CVE-2018-4838

Description

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 unauthenticated user to upgrade or downgrade the firmware of the device, including to older versions with known vulnerabilities.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.25%
Vendor Advisory siemens.com
Affected: Siemens AG EN100 Ethernet module IEC 61850 variant
Affected: Siemens AG EN100 Ethernet module DNP3 variant
Affected: Siemens AG EN100 Ethernet module PROFINET IO variant
Affected: Siemens AG EN100 Ethernet module Modbus TCP variant
Affected: Siemens AG EN100 Ethernet module IEC 104 variant
Published at:
Updated at:

References

Link Tags
https://cert-portal.siemens.com/productcert/pdf/ssa-845879.pdf patch vendor advisory
https://www.securityfocus.com/bid/103379 vdb entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-067-01 third party advisory us government resource

Frequently Asked Questions

What is the severity of CVE-2018-4838?
CVE-2018-4838 has been scored as a high severity vulnerability.
How to fix CVE-2018-4838?
To fix CVE-2018-4838, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-4838 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2018-4838 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-4838?
CVE-2018-4838 affects Siemens AG EN100 Ethernet module IEC 61850 variant, Siemens AG EN100 Ethernet module DNP3 variant, Siemens AG EN100 Ethernet module PROFINET IO variant, Siemens AG EN100 Ethernet module Modbus TCP variant, Siemens AG EN100 Ethernet module IEC 104 variant.
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