CVE-2023-0027

low-risk
Published 2023-03-17

Rockwell Automation Modbus TCP Server AOI prior to 2.04.00 is vulnerable to an unauthorized user sending a malformed message that could cause the controller to respond with a copy of the most recent response to the last valid request. If exploited, an unauthorized user could read the connected device’s Modbus TCP Server AOI information.

Do I need to act?

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0.10% 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
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Modbus Tcp Server Add On Instructions

Affected Vendors

Rockwellautomation

References (2)

Permissions Required https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1138766
Permissions Required https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1138766
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal