Detections
Analytics

Fortinet Fortigate Information disclosure in web proxy error pages (FG-IR-21-231)

medium Nessus Plugin ID 209714

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Synopsis

Fortinet Firewall is missing one or more security-related updates.

Description

The version of Fortigate installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-21-231 advisory.

 - A server-generated error message containing sensitive information in Fortinet FortiOS 7.0.0 through 7.0.3, 6.4.0 through 6.4.8, 6.2.x, 6.0.x and FortiProxy 7.0.0 through 7.0.1, 2.0.x allows malicious webservers to retrieve a web proxy's client username and IP via same origin HTTP requests triggering proxy-generated HTTP status codes pages. (CVE-2021-43206)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

For 6.0.x, see vendor advisory. For 6.2.x, upgrade to Fortigate version 6.2.11 or later. For 6.4.x, upgrade to Fortigate version 6.4.10 or later. For 7.0.x, upgrade to Fortigate version 7.0.4 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-21-231

Plugin Details

Severity: Medium

ID: 209714

File Name: fortigate_FG-IR-21-231.nasl

Version: 1.3

Type: local

Family: Firewalls

Published: 10/26/2024

Updated: 2/14/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.4

CVSS v2

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.2

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2021-43206

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

Required KB Items: Host/Fortigate/model, Host/Fortigate/version

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 5/3/2022

Reference Information

CVE: CVE-2021-43206

IAVA: 2022-A-0221-S