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

1) Overly permissive cross-domain whitelist

EUVDB-ID: #VU83294

Risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

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

External links

http://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.