CVE-2023-0811

Description

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

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-01 ↗
• https://www.ia.omron.com/product/vulnerability/OMSR-2023-001_en.pdf ↗