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.
Published 2023-03-16 18:15:11
Updated 2023-03-28 16:28:08
Source ICS-CERT
View at NVD,   CVE.org
Vulnerability category: BypassGain privilege

Exploit prediction scoring system (EPSS) score for CVE-2023-0811

0.08%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 32 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-0811

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
9.1
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
3.9
5.2
ICS-CERT
9.1
CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
3.9
5.2
NIST

CWE ids for CVE-2023-0811

  • The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
    Assigned by: ics-cert@hq.dhs.gov (Primary)

References for CVE-2023-0811

Products affected by CVE-2023-0811

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