A vulnerability classified as critical has been found in Siemens SIMATIC S7-1200 CPU (SCADA Software) (the affected version is unknown). Affected is an unknown code of the component UART Handler. The manipulation with an unknown input leads to a routine vulnerability. CWE is classifying the issue as CWE-749. The product provides an Applications Programming Interface (API) or similar interface for interaction with external actors, but the interface includes a dangerous method or function that is not properly restricted. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

A vulnerability has been identified in S7-1200 CPU (All versions). There is an access mode used during manufacturing of S7-1200 CPUs that allows additional diagnostic functionality. The security vulnerability could be exploited by an attacker with physical access to the UART interface during boot process. At the time of advisory publication no public exploitation of this security vulnerability was known.

The weakness was published 12/12/2019. This vulnerability is traded as CVE-2019-13945 since 07/18/2019. The attack needs to be approached locally. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Productinfo

Type

• SCADA Software

Vendor

• Siemens

Name

• SIMATIC S7-1200 CPU

License

• commercial

CPE 2.3info

• 🔍

CPE 2.2info

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