Vulnerability identifier: #VU60932

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-36166

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Fortinet FortiMail
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to a logic error. A remote attacker can guess administrator's authentication token by observing certain system properties. bypass authentication and gain full access to the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Fortinet FortiMail: 6.0.0 - 6.4.5

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External links
http://fortiguard.com/psirt/FG-IR-21-028

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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.