Trust boundary violation in Schneider Electric products - CVE-2018-7846

 

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

How to mitigate CVE-2018-7846

Install updates from vendor's website.

Modicon M340 - update to 3.10
Modicon M580 - update to 2.90

External References

Related Security Bulletins