Siemens KTK, SIDOOR, SIMATIC, and SINAMICS Uncontrolled Resource Consumption (CVE-2019-19300)

high Tenable OT Security Plugin ID 500363

Synopsis

The remote OT asset is affected by a vulnerability.

Description

A vulnerability has been identified in Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200 (All versions), Development/Evaluation Kits for PROFINET IO: EK-ERTEC 200P (All versions), KTK ATE530S (All versions), SIDOOR ATD430W (All versions), SIDOOR ATE530S COATED (All versions), SIDOOR ATE531S (All versions), SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants) (All versions < V2.0), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V2.0), SIMATIC ET200AL IM157-1 PN (All versions), SIMATIC ET200ecoPN, CM 8x IO-Link, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, DI 16x24VDC, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, DI 8x24VDC, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, DIQ 16x24VDC/2A, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, DQ 8x24VDC/0,5A, M12-L (All versions >= V5.1.1), SIMATIC ET200ecoPN, DQ 8x24VDC/2A, M12-L (All versions >= V5.1.1), SIMATIC ET200MP IM155-5 PN HF (incl. SIPLUS variants) (All versions >= V4.2), SIMATIC ET200SP IM155-6 MF HF (All versions), SIMATIC ET200SP IM155-6 PN HA (incl. SIPLUS variants) (All versions), SIMATIC ET200SP IM155-6 PN HF (incl. SIPLUS variants) (All versions >= V4.2), SIMATIC ET200SP IM155-6 PN/2 HF (incl. SIPLUS variants) (All versions >= V4.2), SIMATIC ET200SP IM155-6 PN/3 HF (incl. SIPLUS variants) (All versions >= V4.2), SIMATIC MICRO-DRIVE PDC (All versions), SIMATIC PN/MF Coupler (All versions), SIMATIC PN/PN Coupler (incl. SIPLUS NET variants) (All versions >= V4.2), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (All versions < V4.4.0), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions < V2.0), SIMATIC S7-1500 Software Controller (All versions < V2.0), SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 H V6 CPU family and below (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-410 V10 CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-410 V8 CPU family (incl. SIPLUS variants) (All versions), SIMATIC TDC CP51M1 (All versions), SIMATIC TDC CPU555 (All versions), SIMATIC WinAC RTX 2010 (All versions), SIMATIC WinAC RTX F 2010 (All versions), SINAMICS S/G Control Unit w. PROFINET (All versions). The Interniche-based TCP Stack can be forced to make very expensive calls for every incoming packet which can lead to a denial of service.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original can be found at CISA.gov.

Siemens recommends applying updates if available:

- SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants): Update to v2.1.7
- SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants): Update to v20.8
- SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants): Update to v2.8
- SIMATIC S7-1500 Software Controller: Update to v20.8
- SIMATIC S7-1200 CPU family (incl. SIPLUS variants): Update to v4.5.2 or later

- SIMATIC S7-410 CPU family (incl. SIPLUS variants): Update to v10.1.1 or later.
- Users should disable the ethernet ports on the CPU and use a communication module (like CP) for communication instead

Siemens has not identified any specific mitigations or workarounds and recommends following their general security recommendations. As a general security measure, Siemens strongly recommends protecting network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends configuring the environment according to the Siemens operational guidelines for Industrial Security and following the recommendations in the product manuals.

For additional information, users can refer to Siemens Security Advisory SSA-593272 in HTML or CSAF formats.

Plugin Details

Severity: High

ID: 500363

Version: 1.8

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 3/4/2024

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2019-19300

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:siemens:simatic_et200mp_im155-5_pn_hf_firmware, cpe:/o:siemens:simatic_et200sp_im155-6_mf_hf_firmware, cpe:/o:siemens:simatic_et200sp_im155-6_pn%2f2_hf_firmware:4, cpe:/o:siemens:simatic_et200sp_im155-6_pn_ha_firmware, cpe:/o:siemens:simatic_et200sp_im155-6_pn_hf_firmware, cpe:/o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc2_firmware, cpe:/o:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1511-1_pn_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1511f-1_pn_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1513-1_pn_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1513f-1_pn_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1515-2_pn_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1515f-2_pn_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1516-3_pn%2fdp_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1516f-3_pn%2fdp_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1517-3_pn%2fdp_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1517f-3_pn%2fdp_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1518-4_pn%2fdp_firmware, cpe:/o:siemens:simatic_s7-1500_cpu_1518f-4_pn%2fdp_firmware, cpe:/o:siemens:simatic_s7-300_cpu_firmware, cpe:/o:siemens:simatic_s7-400_pn%2fdp_firmware, cpe:/o:siemens:simatic_tdc_cp51m1_firmware, cpe:/o:siemens:simatic_tdc_cpu555_firmware

Required KB Items: Tenable.ot/Siemens

Exploit Ease: No known exploits are available

Patch Publication Date: 4/14/2020

Vulnerability Publication Date: 4/14/2020

Reference Information

CVE: CVE-2019-19300

CWE: 400

Detections

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