Siemens En100 Improper Restriction of Operations within the Bounds of a Memory Buffer

high Tenable.ot Plugin ID 500352
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Description

A vulnerability has been identified in EN100 Ethernet module DNP3 variant (All versions), EN100 Ethernet module IEC 61850 variant (All versions < V4.37), EN100 Ethernet module IEC104 variant (All versions), EN100 Ethernet module Modbus TCP variant (All versions), EN100 Ethernet module PROFINET IO variant (All versions). An unauthorized user could exploit a buffer overflow vulnerability in the webserver. Specially crafted packets sent could cause a Denial-of-Service condition and if certain conditions are met, the affected devices must be restarted manually to fully recover. At the time of advisory publication no public exploitation of this security vulnerability was known.

Solution

Refer to vendor advisory for Security Updates

See Also

https://cert-portal.siemens.com/productcert/pdf/ssa-418979.pdf

https://www.us-cert.gov/ics/advisories/icsa-19-344-07

Plugin Details

Severity: High

ID: 500352

Version: 1.0

Type: local

Family: SCADA

Published: 5/27/2020

Updated: 5/27/2020

Risk Information

CVSS Score Source: CVE-2019-13942

CVSS v2

Risk Factor: Medium

Base Score: 5

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

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Vulnerability Information

CPE: cpe:2.3:o:siemens:en100_ethernet_module_with_firmware_variant_dnp3_tcp:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:en100_ethernet_module_with_firmware_variant_iec104:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:en100_ethernet_module_with_firmware_variant_iec_61850:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:en100_ethernet_module_with_firmware_variant_modbus_tcp:*:*:*:*:*:*:*:*, cpe:2.3:o:siemens:en100_ethernet_module_with_firmware_variant_profinet_io:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:en100_ethernet_module:-:*:*:*:*:*:*:*

Patch Publication Date: 12/12/2019

Vulnerability Publication Date: 12/12/2019

Reference Information

CVE: CVE-2019-13942