CVE-2017-11401

critical

Description

An issue has been discovered on the Belden Hirschmann Tofino Xenon Security Appliance before 03.2.00. Improper handling of the mbap.length field of ModBus packets in the ModBus DPI filter allows an attacker to send malformed/crafted packets to a protected asset, bypassing function code filtering.

References

https://www.belden.com/hubfs/support/security/bulletins/Belden-Security-Bulletin-BSECV-2017-14-1v1-1.pdf

https://github.com/airbus-seclab/security-advisories/blob/master/belden/tofino.txt

Details

Source: Mitre, NVD

Published: 2017-11-20

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.00041