CWE
326
Advisory Published
Updated

CVE-2018-4839: Weak Encryption

First published: Thu Mar 08 2018(Updated: )

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 versions), Other SIPROTEC Compact relays (All versions), SIPROTEC 4 7SD80 (All versions < V4.70), SIPROTEC 4 7SJ61 (All versions < V4.96), SIPROTEC 4 7SJ62 (All versions < V4.96), SIPROTEC 4 7SJ64 (All versions < V4.96), SIPROTEC 4 7SJ66 (All versions < V4.30), SIPROTEC Compact 7SJ80 (All versions < V4.77), SIPROTEC Compact 7SK80 (All versions < V4.77). An attacker with local access to the engineering system or in a privileged network position and able to obtain certain network traffic could possibly reconstruct access authorization passwords.

Credit: productcert@siemens.com

Affected SoftwareAffected VersionHow to fix
Siemens Siprotec Compact 7sj80 Firmware<4.77
Siemens Siprotec Compact 7sj80
Siemens Siprotec Compact 7sk80 Firmware<4.77
Siemens Siprotec Compact 7sk80
Siemens Siprotec 4 7sj66 Firmware<4.30
Siemens Siprotec 4 7sj66
Siemens Digsi 4<4.92
Siemens En100 Ethernet Module Iec 104 Firmware
Siemens En100 Ethernet Module Iec 104
Siemens En100 Ethernet Module Dnp3 Firmware
Siemens En100 Ethernet Module Dnp3
Siemens En100 Ethernet Module Modbus Tcp Firmware
Siemens En100 Ethernet Module Modbus Tcp
Siemens En100 Ethernet Module Profinet Io Firmware
Siemens En100 Ethernet Module Profinet Io
Siemens En100 Ethernet Module Iec 61850 Firmware<4.30
Siemens En100 Ethernet Module Iec 61850

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Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is CVE-2018-4839.

  • What is the severity of CVE-2018-4839?

    CVE-2018-4839 has a severity of 5.3 (medium).

  • Which software versions are affected by CVE-2018-4839?

    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), and EN100 Ethernet module Modbus TCP variant (All versions).

  • How can I fix CVE-2018-4839?

    Update to DIGSI 4 version V4.92 or later, EN100 Ethernet module DNP3 variant version V1.05.00 or later, EN100 Ethernet module IEC 61850 variant version V4.30 or later to fix CVE-2018-4839.

  • Where can I find more information about CVE-2018-4839?

    You can find more information about CVE-2018-4839 in the following references: [Siemens Cert Portal](https://cert-portal.siemens.com/productcert/pdf/ssa-203306.pdf) and [US-CERT Advisory](https://ics-cert.us-cert.gov/advisories/ICSA-18-067-01).

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