Privilege escalation in FortiWeb CLI

1) Stack-based buffer overflow

EUVDB-ID: #VU84876

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-25602

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in CLI. A local user can trigger a stack-based buffer overflow and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Fortinet FortiWeb: 5.6.0 - 6.4.3

CPE2.3

• cpe:2.3:a:fortinet:fortinet_fortiweb:6.4.3:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:6.3.17:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:6.2.6:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:5.7.3:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:5.8.7:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:6.0.7:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:6.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:5.9.1:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortinet_fortiweb:5.6.2:*:*:*:*:*:*:*

External links

http://www.fortiguard.com/psirt/FG-IR-21-234

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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