CVE-2018-4838 — A vulnerability has been identified in EN100 Ethernet module IEC 61850 variant (

A vulnerability has been identified in EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module DNP3 variant (All versions < V1.04), EN100 Ethernet module PROFINET IO variant (All versions), EN100 Ethernet module Modbus TCP variant (All versions

01What is this vulnerability?

A vulnerability has been identified in EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module DNP3 variant (All versions < V1.04), EN100 Ethernet module PROFINET IO variant (All versions), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module IEC 104 variant (All versions < V1.22). The web interface (TCP/80) of affected devices allows an…

02Affected products

Vendor	Product	Versions
Siemens AG	EN100 Ethernet module IEC 61850 variant	All versions < V4.30
Siemens AG	EN100 Ethernet module DNP3 variant	All versions < V1.04
Siemens AG	EN100 Ethernet module PROFINET IO variant	All versions
Siemens AG	EN100 Ethernet module Modbus TCP variant	All versions
Siemens AG	EN100 Ethernet module IEC 104 variant	All versions < V1.22

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-03-08T17:00:00.000Z
• Last modified: 2024-08-05T05:18:26.631Z

09References

• cert-portal.siemens.com — https://cert-portal.siemens.com/productcert/pdf/ssa-845879.pdf
• www.securityfocus.com — https://www.securityfocus.com/bid/103379