Siemens Simatic Insufficiently Protected Credentials

medium Tenable.ot Plugin ID 500385
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

A vulnerability has been identified in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 CPU family (incl. SIPLUS variants) (All versions), SIMATIC WinAC RTX (F) 2010 (All versions), SINUMERIK 840D sl (All versions). The authentication protocol between a client and a PLC via port 102/tcp (ISO-TSAP) insufficiently protects the transmitted password. This could allow an attacker that is able to intercept the network traffic to obtain valid PLC credentials.

Solution

Refer to vendor advisory for Security Updates

See Also

https://cert-portal.siemens.com/productcert/pdf/ssa-381684.pdf

Plugin Details

Severity: Medium

ID: 500385

Version: 1.0

Type: local

Family: SCADA

Published: 8/10/2021

Updated: 8/10/2021

Risk Information

CVSS Score Source: CVE-2020-15791

CVSS v2

Risk Factor: Low

Base Score: 3.3

Vector: AV:A/AC:L/Au:N/C:P/I:N/A:N

CVSS v3

Risk Factor: Medium

Base Score: 6.5

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

Vulnerability Information

CPE: cpe:2.3:o:siemens:simatic_s7-300_cpu_314_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-300_cpu_315-2_dp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-300_cpu_317-2_dp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-300_cpu_312_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-300_cpu_315-2_pn_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-300_cpu_315f-2_dp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-300_cpu_315f-2_pn_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-300_cpu_317-2_pn_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-300_cpu_317f-2_dp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-300_cpu_317f-2_pn_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-400_cpu_412_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-400_cpu_414_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-400_cpu_416_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-400_cpu_417_firmware:*:*:*:*:*:*:*:*

Patch Publication Date: 9/9/2020

Vulnerability Publication Date: 9/9/2020

Reference Information

CVE: CVE-2020-15791