CVE-2023-38744

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.

• omron cj2m-cpu35 firmware (<= 2.18) • omron cj2m-cpu34 firmware (<= 2.18) • omron cj2m-cpu33 firmware (<= 2.18) • omron cj2m-cpu32 firmware (<= 2.18) • omron cj2m-cpu31 firmware (<= 2.18) • omron cj2h-cpu68-eip firmware (<= 3.04) • omron cj2h-cpu67-eip firmware (<= 3.04) • omron cj2h-cpu66-eip firmware (<= 3.04) • omron cj2h-cpu65-eip firmware (<= 3.04) • omron cj2h-cpu64-eip firmware (<= 3.04) • omron cs1w-eip21 firmware (<= 3.04) • omron cj1w-eip21 firmware (<= 3.04)