A vulnerability has been identified in SCALANCE X-200 switch family...

Vulnerability Description

A vulnerability has been identified in SCALANCE X-200 switch family (incl. SIPLUS NET variants) (All versions < V5.2.5), SCALANCE X-200IRT switch family (incl. SIPLUS NET variants) (All versions < V5.5.0), SCALANCE X-200RNA switch family (All versions < V3.2.7). Devices create a new unique key upon factory reset, except when used with C-PLUG. When used with C-PLUG the devices use the hardcoded private RSA-key shipped with the firmware-image. An attacker could leverage this situation to a man-in-the-middle situation and decrypt previously captured traffic.

References

• https://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdf
• https://us-cert.cisa.gov/ics/advisories/icsa-21-012-02