CVE intelligence and bounded remediation

CVE-2019-13944 — Siemens En100 Ethernet Module With Firmware Variant Dnp3 Tcp security vulnerability

Medium CVSS 5.3

A vulnerability has been identified in EN100 Ethernet module DNP3 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.37), EN100 Ethernet module IEC104 variant (All versions), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module PROFINET IO variant (All versions). A vulnerability in the integrated web server of the affected devices could allow unauthorized attackers to obtain sensitive information about the device, including logs and configurations. At the time of advisory publication no public exploitation of this security vulnerability was known.

Severity
Medium
CVSS
5.3 (3.1)
Published
2019-12-12
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-23, CWE-22

Affected products

  • siemens / en100_ethernet_module_with_firmware_variant_dnp3_tcp
  • siemens / en100_ethernet_module_with_firmware_variant_iec_61850
  • siemens / en100_ethernet_module_with_firmware_variant_iec104
  • siemens / en100_ethernet_module_with_firmware_variant_modbus_tcp
  • siemens / en100_ethernet_module_with_firmware_variant_profinet_io

Matched remediation archetype

Path traversal, unsafe upload, and file handling

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Trace untrusted filenames, archive entries, URLs, and path segments into read, write, include, extraction, and upload operations.
  • Identify filesystem roots, mount permissions, symbolic-link behavior, archive handling, and whether uploaded content is web-accessible or executable.
  • Review canonicalization and containment checks across supported operating systems and storage backends.

Remediate safely

  • Generate server-side storage identifiers and resolve paths beneath a fixed root using filesystem-aware containment checks.
  • Reject absolute, parent-relative, alternate-separator, device, link, and archive entries that escape the intended root.
  • Store uploads outside executable or served paths, validate type and size, and use private atomic temporary files.

Authoritative sources

Complete CVE record and remediation plan

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