#VU60346 Improper access control in SeaConnect 370W - CVE-2021-21964

Vulnerability identifier: #VU60346

Vulnerability risk: High

CVSSv4.0: 6.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2021-21964

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SeaConnect 370W
Hardware solutions / Firmware

Vendor: Sealevel Systems

Description

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the Modbus/SeaMAX Remote Configuration functionality within Modbus Interface. A remote attacker can bypass implemented security restrictions and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SeaConnect 370W: 1.3.34

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External links
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1392

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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.