CVE intelligence and bounded remediation

CVE-2022-30938 — Siemens En100 Ethernet Module Dnp3 Ip Firmware security vulnerability

High CVSS 7.5

A vulnerability has been identified in EN100 Ethernet module DNP3 IP variant (All versions), EN100 Ethernet module IEC 104 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.40), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module PROFINET IO variant (All versions). Affected applications contains a memory corruption vulnerability while parsing specially crafted HTTP packets to /txtrace endpoint manupulating a specific argument. This could allow an attacker to crash the affected application leading to a denial of service condition

Severity
High
CVSS
7.5 (3.1)
Published
2022-07-12
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-119, CWE-787

Affected products

  • siemens / en100_ethernet_module_dnp3_ip_firmware
  • siemens / en100_ethernet_module_iec_104_firmware
  • siemens / en100_ethernet_module_iec_61850_firmware
  • siemens / en100_ethernet_module_modbus_tcp_firmware
  • siemens / en100_ethernet_module_profinet_io_firmware

Matched remediation archetype

Buffer bounds, memory safety, and memory corruption

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Check exposure

  • Identify affected native-code versions, build flags, architectures, parsers, codecs, drivers, and input paths in all shipped artifacts.
  • Determine whether untrusted data reaches the affected routine and the process privilege, sandbox, and network exposure.
  • Confirm statically linked, vendored, firmware, and platform-provided copies, not only package-manager records.

Remediate safely

  • Apply the maintained upstream correction or replace the affected component, then rebuild every dependent artifact from clean inputs.
  • Adopt bounds-checked interfaces, validated sizes and integer conversions, clear ownership, and memory-safe components where practical.
  • Enable supported compiler and runtime hardening and add sanitized tests and fuzz regression seeds derived from non-weaponized fixtures.

Authoritative sources

Complete CVE record and remediation plan

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