CVE-2022-31207
criticalpriority · track · 39OT risk · elevatedEPSS 0.010 · 63 %ileEURUUSEPSS · scored 2026-10-27
The Omron SYSMAC Cx product family PLCs (CS series, CJ series, and CP series) through 2022-05-18 lack cryptographic authentication. They utilize the Omron FINS (9600/TCP) protocol for engineering purposes, including downloading projects and control logic to the PLC. This protocol has authentication flaws as reported in FSCT-2022-0057. Control logic is downloaded to PLC volatile memory using the FINS Program Area Read and Program Area Write commands or to non-volatile memory using other commands from where it can be loaded into volatile memory for execution. The logic that is loaded into and executed from the user program area exists in compiled object code form. Upon execution, these object codes are first passed to a dedicated ASIC that determines whether the object code is to be executed by the ASIC or the microprocessor. In the former case, the object code is interpreted by the ASIC whereas in the latter case the object code is passed to the microprocessor for object code interpretation by a ROM interpreter. In the abnormal case where the object code cannot be handled by either, an abnormal condition is triggered and the PLC is halted. The logic that is downloaded to the PLC does not seem to be cryptographically authenticated, thus allowing an attacker to manipulate transmitted object code to the PLC and either execute arbitrary object code commands on the ASIC or on the microprocessor interpreter.
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
No vendor fix yet; a mitigation is available.
- MitigationCP1W-CIF41cisa_csaf_ot
For CVE-2022-31207: Omron recommends users of SYSMAC CS/CJ/CP Series to use the PLC protection password and enable protection against unauthorized write access to address. Also, there are hardware DIP switches on the PLC which can prevent unauthorized PLC program changes regardless of password.
- MitigationSYSMAC CJ2Hcisa_csaf_ot
For CVE-2022-31207: Omron recommends users of SYSMAC CS/CJ/CP Series to use the PLC protection password and enable protection against unauthorized write access to address. Also, there are hardware DIP switches on the PLC which can prevent unauthorized PLC program changes regardless of password.
- MitigationSYSMAC CJ2Mcisa_csaf_ot
For CVE-2022-31207: Omron recommends users of SYSMAC CS/CJ/CP Series to use the PLC protection password and enable protection against unauthorized write access to address. Also, there are hardware DIP switches on the PLC which can prevent unauthorized PLC program changes regardless of password.
- MitigationSYSMAC CP1E/CP1Hcisa_csaf_ot
For CVE-2022-31207: Omron recommends users of SYSMAC CS/CJ/CP Series to use the PLC protection password and enable protection against unauthorized write access to address. Also, there are hardware DIP switches on the PLC which can prevent unauthorized PLC program changes regardless of password.
- MitigationSYSMAC CP1Lcisa_csaf_ot
For CVE-2022-31207: Omron recommends users of SYSMAC CS/CJ/CP Series to use the PLC protection password and enable protection against unauthorized write access to address. Also, there are hardware DIP switches on the PLC which can prevent unauthorized PLC program changes regardless of password.
- MitigationSYSMAC CS1H/CJ1Gcisa_csaf_ot
For CVE-2022-31207: Omron recommends users of SYSMAC CS/CJ/CP Series to use the PLC protection password and enable protection against unauthorized write access to address. Also, there are hardware DIP switches on the PLC which can prevent unauthorized PLC program changes regardless of password.
- MitigationSYSMAC CX-Programmercisa_csaf_ot
For CVE-2022-31207: Omron recommends users of SYSMAC CS/CJ/CP Series to use the PLC protection password and enable protection against unauthorized write access to address. Also, there are hardware DIP switches on the PLC which can prevent unauthorized PLC program changes regardless of password.
- MitigationSYSMAC NJ/NX Seriescisa_csaf_ot
For CVE-2022-31207: Omron recommends users of SYSMAC CS/CJ/CP Series to use the PLC protection password and enable protection against unauthorized write access to address. Also, there are hardware DIP switches on the PLC which can prevent unauthorized PLC program changes regardless of password.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–critical · 5.9–9.8
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (25)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- ICSA-22-179-02Omron SYSMAC CS/CJ/CP Series and NJ/NX Series2022-06-28icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could cause a denial-of-service condition and allow remote code execution.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://cxsecurity.com/cveshow/CVE-2022-31207/cnnvd
- https://us-cert.cisa.gov/ics/advisories/icsa-22-179-02cnnvd
- https://www.auscert.org.au/bulletins/ESB-2022.3140cnnvd
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-179-02cnnvd
- https://www.cybersecurity-help.cz/vdb/SB2022062924cnnvd
- https://www.forescout.com/blog/cnnvd
- https://www.cisa.gov/uscert/ics/advisories/icsa-22-179-02enisa_euvd
- https://www.forescout.com/blog/enisa_euvd
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