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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Siemens | Scalance X200-4Pirt Firmware | < 5.5.0 |
| Siemens | Scalance X200-4Pirt | - |
| Siemens | Scalance X201-3Pirt Firmware | < 5.5.0 |
| Siemens | Scalance X201-3Pirt | - |
| Siemens | Scalance X202-2Irt Firmware | < 5.5.0 |
| Siemens | Scalance X202-2Irt | - |
| Siemens | Scalance X202-2Pirt Firmware | < 5.5.0 |
| Siemens | Scalance X202-2Pirt | - |
| Siemens | Scalance X202-2Pirt Siplus Net Firmware | < 5.5.0 |
| Siemens | Scalance X202-2Pirt Siplus Net | - |
| Siemens | Scalance X204Irt Firmware | < 5.5.0 |
| Siemens | Scalance X204Irt | - |
| Siemens | Scalance X307-3 Firmware | All versions |
| Siemens | Scalance X307-3 | - |
| Siemens | Scalance X307-3Ld Firmware | All versions |
| Siemens | Scalance X307-3Ld | - |
| Siemens | Scalance X308-2 Firmware | All versions |
| Siemens | Scalance X308-2 | - |
| Siemens | Scalance X308-2Ld Firmware | All versions |
| Siemens | Scalance X308-2Ld | - |
Related Weaknesses (CWE)
References
- https://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdfVendor Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-012-02Third Party AdvisoryUS Government ResourceVendor Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdfVendor Advisory
- https://us-cert.cisa.gov/ics/advisories/icsa-21-012-02Third Party AdvisoryUS Government ResourceVendor Advisory
FAQ
What is CVE-2020-28391?
CVE-2020-28391 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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....
How severe is CVE-2020-28391?
CVE-2020-28391 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-28391?
Check the references section above for vendor advisories and patch information. Affected products include: Siemens Scalance X200-4Pirt Firmware, Siemens Scalance X200-4Pirt, Siemens Scalance X201-3Pirt Firmware, Siemens Scalance X201-3Pirt, Siemens Scalance X202-2Irt Firmware.