VULNERABILITY INTELLIGENCE

CVE-2017-6034

CVSS score9.8 CRITICAL

EPSS probability5.18%

CISA KEVNot currently listed

Published2017-06-30

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

CWE-287: Improper Authentication
CWE-294: Authentication Bypass by Capture-replay

Primary references

ics-cert@hq.dhs.gov — Third Party Advisory, VDB Entry
ics-cert@hq.dhs.gov
ics-cert@hq.dhs.gov — Third Party Advisory, US Government Resource
ics-cert@hq.dhs.gov
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory, US Government Resource