Authentication bypass by spoofing in Schneider Electric products - CVE-2018-7842
Published: October 3, 2019
Vulnerability identifier: #VU21495
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2018-7842
CWE-ID: CWE-290
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Schneider Electric
Affected software:
Modicon Quantum
Modicon Premium
Modicon M340
Modicon M580
Modicon Quantum
Modicon Premium
Modicon M340
Modicon M580
Detailed vulnerability description
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to improperly implemented authentication schemes that are subject to spoofing attacks. A remote attacker can gain elevated privileges by conducting a brute force attack on Modbus parameters sent to the controller.
How to mitigate CVE-2018-7842
Install updates from vendor's website.