Denial of service in FortiAuthenticator, FortiDeceptor and FortiMail



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-29056
CWE-ID CWE-307
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Fortinet FortiMail
Server applications / IDS/IPS systems, Firewalls and proxy servers

FortiDeceptor
Client/Desktop applications / Other client software

FortiAuthenticator
Client/Desktop applications / Other client software

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper Restriction of Excessive Authentication Attempts

EUVDB-ID: #VU74994

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-29056

CWE-ID: CWE-307 - Improper Restriction of Excessive Authentication Attempts

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper restriction of excessive authentication attempts. A remote attacker can send numerous HTTP requests to the login form and partially exhaust CPU and memory resources.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Fortinet FortiMail: 5.4.0 - 6.4.0

FortiDeceptor: 1.0.0 - 3.1.1

FortiAuthenticator: 5.1.0 - 6.4.6

CPE2.3 External links

https://fortiguard.com/psirt/FG-IR-20-078


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

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.

Is there known malware, which exploits this vulnerability?

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



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