A vulnerability has been found in Siemens SIPROTEC 5 (version now known) and classified as critical. Affected by this vulnerability is some unknown processing of the component Ethernet Plug-In Communication Module. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability has been identified in Ethernet plug-in communication modules for SIPROTEC 5 devices with CPU variants CP200 (All versions), SIPROTEC 5 devices with CPU variants CP300 (All versions). An unauthenticated attacker with network access to the device could potentially insert arbitrary code which is executed before firmware verification in the device.

The weakness was shared 08/02/2019. This vulnerability is known as CVE-2019-10938 since 04/08/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/20/2023). MITRE ATT&CK project uses the attack technique T1068 for this issue.

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

The entries VDB-139758, VDB-139759, VDB-139760 and VDB-139761 are related to this item.

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• Siemens

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• SIPROTEC 5

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• commercial

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