#VU64803 Insufficient verification of data authenticity in SYSMAC NJ Series and SYSMAC NX Series - CVE-2022-31206

Vulnerability identifier: #VU64803

Vulnerability risk: Low

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-31206

CWE-ID: CWE-345

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SYSMAC NJ Series
Hardware solutions / Routers & switches, VoIP, GSM, etc
SYSMAC NX Series
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Omron

Description

The vulnerability allows a remote user to compromsie the target system.

The vulnerability exists due to the logic that is downloaded to the PLC is not cryptographically authenticated. A remote administrator can manipulate transmitted object code to the PLC and execute arbitrary machine code on the processor of the PLC's CPU module.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SYSMAC NJ Series: before 1.49

SYSMAC NX Series: before 1.29

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External links
https://ics-cert.us-cert.gov/advisories/icsa-22-179-02

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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