IP address spoofing in FortiOS and FortiProxy SSL-VPN

1) Insufficient verification of data authenticity

EUVDB-ID: #VU89599

Risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-45586

CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity

Exploit availability: No

Description

The vulnerability allows a remote user to perform spoofing attack.

The vulnerability exists due to insufficient verification of data authenticity in the SSL-VPN tunnel mode. A remote authenticated user can send specially crafted packets with a spoofed IP address.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FortiOS: 6.2.0 - 7.4.1

FortiProxy: 2.0.0 - 7.4.1

CPE2.3

• cpe:2.3:o:fortinet:fortios:7.4.1:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.2.7:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.0.12:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.4.15:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:6.2.16:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:7.4.1:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:7.2.7:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:7.0.13:*:*:*:*:*:*:*
• cpe:2.3:h:fortinet:fortiproxy:2.0.14:*:*:*:*:*:*:*

External links

http://fortiguard.com/psirt/FG-IR-23-225

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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