#VU74856 Improper Restriction of Excessive Authentication Attempts in FortiOS and FortiProxy - CVE-2022-43947

Vulnerability identifier: #VU74856

Vulnerability risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-43947

CWE-ID: CWE-307

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
FortiOS
Operating systems & Components / Operating system
FortiProxy
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote attacker to perform a brute-force attack.

The vulnerability exist due to improper restriction of excessive authentication attempts in administrative interface. A remote attacker with access to the administrative interface can perform a brute-force attack and gain unauthorized access to the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiOS: 6.2.0 - 6.2.13, 6.4.0 - 6.4.12, 7.0.0 - 7.0.10, 7.2.0 - 7.2.3

FortiProxy: 1.0.0 - 1.0.7, 1.1.0 - 1.1.6, 1.2.0 - 1.2.13, 2.0.0 - 2.0.12, 7.0.0 - 7.0.7, 7.2.0 - 7.2.1

---

External links
https://fortiguard.fortinet.com/psirt/FG-IR-22-444

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

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