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CVE-2020-28391

Published: Jan 12, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-321
NVD MITRE
5.9CVSSMEDIUM
EPSS Score
1.1%
Top 38.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-321CWE-798

Affected Products

SCALANCE X-200 switch family (incl. SIPLUS NET variants)SiemensICS / OT / IoT
SCALANCE X-200IRT switch family (incl. SIPLUS NET variants)SiemensICS / OT / IoT
SCALANCE X-200RNA switch familySiemensICS / OT / IoT
SCALANCE X-300Siemens AGICS / OT / IoT
SCALANCE X-200Siemens AGICS / OT / IoT
siemenscommercialDEEnterprise Softwareaka siemens ag
siemens agcommercialDEEnterprise Softwareaka siemens
and 67 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

MITRE ATT&CK

2 techniques
Credential Access
Initial Access
View detailed technique mapping

References

https://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdf
cert-portal.siemens.com
https://us-cert.cisa.gov/ics/advisories/icsa-21-012-02
us-cert.cisa.gov
https://cert-portal.siemens.com/productcert/pdf/ssa-274900.pdf&#13;
cert-portal.siemens.com
and 12 more references View all →

Timeline

Published
Jan 12, 2021
Last Updated
Nov 21, 2024

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