Siemens Nucleus Improper Input Validation

high Tenable.ot Plugin ID 500407
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 APOGEE MEC/MBC/PXC (P2) (All versions < V2.8.2), APOGEE PXC Series (BACnet) (All versions >= V3.0), APOGEE PXC Series (P2) (All versions >= V2.8.2), Desigo PXC (Power PC) (All versions >= V2.3x and < V6.00.327), Desigo PXM20 (Power PC) (All versions >= V2.3x and < V6.00.327), Nucleus NET (All versions), Nucleus RTOS (All versions), Nucleus ReadyStart for ARM, MIPS, and PPC (All versions < V2017.02.2 with patch "Nucleus 2017.02.02 Nucleus NET Patch"), Nucleus SafetyCert (All versions), Nucleus Source Code (All versions), SIMOTICS CONNECT 400 (All versions <= V0.3.0.95), TALON TC Series (BACnet) (All versions >= V3.0), VSTAR (All versions). By sending specially crafted DHCP packets to a device where the DHCP client is enabled, an attacker could change the IP address of the device to an invalid value. The vulnerability could affect availability and integrity of the device. Adjacent network access is required, but no authentication and no user interaction is needed to conduct an attack.

Solution

Refer to vendor advisory for Security Updates

See Also

https://cert-portal.siemens.com/productcert/pdf/ssa-434032.pdf

https://cert-portal.siemens.com/productcert/pdf/ssa-162506.pdf

https://www.us-cert.gov/ics/advisories/icsa-20-105-06

https://us-cert.cisa.gov/ics/advisories/icsa-20-105-06

Plugin Details

Severity: High

ID: 500407

Version: 1.0

Type: local

Family: SCADA

Published: 8/10/2021

Updated: 8/10/2021

Risk Information

CVSS Score Source: CVE-2019-13939

CVSS v2

Risk Factor: Medium

Base Score: 4.8

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

CVSS v3

Risk Factor: High

Base Score: 7.1

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

Vulnerability Information

CPE: cpe:2.3:a:siemens:nucleus_net:*:*:*:*:*:*:*:*, cpe:2.3:a:siemens:nucleus_readystart:*:*:*:*:*:*:*:*, cpe:2.3:a:siemens:nucleus_safetycert:*:*:*:*:*:*:*:*, cpe:2.3:a:siemens:nucleus_source_code:*:*:*:*:*:*:*:*, cpe:2.3:a:siemens:vstar:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:nucleus_rtos:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:apogee_modular_building_controller_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:apogee_modular_equiment_controller_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:apogee_pxc_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:desigo_pxc_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:desigo_pxm20_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simotics_connect_400_firmware:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:talon_tc_firmware:*:*:*:*:*:*:*:*

Patch Publication Date: 1/16/2020

Vulnerability Publication Date: 1/16/2020

Reference Information

CVE: CVE-2019-13939