinet Fortios 6.0.15 Fortinet Fortios 6.0.16 Fortinet Fortios 6.0.17 Fortinet Fortios 6.2.0	181

Common Weakness Enumeration (CWE)

CWE-306 - Missing Authentication for Critical Function

Common Attack Pattern Enumeration and Classification (CAPEC)

Choosing a Message/Channel Identifier on a Public/Multicast Channel
Attackers aware that more data is being fed into a multicast or public information distribution means can 'select' information bound only for another client, even if the distribution means itself forces users to authenticate in order to connect initially. Doing so allows the attacker to gain access to possibly privileged information, possibly perpetrate other attacks through the distribution means by impersonation. If the channel/message being manipulated is an input rather than output mechanism for the system, (such as a command bus), this style of attack could change its identifier from a less privileged to more so privileged channel or command.
Using Unpublished Web Service APIs
An attacker searches for and invokes Web Services APIs that the target system designers did not intend to be publicly available. If these APIs fail to authenticate requests the attacker may be able to invoke services and/or gain privileges they are not authorized for.
Manipulating Writeable Terminal Devices
This attack exploits terminal devices that allow themselves to be written to by other users. The attacker sends command strings to the target terminal device hoping that the target user will hit enter and thereby execute the malicious command with their privileges. The attacker can send the results (such as copying /etc/passwd) to a known directory and collect once the attack has succeeded.
Cross Site Request Forgery (aka Session Riding)
An attacker crafts malicious web links and distributes them (via web pages, email, etc.), typically in a targeted manner, hoping to induce users to click on the link and execute the malicious action against some third-party application. If successful, the action embedded in the malicious link will be processed and accepted by the targeted application with the users' privilege level. This type of attack leverages the persistence and implicit trust placed in user session cookies by many web applications today. In such an architecture, once the user authenticates to an application and a session cookie is created on the user's system, all following transactions for that session are authenticated using that cookie including potential actions initiated by an attacker and simply "riding" the existing session cookie.

Nessus

NASL family	Firewalls
NASL id	FORTIOS_FG-IR-19-037.NASL
description	The remote host is running a FortiOS version prior to 6.2.1. It is, therefore, affected by an information disclosure vulnerability. An unauthenticated attacker on the same subnet may be able to intercept sensitive information by impersonating the configured LDAP server.
last seen	2020-06-01
modified	2020-06-02
plugin id	127134
published	2019-08-12
reporter	This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof.
source	https://www.tenable.com/plugins/nessus/127134
title	Fortinet FortiGate < 6.2.1 Information Disclosure (FG-IR-19-037)
code	# # (C) Tenable Network Security, Inc. # include("compat.inc"); if (description) { script_id(127134); script_version("1.3"); script_cvs_date("Date: 2019/11/22"); script_cve_id("CVE-2019-5591"); script_name(english:"Fortinet FortiGate < 6.2.1 Information Disclosure (FG-IR-19-037)"); script_summary(english:"Checks the version of FortiOS."); script_set_attribute(attribute:"synopsis", value: "The remote host is affected by an information disclosure vulnerability."); script_set_attribute(attribute:"description", value: "The remote host is running a FortiOS version prior to 6.2.1. It is, therefore, affected by an information disclosure vulnerability. An unauthenticated attacker on the same subnet may be able to intercept sensitive information by impersonating the configured LDAP server."); script_set_attribute(attribute:"see_also", value:"https://fortiguard.com/psirt/FG-IR-19-037"); script_set_attribute(attribute:"solution", value: "Upgrade to Fortinet FortiOS version 6.2.1 or later."); script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:N/C:P/I:N/A:N"); script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C"); script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"); script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C"); script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-5591"); script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available"); script_set_attribute(attribute:"vuln_publication_date", value:"2019/07/26"); script_set_attribute(attribute:"patch_publication_date", value:"2019/07/26"); script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/12"); script_set_attribute(attribute:"potential_vulnerability", value:"true"); script_set_attribute(attribute:"plugin_type", value:"local"); script_set_attribute(attribute:"cpe", value:"cpe:/o:fortinet:fortios"); script_end_attributes(); script_category(ACT_GATHER_INFO); script_family(english:"Firewalls"); script_copyright(english:"This script is Copyright (C) 2019 and is owned by Tenable, Inc. or an Affiliate thereof."); script_dependencies("fortinet_version.nbin"); script_require_keys("Host/Fortigate/model", "Host/Fortigate/version", "Settings/ParanoidReport"); exit(0); } include("audit.inc"); include("vcf.inc"); if (report_paranoia < 2) audit(AUDIT_PARANOID); app_name = "FortiOS"; app_info = vcf::get_app_info(app:app_name, kb_ver:"Host/Fortigate/version"); constraints = [ { "fixed_version" : "6.2.1" } ]; vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_NOTE);

References

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

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

Nessus

Related news

References