What is the CVSS score of CVE-2018-4840?

CVE-2018-4840 has a CVSS 3.0 base score of 7.5 (High). CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N. EPSS exploitation probability: 1.8%.

Is there a patch available for CVE-2018-4840?

Yes, a patch is available for CVE-2018-4840. Update the affected software to the latest version immediately.

Siprotec Compact 7Sj80 Firmware CVE-2018-4840

HIGH

Missing Authentication for Critical Function (CWE-306)

2018-03-08 productcert@siemens.com

Authentication Bypass Siprotec Compact 7Sj80 Firmware Siprotec Compact 7Sk80 Firmware Siprotec 4 7Sj66 Firmware Digsi 4 En100 Ethernet Module Iec 104 Firmware En100 Ethernet Module Dnp3 Firmware En100 Ethernet Module Modbus Tcp Firmware En100 Ethernet Module Profinet Io Firmware En100 Ethernet Module Iec 61850 Firmware

7.5

CVSS 3.0 · NVD

Severity by source

NVD PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Lifecycle Timeline

CVE Published

Mar 08, 2018 - 17:29 nvd

HIGH 7.5

DescriptionNVD

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). The device engineering mechanism allows an unauthenticated remote user to upload a modified device configuration overwriting access authorization passwords.

AnalysisAI

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. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Missing Authentication for Critical Function vulnerability could allow attackers to access critical functionality without authentication.

Technical ContextAI

This vulnerability is classified as Missing Authentication for Critical Function (CWE-306), which allows attackers to access critical functionality without authentication. 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). The device engineering mechanism allows an unauthenticated remote user to upload a modified device configuration overwriting access authorization passwords. Affected products include: Siemens Siprotec Compact 7Sj80 Firmware, Siemens Siprotec Compact 7Sk80 Firmware, Siemens Siprotec 4 7Sj66 Firmware, Siemens Digsi 4, Siemens En100 Ethernet Module Iec 104 Firmware.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Require authentication for all sensitive operations, implement defense in depth.