Trust boundary violation in Schneider Electric products - CVE-2018-7846
Published: October 3, 2019
Vulnerability identifier: #VU21498
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-7846
CWE-ID:
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain unauthorized access to the target system.
The vulnerability exists on connection to the Controller due to the affected product mixes trusted and untrusted data in the same data structure or structured message. A remote attacker can conduct a brute force attack on Modbus protocol to the controller and gain unauthorized access to the target system.
Affected software
Modicon Quantum
Modicon Premium
Modicon M340
Modicon M580
Modicon Premium
Modicon M340
Modicon M580
How to mitigate CVE-2018-7846
Install updates from vendor's website.
Modicon M340 - update to 3.10
Modicon M580 - update to 2.90
Modicon M580 - update to 2.90