CVE-2023-38744

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.24%
Vendor Advisory omron.com
Affected: OMRON Corporation CJ2M CPU Unit
Affected: OMRON Corporation CJ2H CPU Unit
Affected: OMRON Corporation CS/CJ Series EtherNet/IP Unit
Affected: OMRON Corporation CS/CJ Series EtherNet/IP Unit
Published at:
Updated at:

References

Link Tags
https://www.ia.omron.com/product/vulnerability/OMSR-2023-006_en.pdf vendor advisory
https://jvn.jp/en/vu/JVNVU92193064/ third party advisory

Frequently Asked Questions

What is the severity of CVE-2023-38744?
CVE-2023-38744 has been scored as a high severity vulnerability.
How to fix CVE-2023-38744?
To fix CVE-2023-38744, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-38744 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-38744 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-38744?
CVE-2023-38744 affects OMRON Corporation CJ2M CPU Unit, OMRON Corporation CJ2H CPU Unit, OMRON Corporation CS/CJ Series EtherNet/IP Unit, OMRON Corporation CS/CJ Series EtherNet/IP Unit.
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