Vulnerability identifier: #VU8977

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-14182

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiOS
Operating systems & Components / Operating system

Vendor: Fortinet, Inc

Description
The vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.

The weakness exists in the web user interface of Fortinet FortiOS due to improper processing of user-supplied input. A remote attacker can pass a specially crafted payload to the 'params' parameter of the JSON web API (URLs with /json) and cause the web interface to become temporarily unavailable.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Update to version 5.4.6 or later.

Vulnerable software versions

FortiOS: 5.4.0 - 5.4.5

---

External links
http://fortiguard.com/psirt/FG-IR-17-206

---

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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