CVE-2017-6034

Schneider Electric Modicon Modbus Protocol Authentication Bypass by Capture-replay

State: Published
Severity: 9.8 Critical
Published: Jun 30, 2017
Updated: Jun 4, 2026
Reserved: Feb 16, 2017

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-294

Affected Products

Product	Versions
Modicon Modbus ProtocolSchneider Electric	all versionsAffected

References

https://ics-cert.us-cert.gov/advisories/ICSA-17-101-01
97562vdb-entry
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2017/icsa-17-101-01.json
https://www.se.com/us/en/download/document/SEVD-2017-065-01/

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