Insufficient session expiration in FortiOS API

1) Insufficient Session Expiration

EUVDB-ID: #VU78114

Risk: Low

CVSSv4.0: 0.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-28001

CWE-ID: CWE-613 - Insufficient Session Expiration

Exploit availability: No

Description

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to insufficient session expiration issue in FortiOS REST API, which results in a persistent websocket connection after deleting the API admin. A remote attacker can reuse the session of a deleted user and gain unauthorized access to the system.

Successful exploitation of the vulnerability requires knowledge of an API token.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FortiOS: 7.0.0 - 7.2.4

CPE2.3

• cpe:2.3:o:fortinet:fortios:7.0.0:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.0.3:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.0.5:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.0.6:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.0.7:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.0.8:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.0.9:*:*:*:*:*:*:*

External links

https://fortiguard.com/psirt/FG-IR-23-028

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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