Siemens Simatic TDC Kommunikationsbaugruppe CP51M1 Circuit Board 6DD1661-0AE1 E-Stand 02

Siemens Simatic TDC Kommunikationsbaugruppe CP51M1 Circuit Board 6DD1661-0AE1 E-Stand 02

SUMMARY
The SIPROTEC 5 Ethernet plug-in communication modules and devices are affected by multiple security vulnerabilities. These vulnerabilities could allow an attacker to leverage various attacks, e.g. to execute
arbitrary code over the network.
Eleven of these vulnerabilities affect the underlying Wind River VxWorks network stack and were recently patched by Wind River. One further vulnerability affects the boot process of the device under certain conditions.
Siemens has released updates for all vulnerabilities in some products, is working on updates for the remaining affected products, and recommends specific countermeasures until fixes are available.




GENERAL SECURITY RECOMMENDATIONS
Operators of critical power systems (e.g. TSOs) worldwide are usually required by regulations to build resilience into the power grids by applying multi-level redundant secondary protection schemes. It is therefore recommended that the operators check whether appropriate resilient protection measures are in place. The risk of cyber incidents impacting the grid’s reliability can thus be minimized by virtue of the
grid design.
Siemens strongly recommends applying the provided security updates using the corresponding tooling and documented procedures made available with the product. If supported by the product, an automated means to apply the security updates across multiple product instances may be used. Siemens strongly recommends prior validation of any security update before being applied, and supervision by trained staff
of the update process in the target environment.
As a general security measure Siemens strongly recommends to protect network access with appropriate mechanisms (e.g. firewalls, segmentation, VPN). It is advised to configure the environment according to our operational guidelines in order to run the devices in a protected IT environment
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