CVE-2018-4839 — A vulnerability has been identified in DIGSI 4 (All versions < V4

A vulnerability has been identified in DIGSI 4 (All versions < V4.92), EN100 Ethernet module DNP3 variant (All versions < V1.05.00), EN100 Ethernet module IEC 104 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet modul

01What is this vulnerability?

A vulnerability has been identified in DIGSI 4 (All versions < V4.92), EN100 Ethernet module DNP3 variant (All versions < V1.05.00), EN100 Ethernet module IEC 104 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.30), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module PROFINET IO variant (All versions), Other SIPROTEC 4 relays (All…

02Affected products

Vendor	Product	Versions
Siemens	DIGSI 4	All versions < V4.92
Siemens	EN100 Ethernet module DNP3 variant	All versions < V1.05.00
Siemens	EN100 Ethernet module IEC 104 variant	All versions
Siemens	EN100 Ethernet module IEC 61850 variant	All versions < V4.30
Siemens	EN100 Ethernet module Modbus TCP variant	All versions
Siemens	EN100 Ethernet module PROFINET IO variant	All versions
Siemens	Other SIPROTEC 4 relays	All versions
Siemens	Other SIPROTEC Compact relays	All versions
Siemens	SIPROTEC 4 7SD80	All versions < V4.70
Siemens	SIPROTEC 4 7SJ61	All versions < V4.96
Siemens	SIPROTEC 4 7SJ62	All versions < V4.96
Siemens	SIPROTEC 4 7SJ64	All versions < V4.96
Siemens	SIPROTEC 4 7SJ66	All versions < V4.30
Siemens	SIPROTEC Compact 7SJ80	All versions < V4.77
Siemens	SIPROTEC Compact 7SK80	All versions < V4.77

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: 2024-08-05T05:18:26.659Z

09References

• cert-portal.siemens.com — https://cert-portal.siemens.com/productcert/pdf/ssa-203306.pdf