Critical severity · published Mar 16, 2023
CVE-2023-0811
Omron CJ1M unit v4.0 and prior has improper access controls on the memory region where the UM password is stored
9.1
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SC
Sysmac Cj2h-cpu64 Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2h-cpu64-eip Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2h-cpu65 Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2h-cpu65-eip Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2h-cpu66 Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2h-cpu66-eip Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2h-cpu67 Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2h-cpu67-eip Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2h-cpu68 Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2h-cpu68-eip Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2m-cpu11 Firmware · Omron
All versions, or not specified · source: NVD
SC
Sysmac Cj2m-cpu12 Firmware · Omron
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-0811
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-0811
Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-23-073-01
Mitigation
https://www.ia.omron.com/product/vulnerability/OMSR-2023-001_en.pdf
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