Project Subscriptions
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2017-15102 | An Authentication Bypass by Capture-Replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download. |
Solution
No solution given by the vendor.
Workaround
Schneider Electric has reported that they have introduced compensating controls to limit the exploitability of the identified vulnerabilities in many of the PLCs in the Modicon family; however, Schneider Electric recommends that users apply security measures to improve resiliency. Schneider Electric’s Momentum M1E controllers (all versions of model 171CBU98090 and all versions of model 171CBU98091) do not have built-in compensating controls to limit the exploitability of the identified vulnerabilities and Schneider Electric instructs users to take the following defensive measures: * Protect access to M1E controllers by a firewall blocking all remote/external access to Port 502. Schneider Electric reports that Modicon M340, M580, Premium and Quantum users should take one or more of the following defensive measures: * Enable protection based on an authentication to connect to PLC. This method relies on a feature named Application Password. Once enabled, password-based authentication is required whenever a user connects to change their application program; * Enable protection relying on an input (M340, Premium, Quantum) or a key switch in the front panel (Quantum) to reject remote connection or run/stop commands; and * Enable the “Access Control List protection,” where users are able to configure the restricted IP addresses that are pre-authorized to control the PLC. For additional information, Schneider Electric has released a Cybersecurity Notification, which is available at the following location: https://www.se.com/us/en/download/document/SEVD-2017-065-01/
Thu, 04 Jun 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | An Authentication Bypass by Capture-Replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download. | An authentication bypass by capture-replay issue was discovered in Schneider Electric Modicon Modbus Protocol. Sensitive information is transmitted in cleartext in the Modicon Modbus protocol, which may allow an attacker to replay the following commands: run, stop, upload, and download. |
| Title | Schneider Electric Modicon Modbus Protocol Authentication Bypass by Capture-replay | |
| References |
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Thu, 28 May 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: icscert
Published:
Updated: 2026-06-04T21:07:21.157Z
Reserved: 2017-02-16T00:00:00.000Z
Link: CVE-2017-6034
Updated: 2024-08-05T15:18:49.398Z
Status : Modified
Published: 2017-06-30T03:29:00.453
Modified: 2026-06-04T22:16:51.503
Link: CVE-2017-6034
No data.
OpenCVE Enrichment
No data.
EUVD