Vulnerability in Siemens Scalance X200-4pirt
CVE-2020-28391
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.
EPSS: 0.011 (62.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Siemens Scalance_x200-4pirt
- Siemens Scalance_x200-4pirt_firmware
- Siemens Scalance X-200irt Switch Family (Incl. Siplus Net Variants) — versions All versions < V5.5.0
- Siemens Scalance X-200rna Switch Family — versions All versions < V3.2.7
- Siemens Scalance X-200 Switch Family (Incl. Siplus Net Variants) — versions All versions < V5.2.5
- Siemens Scalance_x201-3pirt
- Siemens Scalance_x201-3pirt_firmware
- Siemens Scalance_x202-2irt
- Siemens Scalance_x202-2irt_firmware
- Siemens Scalance_x202-2pirt
Weakness classification (CWE)
Public proof-of-concept exploits
References
- productcert@siemens.com (Vendor Advisory)
- productcert@siemens.com (US Government Resource, Third Party Advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-28391?
- CVE-2020-28391 is a medium-severity vulnerability in Siemens Scalance X200-4pirt, classified under Use of Hard-coded Cryptographic Key. CVSS score: 5.9/10. Published 2021-01-12.
- How severe is CVE-2020-28391?
- Medium severity. CVSS v3 base score is 5.9 out of 10.
- Is CVE-2020-28391 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.