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Fortinet FortiClient TunnelVision - CVE-2024-3661 (FG-IR-24-170)

low Nessus Plugin ID 200475

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Synopsis

remote Windows host is missing one or more security-related updates.

Description

The version of FortiClient installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-24-170 advisory.

 - DHCP can add routes to a client's routing table via the classless static route option (121). VPN-based security solutions that rely on routes to redirect traffic can be forced to leak traffic over the physical interface. An attacker on the same local network can read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN. (CVE-2024-3661)

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

Solution

Upgrade to FortiClient version 6.4.999999 / 7.0.999999 / 7.2.5 / 7.4.1 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-24-170

https://www.leviathansecurity.com/blog/tunnelvision

Plugin Details

Severity: Low

ID: 200475

File Name: forticlient_FG-IR-24-170.nasl

Version: 1.4

Type: local

Agent: windows

Family: Windows

Published: 6/13/2024

Updated: 10/29/2024

Configuration: Enable paranoid mode

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

CVSS v2

Risk Factor: High

Base Score: 7.3

Temporal Score: 5.7

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

CVSS Score Source: CVE-2024-3661

CVSS v3

Risk Factor: High

Base Score: 7.6

Temporal Score: 6.8

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

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

CVSS v4

Risk Factor: Low

Base Score: 2.1

Threat Score: 1.2

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/a:fortinet:forticlient

Required KB Items: installed_sw/FortiClient, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/11/2024

Vulnerability Publication Date: 5/6/2024

Reference Information

CVE: CVE-2024-3661