• Configure ingress filtering to control traffic flow when port mirroring is enabled:

  • Enable Ingress Filtering
  • Disabled RSTP on the Target port(s)
  • Disable Neighbor Discovery protocol on the target port(s)
  • Disable LLDP on the target port(s)
• Further details can be find at https://support.industry.siemens.com/cs/ww/en/view/109759351

Product-specific remediations or mitigations can be found in the section Affected Products and Solution.
Please follow the General Security Recommendations.

As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity

The vulnerability classification has been performed by using the CVSS scoring system in version 3.1 (CVSS v3.1) (https://www.first.org/cvss/). The CVSS environmental score is specific to the customer’s environment and will impact the overall CVSS score. The environmental score should therefore be individually defined by the customer to accomplish final scoring.

An additional classification has been performed using the CWE classification, a community-developed list of common software security weaknesses. This serves as a common language and as a baseline for weakness identification, mitigation, and prevention efforts. A detailed list of CWE classes can be found at: https://cwe.mitre.org/.

The fix for RS900 devices (see full list below) doesn't apply for devices using the M88E6083 chip. To check which chip is used by your RS900 device:

1. Login to the device via the local console, SSH, or telnet (for NC class devices) with the administrator credentials
2. Enter the interactive shell by using the hot-key “Ctrl-S”
3. Enter the factory mode by typing the “factory” command, and follow the prompts to login.
4. Enter the command “m88e6 globals”

If the output contains the text “M88E6083”, then the device is unable to be patched (see WORKAROUNDS AND MITIGATIONS section).Otherwise, the device can be patched with the firmware version identified in the AFFECTED PRODUCTS AND SOLUTION table above.

List of RS900 devices:

• RUGGEDCOM RS900
• RUGGEDCOM RS900L
• RUGGEDCOM RS900LNC
• RUGGEDCOM RS900NC

https://www.siemens.com/cert/advisories