Vulnerability identifier: #VU47004

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-12818

CWE-ID: CWE-778

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiOS
Operating systems & Components / Operating system

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to software may not log traffic from an unauthenticated attacker to Fortinet owned IP addresses. A remote attacker can abuse such behavior to stay unnoticed while performing malicious actions.

Mitigation

Upgrade to 6.4.1 or above, and add dynamic firewall address "FCTEMS_ALL_FORTICLOUD_SERVERS" which includes all FortiGuard servers in the policy to log the traffic for Fortinet IP addresses.

Vulnerable software versions

FortiOS: 6.4.0, 6.2.0 - 6.2.4

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External links
http://fortiguard.com/psirt/FG-IR-20-033

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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.