NVD

CVE-2023-38744 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

Description

Denial-of-service (DoS) vulnerability due to improper validation of specified type of input issue exists in the built-in EtherNet/IP port of the CJ Series CJ2 CPU unit and the communication function of the CS/CJ Series EtherNet/IP unit. If an affected product receives a packet which is specially crafted by a remote unauthenticated attacker, the unit of the affected product may fall into a denial-of-service (DoS) condition. Affected products/versions are as follows: CJ2M CPU Unit CJ2M-CPU3[] Unit version of the built-in EtherNet/IP section Ver. 2.18 and earlier, CJ2H CPU Unit CJ2H-CPU6[]-EIP Unit version of the built-in EtherNet/IP section Ver. 3.04 and earlier, CS/CJ Series EtherNet/IP Unit CS1W-EIP21 V3.04 and earlier, and CS/CJ Series EtherNet/IP Unit CJ1W-EIP21 V3.04 and earlier.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 7.5 HIGH

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: N/A

NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://jvn.jp/en/vu/JVNVU92193064/	CVE, JPCERT/CC	Third Party Advisory
https://www.ia.omron.com/product/vulnerability/OMSR-2023-006_en.pdf	CVE, JPCERT/CC	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-Other	Other	NIST
CWE-1284	Improper Validation of Specified Quantity in Input	CISA-ADP

Known Affected Software Configurations Switch to CPE 2.2

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Change History

6 change records found show changes

CVE Modified by CISA-ADP 6/17/2026 2:11:05 AM

Action

Type

Old Value

New Value

Added

Affected

[{"vendor":"omron","product":"cj2m_cpu_unit","defaultStatus":"unknown","cpes":["cpe:2.3:h:omron:cj2m_cpu_unit:*:*:*:*:*:*:*:*"],"versions":[{"version":"0","lessThan":"2.18","versionType":"custom","status":"affected"}]},{"vendor":"omron","product":"cj2h_cpu_unit","defaultStatus":"unknown","cpes":["cpe:2.3:h:omron:cj2h_cpu_unit:*:*:*:*:*:*:*:*"],"versions":[{"version":"0","lessThan":"3.04","versionType":"custom","status":"affected"}]},{"vendor":"omron","product":"cs_cj_series_ethernet_ip_unit","defaultStatus":"unknown","cpes":["cpe:2.3:h:omron:cs_cj_series_ethernet_ip_unit:*:*:*:*:*:*:*:*"],"versions":[{"version":"0","lessThan":"CS1W-EIP21 V3.04","versionType":"custom","status":"affected"},{"version":"0","lessThan":"CJ1W-EIP21 V3.04","versionType":"custom","status":"affected"}]}]

Added

SSVC

{"timestamp":"2024-10-17T15:04:47.223773Z","id":"CVE-2023-38744","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

Initial Analysis by NIST 8/11/2023 5:01:37 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added	CWE		NIST NVD-CWE-Other
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj1w-eip21_firmware::::::::* versions up to (including) 3.04 OR cpe:2.3:h:omron:cj1w-eip21:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj2h-cpu64-eip_firmware::::::::* versions up to (including) 3.04 OR cpe:2.3:h:omron:cj2h-cpu64-eip:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj2h-cpu65-eip_firmware::::::::* versions up to (including) 3.04 OR cpe:2.3:h:omron:cj2h-cpu65-eip:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj2h-cpu66-eip_firmware::::::::* versions up to (including) 3.04 OR cpe:2.3:h:omron:cj2h-cpu66-eip:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj2h-cpu67-eip_firmware::::::::* versions up to (including) 3.04 OR cpe:2.3:h:omron:cj2h-cpu67-eip:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj2h-cpu68-eip_firmware::::::::* versions up to (including) 3.04 OR cpe:2.3:h:omron:cj2h-cpu68-eip:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj2m-cpu31_firmware::::::::* versions up to (including) 2.18 OR cpe:2.3:h:omron:cj2m-cpu31:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj2m-cpu32_firmware::::::::* versions up to (including) 2.18 OR cpe:2.3:h:omron:cj2m-cpu32:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj2m-cpu33_firmware::::::::* versions up to (including) 2.18 OR cpe:2.3:h:omron:cj2m-cpu33:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj2m-cpu34_firmware::::::::* versions up to (including) 2.18 OR cpe:2.3:h:omron:cj2m-cpu34:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cj2m-cpu35_firmware::::::::* versions up to (including) 2.18 OR cpe:2.3:h:omron:cj2m-cpu35:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:omron:cs1w-eip21_firmware::::::::* versions up to (including) 3.04 OR cpe:2.3:h:omron:cs1w-eip21:-:::::::*
Changed	Reference Type	https://jvn.jp/en/vu/JVNVU92193064/ No Types Assigned	https://jvn.jp/en/vu/JVNVU92193064/ Third Party Advisory
Changed	Reference Type	https://www.ia.omron.com/product/vulnerability/OMSR-2023-006_en.pdf No Types Assigned	https://www.ia.omron.com/product/vulnerability/OMSR-2023-006_en.pdf Vendor Advisory

Quick Info

CVE Dictionary Entry:
CVE-2023-38744
NVD Published Date:
08/03/2023
NVD Last Modified:
06/17/2026
Source:
JPCERT/CC

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2023-38744 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CISA-ADP 6/17/2026 2:11:05 AM

CVE Modified by JPCERT/CC 6/17/2026 2:11:05 AM

CVE Modified by CVE 11/21/2024 3:14:09 AM

CVE Modified by CISA-ADP 10/17/2024 12:35:07 PM

CVE Modified by JPCERT/CC 5/14/2024 9:22:19 AM

Initial Analysis by NIST 8/11/2023 5:01:37 PM

Quick Info