Auth bypass in Schneider-Electric Modicon M340
CVE-2018-7847
A CWE-284: Improper Access Control vulnerability exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum, and Modicon Premium which could cause denial of service or potential code execution by overwriting configuration settings of the controller over Modbus.
Vulnerability class: Broken Authentication
EPSS: 0.038 (88.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Schneider-electric Modicon_m340
- Schneider-electric Modicon_m340_firmware
- Schneider-electric Modicon_m580
- Schneider-electric Modicon_m580_firmware
- Schneider-electric Modicon_premium
- Schneider-electric Modicon_premium_firmware
- Schneider-electric Modicon_quantum
- Schneider-electric Modicon_quantum_firmware
- N/a Modicon M580 M340 Quantum Premium — versions Modicon M580 Modicon M340 Modicon Quantum Modicon Premium
Weakness classification (CWE)
References
- cybersecurity@se.com (x_refsource_MISC, Vendor Advisory)
- cybersecurity@se.com (Exploit, Third Party Advisory, x_refsource_MISC)
- cybersecurity@se.com (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2018-7847?
- CVE-2018-7847 is a critical-severity vulnerability in Schneider-Electric Modicon M340, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-05-22.
- How severe is CVE-2018-7847?
- Critical severity. CVSS v3 base score is 9.8 out of 10.