Vulnerability · Published Aug 3, 2023 · Assigned by jpcert
CVE-2023-38744
High 7.5
In plain English
A high-severity security flaw in CJ2H CPU Unit from OMRON Corporation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OMRON Corporation | CJ2M CPU Unit | CJ2M-CPU3[] Unit version of the built-in EtherNet/IP section Ver. 2.18 and earlier |
| OMRON Corporation | CJ2H CPU Unit | CJ2H-CPU6[]-EIP Unit version of the built-in EtherNet/IP section Ver. 3.04 and earlier |
| OMRON Corporation | CS/CJ Series EtherNet/IP Unit | CS1W-EIP21 V3.04 and earlier |
| OMRON Corporation | CS/CJ Series EtherNet/IP Unit | CJ1W-EIP21 V3.04 and earlier |
Weakness: CWE-1284