#VU55554 Resource exhaustion in FortiAuthenticator - CVE-2021-22124

Vulnerability identifier: #VU55554

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-22124

CWE-ID: N/A

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FortiAuthenticator
Client/Desktop applications / Other client software

Vendor: Fortinet, Inc

Description

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

The vulnerability exists due to application does not properly control consumption of internal resources in login modules. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiAuthenticator: 4.3.0 - 6.0.5

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External links
https://www.fortiguard.com/psirt/FG-IR-20-170

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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.