Authorization Bypass in SIMATIC Drive Controllers and Other Siemens Products
CVE-2020-28397

5.3MEDIUM

Key Information:

Vendor
Siemens
Status
Simatic Drive Controller Family
Simatic Et 200sp Open Controller Cpu 1515sp Pc2 (incl. Siplus Variants)
Simatic S7 Plcsim Advanced
Simatic S7-1200 Cpu Family (incl. Siplus Variants)
Vendor
CVE Published:
10 August 2021

Summary

A flaw has been discovered in various Siemens products, including the SIMATIC Drive Controller family and ET 200SP Open Controller CPUs, due to an incorrect authorization check. This vulnerability allows an attacker to potentially extract sensitive information about access-protected PLC program variables over TCP port 102. By reading multiple attributes at once, malicious actors could exploit this weakness, compromising the integrity of system operations and exposing critical data to unauthorized users.

Affected Version(s)

SIMATIC Drive Controller family All versions < V2.9.2

SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) All versions < V21.9

SIMATIC S7 PLCSIM Advanced All versions > V2 < V4

References

https://cert-portal.siemens.com/productcert/pdf/ssa-86532...
x_refsource_MISC

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.