#VU61904 Use of a broken or risky cryptographic algorithm in FortiWAN - CVE-2021-32593

Vulnerability identifier: #VU61904

Vulnerability risk: Low

CVSSv4.0: 0.6 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-32593

CWE-ID: CWE-327

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
FortiWAN
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Fortinet, Inc

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to usage of a risky cryptographic algorithm in the Dynamic Tunnel Protocol of FortiWAN. A remote attacker can perform MitM attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiWAN: 4.5.0 - 4.5.8

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External links
https://fortiguard.fortinet.com/psirt/FG-IR-21-070

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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