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Vulnerability Details : CVE-2018-16561

A vulnerability has been identified in SIMATIC S7-300 CPUs (All versions < V3.X.16). The affected CPUs improperly validate S7 communication packets which could cause a Denial-of-Service condition of the CPU. The CPU will remain in DEFECT mode until manual restart. Successful exploitation requires an attacker to be able to send a specially crafted S7 communication packet to a communication interface of the CPU. This includes Ethernet, PROFIBUS, and Multi Point Interfaces (MPI). No user interaction or privileges are required to exploit the security vulnerability. The vulnerability could allow causing a Denial-of-Service condition of the core functionality of the CPU, compromising the availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known. Siemens confirms the security vulnerability and provides mitigations to resolve the security issue.
Publish Date : 2019-04-17 Last Update Date : 2019-04-19
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- CVSS Scores & Vulnerability Types

CVSS Score
7.8
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s)
CWE ID 399

- Products Affected By CVE-2018-16561

# Product Type Vendor Product Version Update Edition Language
1 OS Siemens Simatic S7-300 Firmware - Version Details Vulnerabilities
2 OS Siemens Simatic S7-300f Firmware - Version Details Vulnerabilities
3 OS Siemens Simatic S7-300fs Firmware - Version Details Vulnerabilities
4 OS Siemens Simatic S7-300t Firmware - Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Siemens Simatic S7-300 Firmware 1
Siemens Simatic S7-300f Firmware 1
Siemens Simatic S7-300fs Firmware 1
Siemens Simatic S7-300t Firmware 1

- References For CVE-2018-16561

https://cert-portal.siemens.com/productcert/pdf/ssa-306710.pdf

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)
Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)
Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)
Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)

- Metasploit Modules Related To CVE-2018-16561

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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