critical9.1
CVE-2023-0811
Omron CJ1M unit v4.0 and prior has improper access controls on the memory region where the UM password is stored.
Impact
Omron CJ1M unit v4.0 and prior has improper access controls on the memory region where the UM password is stored. If an adversary issues a PROGRAM AREA WRITE command to a specific memory region, they could overwrite the password. This may lead to disabling UM protections or setting a non-ASCII password (non-keyboard characters) and preventing an engineer from viewing or modifying the user program.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Omron | Sysmac Cj2h-Cpu64 Firmware | All versions |
| Omron | Sysmac Cj2h-Cpu64-Eip Firmware | All versions |
| Omron | Sysmac Cj2h-Cpu65 Firmware | All versions |
| Omron | Sysmac Cj2h-Cpu65-Eip Firmware | All versions |
| Omron | Sysmac Cj2h-Cpu66 Firmware | All versions |
| Omron | Sysmac Cj2h-Cpu66-Eip Firmware | All versions |
| Omron | Sysmac Cj2h-Cpu67 Firmware | All versions |
| Omron | Sysmac Cj2h-Cpu67-Eip Firmware | All versions |
| Omron | Sysmac Cj2h-Cpu68 Firmware | All versions |
| Omron | Sysmac Cj2h-Cpu68-Eip Firmware | All versions |
| Omron | Sysmac Cj2m-Cpu11 Firmware | All versions |
| Omron | Sysmac Cj2m-Cpu12 Firmware | All versions |