Overly permissive cross-domain whitelist in Fortinet FortiADC and FortiDDoS-F

1) Overly permissive cross-domain whitelist

EUVDB-ID: #VU83294

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-25603

CWE-ID: CWE-942 - Overly Permissive Cross-domain Whitelist

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass the CORS protection mechanism.

The vulnerability exists due to incorrect processing of the "Origin" HTTP header that is supplied within HTTP request in the API. A remote attacker can supply arbitrary value via the "Origin" HTTP header, bypass implemented CORS protection mechanism and perform cross-site scripting attacks against the vulnerable application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FortiADC: 7.1.0 - 7.1.1

FortiDDoS-F: 6.3.0 - 6.4.1

CPE2.3

• cpe:2.3:a:fortinet:fortiadc:7.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortiadc:7.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortiddos-f:6.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortiddos-f:6.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortiddos-f:6.3.2:*:*:*:*:*:*:*

External links

https://fortiguard.com/psirt/FG-IR-22-518

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.