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Vulnerability · Published Mar 16, 2023 · Assigned by icscert

CVE-2023-0811

Critical 9.1

In plain English

A critical-severity improper access control in CJ1M SYSMAC CJ-series from Omron . There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)0.6%top 50.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 (as reported)

VendorProductVersions
Omron CJ1M SYSMAC CJ-series All versions
Omron CJ1M SYSMAC CJ-series All versions
Omron CJ1M SYSMAC CJ-series All versions
Omron CJ1M SYSMAC CJ-series All versions
Omron CJ1M SYSMAC CS-series All versions
Omron CJ1M SYSMAC CS-series All versions
Omron CJ1M SYSMAC CS-series All versions
Omron CJ1M SYSMAC CS-series All versions
Omron CJ1M SYSMAC CS-series All versions
Omron CJ1M SYSMAC CS-series All versions
Omron CJ1M SYSMAC CS-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions
Omron CJ1M SYSMAC CP-series All versions

Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

References