Detections
Analytics

Siemens S7-300 Denial of Service Vulnerability

high Nessus Network Monitor Plugin ID 221

Synopsis

A Siemens S7-300 central processing unit (CPU) has been detected which contains a flaw that could allow a DoS attack over port 102/TCP (ISO-TSAP) or via Profibus.

Description

Siemens S7-300 central processing units (CPUs) with Profinet support less than version 3.2.12 and without Profinet support less than version 3.3.12 have a vulnerability which could allow a remote attacker to cause a Denial of Service condition. The attack involves sending specially crafted packets to 102/TCP and could cause the device to go into defect mode. A cold restart is required to recover the system.

Solution

Siemens recommends applying SIMATIC S7-300 firmware version V3.2.12 or V3.3.12 which fix the vulnerability

See Also

https://cert-portal.siemens.com/productcert/pdf/ssa-818183.pdf

Plugin Details

Severity: High

ID: 221

Family: SCADA

Published: 5/21/2019

Updated: 9/30/2019

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

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_s7-300_cpu_firmware

Patch Publication Date: 6/8/2016

Vulnerability Publication Date: 6/8/2016

Reference Information

CVE: CVE-2016-3949

BID: 91133