CVE-2023-0811
high-risk
Published 2023-03-16
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.
Do I need to act?
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0.16% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.1/10
Critical
NETWORK
/ LOW complexity
Affected Products (20)
Sysmac Cj2H-Cpu64 Firmware
Sysmac Cj2H-Cpu64-Eip Firmware
Sysmac Cj2H-Cpu65 Firmware
Sysmac Cj2H-Cpu65-Eip Firmware
Sysmac Cj2H-Cpu66 Firmware
Sysmac Cj2H-Cpu66-Eip Firmware
Sysmac Cj2H-Cpu67 Firmware
Sysmac Cj2H-Cpu67-Eip Firmware
Sysmac Cj2H-Cpu68 Firmware
Sysmac Cj2H-Cpu68-Eip Firmware
Sysmac Cj2M-Cpu11 Firmware
Sysmac Cj2M-Cpu12 Firmware
Sysmac Cj2M-Cpu13 Firmware
Sysmac Cj2M-Cpu14 Firmware
Sysmac Cj2M-Cpu15 Firmware
Sysmac Cj2M-Cpu31 Firmware
Sysmac Cj2M-Cpu32 Firmware
Sysmac Cj2M-Cpu33 Firmware
Sysmac Cj2M-Cpu34 Firmware
Sysmac Cj2M-Cpu35 Firmware
Affected Vendors
References (4)
Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-01
Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-01
64
/ 100
high-risk
Severity
31/34 · Critical
Exploitability
1/34 · Minimal
Exposure
32/34 · Critical