Vulnerability identifier: #VU71171

Vulnerability risk: High

CVSSv3.1: 9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2023-0052

CWE-ID: CWE-306

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Nova 220 (EYK220F001) DDC with BACnet connection
Hardware solutions / Other hardware appliances
Nova 230 (EYK230F001) DDC with BACnet connection
Hardware solutions / Other hardware appliances
Nova 106 (EYK300F001) BACnet communication card
Hardware solutions / Other hardware appliances
moduNet300 (EY-AM300F001)
Hardware solutions / Other hardware appliances
moduNet300 (EY-AM300F002)
Hardware solutions / Other hardware appliances

Vendor: Fr. Sauter AG

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to missing authentication for critical function within the affected software with BACnetstac version 4.2.1 and prior. A remote attacker can access the system and modify the device configuration, leading to arbitrary commands execution.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Nova 220 (EYK220F001) DDC with BACnet connection: 3.3-006

Nova 230 (EYK230F001) DDC with BACnet connection: 3.3-006

Nova 106 (EYK300F001) BACnet communication card: 3.3-006

moduNet300 (EY-AM300F001): 3.3-006

moduNet300 (EY-AM300F002): 3.3-006

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External links
http://ics-cert.us-cert.gov/advisories/icsa-22-012-05

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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.