Man-in-the-Middle (MitM) attack in FortiOS and FortiProxy

1) Man-in-the-Middle (MitM) attack

EUVDB-ID: #VU111045

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-50568

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

The vulnerability exists due to channel accessible by non-endpoint ('man-in-the-middle') in security fabric daemon. An unauthenticated attacker with the knowledge of device specific data can spoof the identity of a downstream device of the security fabric via crafted TCP requests.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FortiOS: 6.4.2 - 7.4.3

FortiProxy: 7.0.0 - 7.4.3

CPE2.3

• cpe:2.3:o:fortinet:fortios:6.4.2:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.4.3:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.4.5:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.4.6:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.4.7:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.4.8:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.4.9:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.4.10:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.4.11:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:7.0.0:*:*:*:*:*:*:*

External links

https://www.fortiguard.com/psirt/FG-IR-24-058

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.