Siemens Simatic Uncontrolled Resource Consumption

high Tenable.ot Plugin ID 500362
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Description

A vulnerability has been identified in SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V2.5 and < V20.8), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.5 and < V2.8), SIMATIC S7-1500 Software Controller (All versions >= V2.5 and < V20.8). Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a Denial-of-Service condition. The vulnerability can be triggered if specially crafted UDP packets are sent to the device. The security vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the device availability.

Solution

Refer to vendor advisory for Security Updates

See Also

https://cert-portal.siemens.com/productcert/pdf/ssa-750824.pdf

https://www.us-cert.gov/ics/advisories/icsa-20-042-11

Plugin Details

Severity: High

ID: 500362

Version: 1.0

Type: local

Family: SCADA

Published: 5/27/2020

Updated: 5/27/2020

Risk Information

CVSS Score Source: CVE-2019-19281

CVSS v2

Risk Factor: High

Base Score: 7.8

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

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:simatic_et_200sp_open_controller_cpu_1515sp_pc2_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_et_200sp_open_controller_cpu_1515sp_pc2:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1511-1_pn_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1511-1_pn:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1513-1_pn_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1513-1_pn:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1515-2_pn_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1515-2_pn:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1516-3_pn_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1516-3_pn:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1516-3_dp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1516-3_dp:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1517-3_pn_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1517-3_pn:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1517-3_dp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1517-3_dp:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1518-4_pn_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1518-4_pn:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1518-4_dp_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1518-4_dp:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1507s_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1507s:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1508s_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1508s:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1507s_f_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1507s_f:-:*:*:*:*:*:*:*, cpe:2.3:o:siemens:simatic_s7-1500_cpu_1508s_f_firmware:*:*:*:*:*:*:*:*, cpe:2.3:h:siemens:simatic_s7-1500_cpu_1508s_f:-:*:*:*:*:*:*:*

Patch Publication Date: 3/10/2020

Vulnerability Publication Date: 3/10/2020

Reference Information

CVE: CVE-2019-19281